diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3e5b7c7..e7f0798 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+## 5.16.0 (31 March 2021)
+* Upgrade D3 to 5.16.0
+
 ## 5.9.2 (28 May 2019)
 * Upgrade D3 to 5.9.2
 
diff --git a/README.md b/README.md
index d8efeca..dfa1ef1 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ d3-rails provides D3 for Rails 3.1 and higher.
 
 ## Version
 
-d3-rails comes with version 5.9.2 of D3.js. The d3-rails version will
+d3-rails comes with version 5.16.0 of D3.js. The d3-rails version will
 always mirror the version of D3. If you need a newer version of
 d3-rails, see section Development (below).
 
diff --git a/app/assets/javascripts/d3.js b/app/assets/javascripts/d3.js
index b11658f..632b3fa 100644
--- a/app/assets/javascripts/d3.js
+++ b/app/assets/javascripts/d3.js
@@ -1,11 +1,11 @@
-// https://d3js.org v5.9.2 Copyright 2019 Mike Bostock
+// https://d3js.org v5.16.0 Copyright 2020 Mike Bostock
 (function (global, factory) {
 typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
 typeof define === 'function' && define.amd ? define(['exports'], factory) :
-(factory((global.d3 = global.d3 || {})));
-}(this, (function (exports) { 'use strict';
+(global = global || self, factory(global.d3 = global.d3 || {}));
+}(this, function (exports) { 'use strict';
 
-var version = "5.9.2";
+var version = "5.16.0";
 
 function ascending(a, b) {
   return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
@@ -737,7 +737,7 @@ var noop = {value: function() {}};
 
 function dispatch() {
   for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {
-    if (!(t = arguments[i] + "") || (t in _)) throw new Error("illegal type: " + t);
+    if (!(t = arguments[i] + "") || (t in _) || /[\s.]/.test(t)) throw new Error("illegal type: " + t);
     _[t] = [];
   }
   return new Dispatch(_);
@@ -1080,9 +1080,9 @@ function selection_join(onenter, onupdate, onexit) {
   return enter && update ? enter.merge(update).order() : update;
 }
 
-function selection_merge(selection$$1) {
+function selection_merge(selection) {
 
-  for (var groups0 = this._groups, groups1 = selection$$1._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
+  for (var groups0 = this._groups, groups1 = selection._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
     for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
       if (node = group0[i] || group1[i]) {
         merge[i] = node;
@@ -1478,11 +1478,13 @@ function selection_remove() {
 }
 
 function selection_cloneShallow() {
-  return this.parentNode.insertBefore(this.cloneNode(false), this.nextSibling);
+  var clone = this.cloneNode(false), parent = this.parentNode;
+  return parent ? parent.insertBefore(clone, this.nextSibling) : clone;
 }
 
 function selection_cloneDeep() {
-  return this.parentNode.insertBefore(this.cloneNode(true), this.nextSibling);
+  var clone = this.cloneNode(true), parent = this.parentNode;
+  return parent ? parent.insertBefore(clone, this.nextSibling) : clone;
 }
 
 function selection_clone(deep) {
@@ -1785,9 +1787,9 @@ function noevent() {
 
 function dragDisable(view) {
   var root = view.document.documentElement,
-      selection$$1 = select(view).on("dragstart.drag", noevent, true);
+      selection = select(view).on("dragstart.drag", noevent, true);
   if ("onselectstart" in root) {
-    selection$$1.on("selectstart.drag", noevent, true);
+    selection.on("selectstart.drag", noevent, true);
   } else {
     root.__noselect = root.style.MozUserSelect;
     root.style.MozUserSelect = "none";
@@ -1796,13 +1798,13 @@ function dragDisable(view) {
 
 function yesdrag(view, noclick) {
   var root = view.document.documentElement,
-      selection$$1 = select(view).on("dragstart.drag", null);
+      selection = select(view).on("dragstart.drag", null);
   if (noclick) {
-    selection$$1.on("click.drag", noevent, true);
-    setTimeout(function() { selection$$1.on("click.drag", null); }, 0);
+    selection.on("click.drag", noevent, true);
+    setTimeout(function() { selection.on("click.drag", null); }, 0);
   }
   if ("onselectstart" in root) {
-    selection$$1.on("selectstart.drag", null);
+    selection.on("selectstart.drag", null);
   } else {
     root.style.MozUserSelect = root.__noselect;
     delete root.__noselect;
@@ -1835,7 +1837,7 @@ DragEvent.prototype.on = function() {
 
 // Ignore right-click, since that should open the context menu.
 function defaultFilter() {
-  return !exports.event.button;
+  return !exports.event.ctrlKey && !exports.event.button;
 }
 
 function defaultContainer() {
@@ -1847,7 +1849,7 @@ function defaultSubject(d) {
 }
 
 function defaultTouchable() {
-  return "ontouchstart" in this;
+  return navigator.maxTouchPoints || ("ontouchstart" in this);
 }
 
 function drag() {
@@ -1864,8 +1866,8 @@ function drag() {
       touchending,
       clickDistance2 = 0;
 
-  function drag(selection$$1) {
-    selection$$1
+  function drag(selection) {
+    selection
         .on("mousedown.drag", mousedowned)
       .filter(touchable)
         .on("touchstart.drag", touchstarted)
@@ -1906,12 +1908,12 @@ function drag() {
 
   function touchstarted() {
     if (!filter.apply(this, arguments)) return;
-    var touches$$1 = exports.event.changedTouches,
+    var touches = exports.event.changedTouches,
         c = container.apply(this, arguments),
-        n = touches$$1.length, i, gesture;
+        n = touches.length, i, gesture;
 
     for (i = 0; i < n; ++i) {
-      if (gesture = beforestart(touches$$1[i].identifier, c, touch, this, arguments)) {
+      if (gesture = beforestart(touches[i].identifier, c, touch, this, arguments)) {
         nopropagation();
         gesture("start");
       }
@@ -1919,11 +1921,11 @@ function drag() {
   }
 
   function touchmoved() {
-    var touches$$1 = exports.event.changedTouches,
-        n = touches$$1.length, i, gesture;
+    var touches = exports.event.changedTouches,
+        n = touches.length, i, gesture;
 
     for (i = 0; i < n; ++i) {
-      if (gesture = gestures[touches$$1[i].identifier]) {
+      if (gesture = gestures[touches[i].identifier]) {
         noevent();
         gesture("drag");
       }
@@ -1931,21 +1933,21 @@ function drag() {
   }
 
   function touchended() {
-    var touches$$1 = exports.event.changedTouches,
-        n = touches$$1.length, i, gesture;
+    var touches = exports.event.changedTouches,
+        n = touches.length, i, gesture;
 
     if (touchending) clearTimeout(touchending);
     touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed!
     for (i = 0; i < n; ++i) {
-      if (gesture = gestures[touches$$1[i].identifier]) {
+      if (gesture = gestures[touches[i].identifier]) {
         nopropagation();
         gesture("end");
       }
     }
   }
 
-  function beforestart(id, container, point$$1, that, args) {
-    var p = point$$1(container, id), s, dx, dy,
+  function beforestart(id, container, point, that, args) {
+    var p = point(container, id), s, dx, dy,
         sublisteners = listeners.copy();
 
     if (!customEvent(new DragEvent(drag, "beforestart", s, id, active, p[0], p[1], 0, 0, sublisteners), function() {
@@ -1960,7 +1962,7 @@ function drag() {
       switch (type) {
         case "start": gestures[id] = gesture, n = active++; break;
         case "end": delete gestures[id], --active; // nobreak
-        case "drag": p = point$$1(container, id), n = active; break;
+        case "drag": p = point(container, id), n = active; break;
       }
       customEvent(new DragEvent(drag, type, s, id, n, p[0] + dx, p[1] + dy, p[0] - p0[0], p[1] - p0[1], sublisteners), sublisteners.apply, sublisteners, [type, that, args]);
     };
@@ -2013,8 +2015,7 @@ var brighter = 1 / darker;
 var reI = "\\s*([+-]?\\d+)\\s*",
     reN = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)\\s*",
     reP = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)%\\s*",
-    reHex3 = /^#([0-9a-f]{3})$/,
-    reHex6 = /^#([0-9a-f]{6})$/,
+    reHex = /^#([0-9a-f]{3,8})$/,
     reRgbInteger = new RegExp("^rgb\\(" + [reI, reI, reI] + "\\)$"),
     reRgbPercent = new RegExp("^rgb\\(" + [reP, reP, reP] + "\\)$"),
     reRgbaInteger = new RegExp("^rgba\\(" + [reI, reI, reI, reN] + "\\)$"),
@@ -2174,29 +2175,46 @@ var named = {
 };
 
 define(Color, color, {
+  copy: function(channels) {
+    return Object.assign(new this.constructor, this, channels);
+  },
   displayable: function() {
     return this.rgb().displayable();
   },
-  hex: function() {
-    return this.rgb().hex();
-  },
-  toString: function() {
-    return this.rgb() + "";
-  }
+  hex: color_formatHex, // Deprecated! Use color.formatHex.
+  formatHex: color_formatHex,
+  formatHsl: color_formatHsl,
+  formatRgb: color_formatRgb,
+  toString: color_formatRgb
 });
 
+function color_formatHex() {
+  return this.rgb().formatHex();
+}
+
+function color_formatHsl() {
+  return hslConvert(this).formatHsl();
+}
+
+function color_formatRgb() {
+  return this.rgb().formatRgb();
+}
+
 function color(format) {
-  var m;
+  var m, l;
   format = (format + "").trim().toLowerCase();
-  return (m = reHex3.exec(format)) ? (m = parseInt(m[1], 16), new Rgb((m >> 8 & 0xf) | (m >> 4 & 0x0f0), (m >> 4 & 0xf) | (m & 0xf0), ((m & 0xf) << 4) | (m & 0xf), 1)) // #f00
-      : (m = reHex6.exec(format)) ? rgbn(parseInt(m[1], 16)) // #ff0000
+  return (m = reHex.exec(format)) ? (l = m[1].length, m = parseInt(m[1], 16), l === 6 ? rgbn(m) // #ff0000
+      : l === 3 ? new Rgb((m >> 8 & 0xf) | (m >> 4 & 0xf0), (m >> 4 & 0xf) | (m & 0xf0), ((m & 0xf) << 4) | (m & 0xf), 1) // #f00
+      : l === 8 ? rgba(m >> 24 & 0xff, m >> 16 & 0xff, m >> 8 & 0xff, (m & 0xff) / 0xff) // #ff000000
+      : l === 4 ? rgba((m >> 12 & 0xf) | (m >> 8 & 0xf0), (m >> 8 & 0xf) | (m >> 4 & 0xf0), (m >> 4 & 0xf) | (m & 0xf0), (((m & 0xf) << 4) | (m & 0xf)) / 0xff) // #f000
+      : null) // invalid hex
       : (m = reRgbInteger.exec(format)) ? new Rgb(m[1], m[2], m[3], 1) // rgb(255, 0, 0)
       : (m = reRgbPercent.exec(format)) ? new Rgb(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, 1) // rgb(100%, 0%, 0%)
       : (m = reRgbaInteger.exec(format)) ? rgba(m[1], m[2], m[3], m[4]) // rgba(255, 0, 0, 1)
       : (m = reRgbaPercent.exec(format)) ? rgba(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, m[4]) // rgb(100%, 0%, 0%, 1)
       : (m = reHslPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, 1) // hsl(120, 50%, 50%)
       : (m = reHslaPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, m[4]) // hsla(120, 50%, 50%, 1)
-      : named.hasOwnProperty(format) ? rgbn(named[format])
+      : named.hasOwnProperty(format) ? rgbn(named[format]) // eslint-disable-line no-prototype-builtins
       : format === "transparent" ? new Rgb(NaN, NaN, NaN, 0)
       : null;
 }
@@ -2241,24 +2259,30 @@ define(Rgb, rgb, extend(Color, {
     return this;
   },
   displayable: function() {
-    return (0 <= this.r && this.r <= 255)
-        && (0 <= this.g && this.g <= 255)
-        && (0 <= this.b && this.b <= 255)
+    return (-0.5 <= this.r && this.r < 255.5)
+        && (-0.5 <= this.g && this.g < 255.5)
+        && (-0.5 <= this.b && this.b < 255.5)
         && (0 <= this.opacity && this.opacity <= 1);
   },
-  hex: function() {
-    return "#" + hex(this.r) + hex(this.g) + hex(this.b);
-  },
-  toString: function() {
-    var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
-    return (a === 1 ? "rgb(" : "rgba(")
-        + Math.max(0, Math.min(255, Math.round(this.r) || 0)) + ", "
-        + Math.max(0, Math.min(255, Math.round(this.g) || 0)) + ", "
-        + Math.max(0, Math.min(255, Math.round(this.b) || 0))
-        + (a === 1 ? ")" : ", " + a + ")");
-  }
+  hex: rgb_formatHex, // Deprecated! Use color.formatHex.
+  formatHex: rgb_formatHex,
+  formatRgb: rgb_formatRgb,
+  toString: rgb_formatRgb
 }));
 
+function rgb_formatHex() {
+  return "#" + hex(this.r) + hex(this.g) + hex(this.b);
+}
+
+function rgb_formatRgb() {
+  var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
+  return (a === 1 ? "rgb(" : "rgba(")
+      + Math.max(0, Math.min(255, Math.round(this.r) || 0)) + ", "
+      + Math.max(0, Math.min(255, Math.round(this.g) || 0)) + ", "
+      + Math.max(0, Math.min(255, Math.round(this.b) || 0))
+      + (a === 1 ? ")" : ", " + a + ")");
+}
+
 function hex(value) {
   value = Math.max(0, Math.min(255, Math.round(value) || 0));
   return (value < 16 ? "0" : "") + value.toString(16);
@@ -2334,6 +2358,14 @@ define(Hsl, hsl, extend(Color, {
     return (0 <= this.s && this.s <= 1 || isNaN(this.s))
         && (0 <= this.l && this.l <= 1)
         && (0 <= this.opacity && this.opacity <= 1);
+  },
+  formatHsl: function() {
+    var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
+    return (a === 1 ? "hsl(" : "hsla(")
+        + (this.h || 0) + ", "
+        + (this.s || 0) * 100 + "%, "
+        + (this.l || 0) * 100 + "%"
+        + (a === 1 ? ")" : ", " + a + ")");
   }
 }));
 
@@ -2348,7 +2380,7 @@ function hsl2rgb(h, m1, m2) {
 var deg2rad = Math.PI / 180;
 var rad2deg = 180 / Math.PI;
 
-// https://beta.observablehq.com/@mbostock/lab-and-rgb
+// https://observablehq.com/@mbostock/lab-and-rgb
 var K = 18,
     Xn = 0.96422,
     Yn = 1,
@@ -2360,11 +2392,7 @@ var K = 18,
 
 function labConvert(o) {
   if (o instanceof Lab) return new Lab(o.l, o.a, o.b, o.opacity);
-  if (o instanceof Hcl) {
-    if (isNaN(o.h)) return new Lab(o.l, 0, 0, o.opacity);
-    var h = o.h * deg2rad;
-    return new Lab(o.l, Math.cos(h) * o.c, Math.sin(h) * o.c, o.opacity);
-  }
+  if (o instanceof Hcl) return hcl2lab(o);
   if (!(o instanceof Rgb)) o = rgbConvert(o);
   var r = rgb2lrgb(o.r),
       g = rgb2lrgb(o.g),
@@ -2434,7 +2462,7 @@ function rgb2lrgb(x) {
 function hclConvert(o) {
   if (o instanceof Hcl) return new Hcl(o.h, o.c, o.l, o.opacity);
   if (!(o instanceof Lab)) o = labConvert(o);
-  if (o.a === 0 && o.b === 0) return new Hcl(NaN, 0, o.l, o.opacity);
+  if (o.a === 0 && o.b === 0) return new Hcl(NaN, 0 < o.l && o.l < 100 ? 0 : NaN, o.l, o.opacity);
   var h = Math.atan2(o.b, o.a) * rad2deg;
   return new Hcl(h < 0 ? h + 360 : h, Math.sqrt(o.a * o.a + o.b * o.b), o.l, o.opacity);
 }
@@ -2454,6 +2482,12 @@ function Hcl(h, c, l, opacity) {
   this.opacity = +opacity;
 }
 
+function hcl2lab(o) {
+  if (isNaN(o.h)) return new Lab(o.l, 0, 0, o.opacity);
+  var h = o.h * deg2rad;
+  return new Lab(o.l, Math.cos(h) * o.c, Math.sin(h) * o.c, o.opacity);
+}
+
 define(Hcl, hcl, extend(Color, {
   brighter: function(k) {
     return new Hcl(this.h, this.c, this.l + K * (k == null ? 1 : k), this.opacity);
@@ -2462,7 +2496,7 @@ define(Hcl, hcl, extend(Color, {
     return new Hcl(this.h, this.c, this.l - K * (k == null ? 1 : k), this.opacity);
   },
   rgb: function() {
-    return labConvert(this).rgb();
+    return hcl2lab(this).rgb();
   }
 }));
 
@@ -2591,12 +2625,12 @@ function nogamma(a, b) {
 }
 
 var interpolateRgb = (function rgbGamma(y) {
-  var color$$1 = gamma(y);
+  var color = gamma(y);
 
-  function rgb$$1(start, end) {
-    var r = color$$1((start = rgb(start)).r, (end = rgb(end)).r),
-        g = color$$1(start.g, end.g),
-        b = color$$1(start.b, end.b),
+  function rgb$1(start, end) {
+    var r = color((start = rgb(start)).r, (end = rgb(end)).r),
+        g = color(start.g, end.g),
+        b = color(start.b, end.b),
         opacity = nogamma(start.opacity, end.opacity);
     return function(t) {
       start.r = r(t);
@@ -2607,9 +2641,9 @@ var interpolateRgb = (function rgbGamma(y) {
     };
   }
 
-  rgb$$1.gamma = rgbGamma;
+  rgb$1.gamma = rgbGamma;
 
-  return rgb$$1;
+  return rgb$1;
 })(1);
 
 function rgbSpline(spline) {
@@ -2618,22 +2652,22 @@ function rgbSpline(spline) {
         r = new Array(n),
         g = new Array(n),
         b = new Array(n),
-        i, color$$1;
+        i, color;
     for (i = 0; i < n; ++i) {
-      color$$1 = rgb(colors[i]);
-      r[i] = color$$1.r || 0;
-      g[i] = color$$1.g || 0;
-      b[i] = color$$1.b || 0;
+      color = rgb(colors[i]);
+      r[i] = color.r || 0;
+      g[i] = color.g || 0;
+      b[i] = color.b || 0;
     }
     r = spline(r);
     g = spline(g);
     b = spline(b);
-    color$$1.opacity = 1;
+    color.opacity = 1;
     return function(t) {
-      color$$1.r = r(t);
-      color$$1.g = g(t);
-      color$$1.b = b(t);
-      return color$$1 + "";
+      color.r = r(t);
+      color.g = g(t);
+      color.b = b(t);
+      return color + "";
     };
   };
 }
@@ -2641,7 +2675,26 @@ function rgbSpline(spline) {
 var rgbBasis = rgbSpline(basis$1);
 var rgbBasisClosed = rgbSpline(basisClosed);
 
+function numberArray(a, b) {
+  if (!b) b = [];
+  var n = a ? Math.min(b.length, a.length) : 0,
+      c = b.slice(),
+      i;
+  return function(t) {
+    for (i = 0; i < n; ++i) c[i] = a[i] * (1 - t) + b[i] * t;
+    return c;
+  };
+}
+
+function isNumberArray(x) {
+  return ArrayBuffer.isView(x) && !(x instanceof DataView);
+}
+
 function array$1(a, b) {
+  return (isNumberArray(b) ? numberArray : genericArray)(a, b);
+}
+
+function genericArray(a, b) {
   var nb = b ? b.length : 0,
       na = a ? Math.min(nb, a.length) : 0,
       x = new Array(na),
@@ -2659,14 +2712,14 @@ function array$1(a, b) {
 
 function date(a, b) {
   var d = new Date;
-  return a = +a, b -= a, function(t) {
-    return d.setTime(a + b * t), d;
+  return a = +a, b = +b, function(t) {
+    return d.setTime(a * (1 - t) + b * t), d;
   };
 }
 
 function interpolateNumber(a, b) {
-  return a = +a, b -= a, function(t) {
-    return a + b * t;
+  return a = +a, b = +b, function(t) {
+    return a * (1 - t) + b * t;
   };
 }
 
@@ -2762,7 +2815,8 @@ function interpolateValue(a, b) {
       : t === "string" ? ((c = color(b)) ? (b = c, interpolateRgb) : interpolateString)
       : b instanceof color ? interpolateRgb
       : b instanceof Date ? date
-      : Array.isArray(b) ? array$1
+      : isNumberArray(b) ? numberArray
+      : Array.isArray(b) ? genericArray
       : typeof b.valueOf !== "function" && typeof b.toString !== "function" || isNaN(b) ? object
       : interpolateNumber)(a, b);
 }
@@ -2783,8 +2837,8 @@ function hue$1(a, b) {
 }
 
 function interpolateRound(a, b) {
-  return a = +a, b -= a, function(t) {
-    return Math.round(a + b * t);
+  return a = +a, b = +b, function(t) {
+    return Math.round(a * (1 - t) + b * t);
   };
 }
 
@@ -2965,9 +3019,9 @@ function interpolateZoom(p0, p1) {
   return i;
 }
 
-function hsl$1(hue$$1) {
+function hsl$1(hue) {
   return function(start, end) {
-    var h = hue$$1((start = hsl(start)).h, (end = hsl(end)).h),
+    var h = hue((start = hsl(start)).h, (end = hsl(end)).h),
         s = nogamma(start.s, end.s),
         l = nogamma(start.l, end.l),
         opacity = nogamma(start.opacity, end.opacity);
@@ -2998,9 +3052,9 @@ function lab$1(start, end) {
   };
 }
 
-function hcl$1(hue$$1) {
+function hcl$1(hue) {
   return function(start, end) {
-    var h = hue$$1((start = hcl(start)).h, (end = hcl(end)).h),
+    var h = hue((start = hcl(start)).h, (end = hcl(end)).h),
         c = nogamma(start.c, end.c),
         l = nogamma(start.l, end.l),
         opacity = nogamma(start.opacity, end.opacity);
@@ -3017,12 +3071,12 @@ function hcl$1(hue$$1) {
 var hcl$2 = hcl$1(hue);
 var hclLong = hcl$1(nogamma);
 
-function cubehelix$1(hue$$1) {
+function cubehelix$1(hue) {
   return (function cubehelixGamma(y) {
     y = +y;
 
-    function cubehelix$$1(start, end) {
-      var h = hue$$1((start = cubehelix(start)).h, (end = cubehelix(end)).h),
+    function cubehelix$1(start, end) {
+      var h = hue((start = cubehelix(start)).h, (end = cubehelix(end)).h),
           s = nogamma(start.s, end.s),
           l = nogamma(start.l, end.l),
           opacity = nogamma(start.opacity, end.opacity);
@@ -3035,9 +3089,9 @@ function cubehelix$1(hue$$1) {
       };
     }
 
-    cubehelix$$1.gamma = cubehelixGamma;
+    cubehelix$1.gamma = cubehelixGamma;
 
-    return cubehelix$$1;
+    return cubehelix$1;
   })(1);
 }
 
@@ -3345,7 +3399,7 @@ function create$1(node, id, self) {
 
 function interrupt(node, name) {
   var schedules = node.__transition,
-      schedule$$1,
+      schedule,
       active,
       empty = true,
       i;
@@ -3355,11 +3409,11 @@ function interrupt(node, name) {
   name = name == null ? null : name + "";
 
   for (i in schedules) {
-    if ((schedule$$1 = schedules[i]).name !== name) { empty = false; continue; }
-    active = schedule$$1.state > STARTING && schedule$$1.state < ENDING;
-    schedule$$1.state = ENDED;
-    schedule$$1.timer.stop();
-    schedule$$1.on.call(active ? "interrupt" : "cancel", node, node.__data__, schedule$$1.index, schedule$$1.group);
+    if ((schedule = schedules[i]).name !== name) { empty = false; continue; }
+    active = schedule.state > STARTING && schedule.state < ENDING;
+    schedule.state = ENDED;
+    schedule.timer.stop();
+    schedule.on.call(active ? "interrupt" : "cancel", node, node.__data__, schedule.index, schedule.group);
     delete schedules[i];
   }
 
@@ -3375,8 +3429,8 @@ function selection_interrupt(name) {
 function tweenRemove(id, name) {
   var tween0, tween1;
   return function() {
-    var schedule$$1 = set$1(this, id),
-        tween = schedule$$1.tween;
+    var schedule = set$1(this, id),
+        tween = schedule.tween;
 
     // If this node shared tween with the previous node,
     // just assign the updated shared tween and we’re done!
@@ -3392,7 +3446,7 @@ function tweenRemove(id, name) {
       }
     }
 
-    schedule$$1.tween = tween1;
+    schedule.tween = tween1;
   };
 }
 
@@ -3400,8 +3454,8 @@ function tweenFunction(id, name, value) {
   var tween0, tween1;
   if (typeof value !== "function") throw new Error;
   return function() {
-    var schedule$$1 = set$1(this, id),
-        tween = schedule$$1.tween;
+    var schedule = set$1(this, id),
+        tween = schedule.tween;
 
     // If this node shared tween with the previous node,
     // just assign the updated shared tween and we’re done!
@@ -3417,7 +3471,7 @@ function tweenFunction(id, name, value) {
       if (i === n) tween1.push(t);
     }
 
-    schedule$$1.tween = tween1;
+    schedule.tween = tween1;
   };
 }
 
@@ -3443,8 +3497,8 @@ function tweenValue(transition, name, value) {
   var id = transition._id;
 
   transition.each(function() {
-    var schedule$$1 = set$1(this, id);
-    (schedule$$1.value || (schedule$$1.value = {}))[name] = value.apply(this, arguments);
+    var schedule = set$1(this, id);
+    (schedule.value || (schedule.value = {}))[name] = value.apply(this, arguments);
   });
 
   return function(node) {
@@ -3472,7 +3526,7 @@ function attrRemoveNS$1(fullname) {
   };
 }
 
-function attrConstant$1(name, interpolate$$1, value1) {
+function attrConstant$1(name, interpolate, value1) {
   var string00,
       string1 = value1 + "",
       interpolate0;
@@ -3480,11 +3534,11 @@ function attrConstant$1(name, interpolate$$1, value1) {
     var string0 = this.getAttribute(name);
     return string0 === string1 ? null
         : string0 === string00 ? interpolate0
-        : interpolate0 = interpolate$$1(string00 = string0, value1);
+        : interpolate0 = interpolate(string00 = string0, value1);
   };
 }
 
-function attrConstantNS$1(fullname, interpolate$$1, value1) {
+function attrConstantNS$1(fullname, interpolate, value1) {
   var string00,
       string1 = value1 + "",
       interpolate0;
@@ -3492,11 +3546,11 @@ function attrConstantNS$1(fullname, interpolate$$1, value1) {
     var string0 = this.getAttributeNS(fullname.space, fullname.local);
     return string0 === string1 ? null
         : string0 === string00 ? interpolate0
-        : interpolate0 = interpolate$$1(string00 = string0, value1);
+        : interpolate0 = interpolate(string00 = string0, value1);
   };
 }
 
-function attrFunction$1(name, interpolate$$1, value) {
+function attrFunction$1(name, interpolate, value) {
   var string00,
       string10,
       interpolate0;
@@ -3507,11 +3561,11 @@ function attrFunction$1(name, interpolate$$1, value) {
     string1 = value1 + "";
     return string0 === string1 ? null
         : string0 === string00 && string1 === string10 ? interpolate0
-        : (string10 = string1, interpolate0 = interpolate$$1(string00 = string0, value1));
+        : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
   };
 }
 
-function attrFunctionNS$1(fullname, interpolate$$1, value) {
+function attrFunctionNS$1(fullname, interpolate, value) {
   var string00,
       string10,
       interpolate0;
@@ -3522,7 +3576,7 @@ function attrFunctionNS$1(fullname, interpolate$$1, value) {
     string1 = value1 + "";
     return string0 === string1 ? null
         : string0 === string00 && string1 === string10 ? interpolate0
-        : (string10 = string1, interpolate0 = interpolate$$1(string00 = string0, value1));
+        : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
   };
 }
 
@@ -3536,13 +3590,13 @@ function transition_attr(name, value) {
 
 function attrInterpolate(name, i) {
   return function(t) {
-    this.setAttribute(name, i(t));
+    this.setAttribute(name, i.call(this, t));
   };
 }
 
 function attrInterpolateNS(fullname, i) {
   return function(t) {
-    this.setAttributeNS(fullname.space, fullname.local, i(t));
+    this.setAttributeNS(fullname.space, fullname.local, i.call(this, t));
   };
 }
 
@@ -3650,10 +3704,10 @@ function transition_filter(match) {
   return new Transition(subgroups, this._parents, this._name, this._id);
 }
 
-function transition_merge(transition$$1) {
-  if (transition$$1._id !== this._id) throw new Error;
+function transition_merge(transition) {
+  if (transition._id !== this._id) throw new Error;
 
-  for (var groups0 = this._groups, groups1 = transition$$1._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
+  for (var groups0 = this._groups, groups1 = transition._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
     for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
       if (node = group0[i] || group1[i]) {
         merge[i] = node;
@@ -3679,15 +3733,15 @@ function start(name) {
 function onFunction(id, name, listener) {
   var on0, on1, sit = start(name) ? init : set$1;
   return function() {
-    var schedule$$1 = sit(this, id),
-        on = schedule$$1.on;
+    var schedule = sit(this, id),
+        on = schedule.on;
 
     // If this node shared a dispatch with the previous node,
     // just assign the updated shared dispatch and we’re done!
     // Otherwise, copy-on-write.
     if (on !== on0) (on1 = (on0 = on).copy()).on(name, listener);
 
-    schedule$$1.on = on1;
+    schedule.on = on1;
   };
 }
 
@@ -3711,15 +3765,15 @@ function transition_remove() {
   return this.on("end.remove", removeFunction(this._id));
 }
 
-function transition_select(select$$1) {
+function transition_select(select) {
   var name = this._name,
       id = this._id;
 
-  if (typeof select$$1 !== "function") select$$1 = selector(select$$1);
+  if (typeof select !== "function") select = selector(select);
 
   for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
     for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
-      if ((node = group[i]) && (subnode = select$$1.call(node, node.__data__, i, group))) {
+      if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
         if ("__data__" in node) subnode.__data__ = node.__data__;
         subgroup[i] = subnode;
         schedule(subgroup[i], name, id, i, subgroup, get$1(node, id));
@@ -3730,16 +3784,16 @@ function transition_select(select$$1) {
   return new Transition(subgroups, this._parents, name, id);
 }
 
-function transition_selectAll(select$$1) {
+function transition_selectAll(select) {
   var name = this._name,
       id = this._id;
 
-  if (typeof select$$1 !== "function") select$$1 = selectorAll(select$$1);
+  if (typeof select !== "function") select = selectorAll(select);
 
   for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
     for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
       if (node = group[i]) {
-        for (var children = select$$1.call(node, node.__data__, i, group), child, inherit = get$1(node, id), k = 0, l = children.length; k < l; ++k) {
+        for (var children = select.call(node, node.__data__, i, group), child, inherit = get$1(node, id), k = 0, l = children.length; k < l; ++k) {
           if (child = children[k]) {
             schedule(child, name, id, k, children, inherit);
           }
@@ -3759,7 +3813,7 @@ function transition_selection() {
   return new Selection$1(this._groups, this._parents);
 }
 
-function styleNull(name, interpolate$$1) {
+function styleNull(name, interpolate) {
   var string00,
       string10,
       interpolate0;
@@ -3768,7 +3822,7 @@ function styleNull(name, interpolate$$1) {
         string1 = (this.style.removeProperty(name), styleValue(this, name));
     return string0 === string1 ? null
         : string0 === string00 && string1 === string10 ? interpolate0
-        : interpolate0 = interpolate$$1(string00 = string0, string10 = string1);
+        : interpolate0 = interpolate(string00 = string0, string10 = string1);
   };
 }
 
@@ -3778,7 +3832,7 @@ function styleRemove$1(name) {
   };
 }
 
-function styleConstant$1(name, interpolate$$1, value1) {
+function styleConstant$1(name, interpolate, value1) {
   var string00,
       string1 = value1 + "",
       interpolate0;
@@ -3786,11 +3840,11 @@ function styleConstant$1(name, interpolate$$1, value1) {
     var string0 = styleValue(this, name);
     return string0 === string1 ? null
         : string0 === string00 ? interpolate0
-        : interpolate0 = interpolate$$1(string00 = string0, value1);
+        : interpolate0 = interpolate(string00 = string0, value1);
   };
 }
 
-function styleFunction$1(name, interpolate$$1, value) {
+function styleFunction$1(name, interpolate, value) {
   var string00,
       string10,
       interpolate0;
@@ -3801,23 +3855,23 @@ function styleFunction$1(name, interpolate$$1, value) {
     if (value1 == null) string1 = value1 = (this.style.removeProperty(name), styleValue(this, name));
     return string0 === string1 ? null
         : string0 === string00 && string1 === string10 ? interpolate0
-        : (string10 = string1, interpolate0 = interpolate$$1(string00 = string0, value1));
+        : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
   };
 }
 
 function styleMaybeRemove(id, name) {
   var on0, on1, listener0, key = "style." + name, event = "end." + key, remove;
   return function() {
-    var schedule$$1 = set$1(this, id),
-        on = schedule$$1.on,
-        listener = schedule$$1.value[key] == null ? remove || (remove = styleRemove$1(name)) : undefined;
+    var schedule = set$1(this, id),
+        on = schedule.on,
+        listener = schedule.value[key] == null ? remove || (remove = styleRemove$1(name)) : undefined;
 
     // If this node shared a dispatch with the previous node,
     // just assign the updated shared dispatch and we’re done!
     // Otherwise, copy-on-write.
     if (on !== on0 || listener0 !== listener) (on1 = (on0 = on).copy()).on(event, listener0 = listener);
 
-    schedule$$1.on = on1;
+    schedule.on = on1;
   };
 }
 
@@ -3836,7 +3890,7 @@ function transition_style(name, value, priority) {
 
 function styleInterpolate(name, i, priority) {
   return function(t) {
-    this.style.setProperty(name, i(t), priority);
+    this.style.setProperty(name, i.call(this, t), priority);
   };
 }
 
@@ -3878,6 +3932,31 @@ function transition_text(value) {
       : textConstant$1(value == null ? "" : value + ""));
 }
 
+function textInterpolate(i) {
+  return function(t) {
+    this.textContent = i.call(this, t);
+  };
+}
+
+function textTween(value) {
+  var t0, i0;
+  function tween() {
+    var i = value.apply(this, arguments);
+    if (i !== i0) t0 = (i0 = i) && textInterpolate(i);
+    return t0;
+  }
+  tween._value = value;
+  return tween;
+}
+
+function transition_textTween(value) {
+  var key = "text";
+  if (arguments.length < 1) return (key = this.tween(key)) && key._value;
+  if (value == null) return this.tween(key, null);
+  if (typeof value !== "function") throw new Error;
+  return this.tween(key, textTween(value));
+}
+
 function transition_transition() {
   var name = this._name,
       id0 = this._id,
@@ -3907,8 +3986,8 @@ function transition_end() {
         end = {value: function() { if (--size === 0) resolve(); }};
 
     that.each(function() {
-      var schedule$$1 = set$1(this, id),
-          on = schedule$$1.on;
+      var schedule = set$1(this, id),
+          on = schedule.on;
 
       // If this node shared a dispatch with the previous node,
       // just assign the updated shared dispatch and we’re done!
@@ -3920,7 +3999,7 @@ function transition_end() {
         on1._.end.push(end);
       }
 
-      schedule$$1.on = on1;
+      schedule.on = on1;
     });
   });
 }
@@ -3964,6 +4043,7 @@ Transition.prototype = transition.prototype = {
   style: transition_style,
   styleTween: transition_styleTween,
   text: transition_text,
+  textTween: transition_textTween,
   remove: transition_remove,
   tween: transition_tween,
   delay: transition_delay,
@@ -4228,13 +4308,13 @@ var root$1 = [null];
 
 function active(node, name) {
   var schedules = node.__transition,
-      schedule$$1,
+      schedule,
       i;
 
   if (schedules) {
     name = name == null ? null : name + "";
     for (i in schedules) {
-      if ((schedule$$1 = schedules[i]).state > SCHEDULED && schedule$$1.name === name) {
+      if ((schedule = schedules[i]).state > SCHEDULED && schedule.name === name) {
         return new Transition([[node]], root$1, name, +i);
       }
     }
@@ -4269,24 +4349,38 @@ var MODE_DRAG = {name: "drag"},
     MODE_HANDLE = {name: "handle"},
     MODE_CENTER = {name: "center"};
 
+function number1(e) {
+  return [+e[0], +e[1]];
+}
+
+function number2(e) {
+  return [number1(e[0]), number1(e[1])];
+}
+
+function toucher(identifier) {
+  return function(target) {
+    return touch(target, exports.event.touches, identifier);
+  };
+}
+
 var X = {
   name: "x",
-  handles: ["e", "w"].map(type),
-  input: function(x, e) { return x && [[x[0], e[0][1]], [x[1], e[1][1]]]; },
+  handles: ["w", "e"].map(type),
+  input: function(x, e) { return x == null ? null : [[+x[0], e[0][1]], [+x[1], e[1][1]]]; },
   output: function(xy) { return xy && [xy[0][0], xy[1][0]]; }
 };
 
 var Y = {
   name: "y",
   handles: ["n", "s"].map(type),
-  input: function(y, e) { return y && [[e[0][0], y[0]], [e[1][0], y[1]]]; },
+  input: function(y, e) { return y == null ? null : [[e[0][0], +y[0]], [e[1][0], +y[1]]]; },
   output: function(xy) { return xy && [xy[0][1], xy[1][1]]; }
 };
 
 var XY = {
   name: "xy",
-  handles: ["n", "e", "s", "w", "nw", "ne", "se", "sw"].map(type),
-  input: function(xy) { return xy; },
+  handles: ["n", "w", "e", "s", "nw", "ne", "sw", "se"].map(type),
+  input: function(xy) { return xy == null ? null : number2(xy); },
   output: function(xy) { return xy; }
 };
 
@@ -4353,14 +4447,22 @@ function type(t) {
 
 // Ignore right-click, since that should open the context menu.
 function defaultFilter$1() {
-  return !exports.event.button;
+  return !exports.event.ctrlKey && !exports.event.button;
 }
 
 function defaultExtent() {
   var svg = this.ownerSVGElement || this;
+  if (svg.hasAttribute("viewBox")) {
+    svg = svg.viewBox.baseVal;
+    return [[svg.x, svg.y], [svg.x + svg.width, svg.y + svg.height]];
+  }
   return [[0, 0], [svg.width.baseVal.value, svg.height.baseVal.value]];
 }
 
+function defaultTouchable$1() {
+  return navigator.maxTouchPoints || ("ontouchstart" in this);
+}
+
 // Like d3.local, but with the name “__brush” rather than auto-generated.
 function local$1(node) {
   while (!node.__brush) if (!(node = node.parentNode)) return;
@@ -4392,7 +4494,9 @@ function brush() {
 function brush$1(dim) {
   var extent = defaultExtent,
       filter = defaultFilter$1,
-      listeners = dispatch(brush, "start", "brush", "end"),
+      touchable = defaultTouchable$1,
+      keys = true,
+      listeners = dispatch("start", "brush", "end"),
       handleSize = 6,
       touchending;
 
@@ -4439,11 +4543,16 @@ function brush$1(dim) {
         .each(redraw)
         .attr("fill", "none")
         .attr("pointer-events", "all")
-        .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)")
-        .on("mousedown.brush touchstart.brush", started);
+        .on("mousedown.brush", started)
+      .filter(touchable)
+        .on("touchstart.brush", started)
+        .on("touchmove.brush", touchmoved)
+        .on("touchend.brush touchcancel.brush", touchended)
+        .style("touch-action", "none")
+        .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
   }
 
-  brush.move = function(group, selection$$1) {
+  brush.move = function(group, selection) {
     if (group.selection) {
       group
           .on("start.brush", function() { emitter(this, arguments).beforestart().start(); })
@@ -4453,16 +4562,16 @@ function brush$1(dim) {
                 state = that.__brush,
                 emit = emitter(that, arguments),
                 selection0 = state.selection,
-                selection1 = dim.input(typeof selection$$1 === "function" ? selection$$1.apply(this, arguments) : selection$$1, state.extent),
+                selection1 = dim.input(typeof selection === "function" ? selection.apply(this, arguments) : selection, state.extent),
                 i = interpolateValue(selection0, selection1);
 
             function tween(t) {
-              state.selection = t === 1 && empty$1(selection1) ? null : i(t);
+              state.selection = t === 1 && selection1 === null ? null : i(t);
               redraw.call(that);
               emit.brush();
             }
 
-            return selection0 && selection1 ? tween : tween(1);
+            return selection0 !== null && selection1 !== null ? tween : tween(1);
           });
     } else {
       group
@@ -4470,35 +4579,39 @@ function brush$1(dim) {
             var that = this,
                 args = arguments,
                 state = that.__brush,
-                selection1 = dim.input(typeof selection$$1 === "function" ? selection$$1.apply(that, args) : selection$$1, state.extent),
+                selection1 = dim.input(typeof selection === "function" ? selection.apply(that, args) : selection, state.extent),
                 emit = emitter(that, args).beforestart();
 
             interrupt(that);
-            state.selection = selection1 == null || empty$1(selection1) ? null : selection1;
+            state.selection = selection1 === null ? null : selection1;
             redraw.call(that);
             emit.start().brush().end();
           });
     }
   };
 
+  brush.clear = function(group) {
+    brush.move(group, null);
+  };
+
   function redraw() {
     var group = select(this),
-        selection$$1 = local$1(this).selection;
+        selection = local$1(this).selection;
 
-    if (selection$$1) {
+    if (selection) {
       group.selectAll(".selection")
           .style("display", null)
-          .attr("x", selection$$1[0][0])
-          .attr("y", selection$$1[0][1])
-          .attr("width", selection$$1[1][0] - selection$$1[0][0])
-          .attr("height", selection$$1[1][1] - selection$$1[0][1]);
+          .attr("x", selection[0][0])
+          .attr("y", selection[0][1])
+          .attr("width", selection[1][0] - selection[0][0])
+          .attr("height", selection[1][1] - selection[0][1]);
 
       group.selectAll(".handle")
           .style("display", null)
-          .attr("x", function(d) { return d.type[d.type.length - 1] === "e" ? selection$$1[1][0] - handleSize / 2 : selection$$1[0][0] - handleSize / 2; })
-          .attr("y", function(d) { return d.type[0] === "s" ? selection$$1[1][1] - handleSize / 2 : selection$$1[0][1] - handleSize / 2; })
-          .attr("width", function(d) { return d.type === "n" || d.type === "s" ? selection$$1[1][0] - selection$$1[0][0] + handleSize : handleSize; })
-          .attr("height", function(d) { return d.type === "e" || d.type === "w" ? selection$$1[1][1] - selection$$1[0][1] + handleSize : handleSize; });
+          .attr("x", function(d) { return d.type[d.type.length - 1] === "e" ? selection[1][0] - handleSize / 2 : selection[0][0] - handleSize / 2; })
+          .attr("y", function(d) { return d.type[0] === "s" ? selection[1][1] - handleSize / 2 : selection[0][1] - handleSize / 2; })
+          .attr("width", function(d) { return d.type === "n" || d.type === "s" ? selection[1][0] - selection[0][0] + handleSize : handleSize; })
+          .attr("height", function(d) { return d.type === "e" || d.type === "w" ? selection[1][1] - selection[0][1] + handleSize : handleSize; });
     }
 
     else {
@@ -4511,8 +4624,8 @@ function brush$1(dim) {
     }
   }
 
-  function emitter(that, args) {
-    return that.__brush.emitter || new Emitter(that, args);
+  function emitter(that, args, clean) {
+    return (!clean && that.__brush.emitter) || new Emitter(that, args);
   }
 
   function Emitter(that, args) {
@@ -4529,6 +4642,7 @@ function brush$1(dim) {
     },
     start: function() {
       if (this.starting) this.starting = false, this.emit("start");
+      else this.emit("brush");
       return this;
     },
     brush: function() {
@@ -4545,42 +4659,43 @@ function brush$1(dim) {
   };
 
   function started() {
-    if (exports.event.touches) { if (exports.event.changedTouches.length < exports.event.touches.length) return noevent$1(); }
-    else if (touchending) return;
+    if (touchending && !exports.event.touches) return;
     if (!filter.apply(this, arguments)) return;
 
     var that = this,
         type = exports.event.target.__data__.type,
-        mode = (exports.event.metaKey ? type = "overlay" : type) === "selection" ? MODE_DRAG : (exports.event.altKey ? MODE_CENTER : MODE_HANDLE),
+        mode = (keys && exports.event.metaKey ? type = "overlay" : type) === "selection" ? MODE_DRAG : (keys && exports.event.altKey ? MODE_CENTER : MODE_HANDLE),
         signX = dim === Y ? null : signsX[type],
         signY = dim === X ? null : signsY[type],
         state = local$1(that),
         extent = state.extent,
-        selection$$1 = state.selection,
+        selection = state.selection,
         W = extent[0][0], w0, w1,
         N = extent[0][1], n0, n1,
         E = extent[1][0], e0, e1,
         S = extent[1][1], s0, s1,
-        dx,
-        dy,
+        dx = 0,
+        dy = 0,
         moving,
-        shifting = signX && signY && exports.event.shiftKey,
+        shifting = signX && signY && keys && exports.event.shiftKey,
         lockX,
         lockY,
-        point0 = mouse(that),
-        point$$1 = point0,
-        emit = emitter(that, arguments).beforestart();
+        pointer = exports.event.touches ? toucher(exports.event.changedTouches[0].identifier) : mouse,
+        point0 = pointer(that),
+        point = point0,
+        emit = emitter(that, arguments, true).beforestart();
 
     if (type === "overlay") {
-      state.selection = selection$$1 = [
+      if (selection) moving = true;
+      state.selection = selection = [
         [w0 = dim === Y ? W : point0[0], n0 = dim === X ? N : point0[1]],
         [e0 = dim === Y ? E : w0, s0 = dim === X ? S : n0]
       ];
     } else {
-      w0 = selection$$1[0][0];
-      n0 = selection$$1[0][1];
-      e0 = selection$$1[1][0];
-      s0 = selection$$1[1][1];
+      w0 = selection[0][0];
+      n0 = selection[0][1];
+      e0 = selection[1][0];
+      s0 = selection[1][1];
     }
 
     w1 = w0;
@@ -4595,15 +4710,15 @@ function brush$1(dim) {
         .attr("cursor", cursors[type]);
 
     if (exports.event.touches) {
-      group
-          .on("touchmove.brush", moved, true)
-          .on("touchend.brush touchcancel.brush", ended, true);
+      emit.moved = moved;
+      emit.ended = ended;
     } else {
       var view = select(exports.event.view)
-          .on("keydown.brush", keydowned, true)
-          .on("keyup.brush", keyupped, true)
           .on("mousemove.brush", moved, true)
           .on("mouseup.brush", ended, true);
+      if (keys) view
+          .on("keydown.brush", keydowned, true)
+          .on("keyup.brush", keyupped, true);
 
       dragDisable(exports.event.view);
     }
@@ -4614,12 +4729,12 @@ function brush$1(dim) {
     emit.start();
 
     function moved() {
-      var point1 = mouse(that);
+      var point1 = pointer(that);
       if (shifting && !lockX && !lockY) {
-        if (Math.abs(point1[0] - point$$1[0]) > Math.abs(point1[1] - point$$1[1])) lockY = true;
+        if (Math.abs(point1[0] - point[0]) > Math.abs(point1[1] - point[1])) lockY = true;
         else lockX = true;
       }
-      point$$1 = point1;
+      point = point1;
       moving = true;
       noevent$1();
       move();
@@ -4628,8 +4743,8 @@ function brush$1(dim) {
     function move() {
       var t;
 
-      dx = point$$1[0] - point0[0];
-      dy = point$$1[1] - point0[1];
+      dx = point[0] - point0[0];
+      dy = point[1] - point0[1];
 
       switch (mode) {
         case MODE_SPACE:
@@ -4666,14 +4781,14 @@ function brush$1(dim) {
         if (type in flipY) overlay.attr("cursor", cursors[type = flipY[type]]);
       }
 
-      if (state.selection) selection$$1 = state.selection; // May be set by brush.move!
-      if (lockX) w1 = selection$$1[0][0], e1 = selection$$1[1][0];
-      if (lockY) n1 = selection$$1[0][1], s1 = selection$$1[1][1];
+      if (state.selection) selection = state.selection; // May be set by brush.move!
+      if (lockX) w1 = selection[0][0], e1 = selection[1][0];
+      if (lockY) n1 = selection[0][1], s1 = selection[1][1];
 
-      if (selection$$1[0][0] !== w1
-          || selection$$1[0][1] !== n1
-          || selection$$1[1][0] !== e1
-          || selection$$1[1][1] !== s1) {
+      if (selection[0][0] !== w1
+          || selection[0][1] !== n1
+          || selection[1][0] !== e1
+          || selection[1][1] !== s1) {
         state.selection = [[w1, n1], [e1, s1]];
         redraw.call(that);
         emit.brush();
@@ -4686,15 +4801,14 @@ function brush$1(dim) {
         if (exports.event.touches.length) return;
         if (touchending) clearTimeout(touchending);
         touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed!
-        group.on("touchmove.brush touchend.brush touchcancel.brush", null);
       } else {
         yesdrag(exports.event.view, moving);
         view.on("keydown.brush keyup.brush mousemove.brush mouseup.brush", null);
       }
       group.attr("pointer-events", "all");
       overlay.attr("cursor", cursors.overlay);
-      if (state.selection) selection$$1 = state.selection; // May be set by brush.move (on start)!
-      if (empty$1(selection$$1)) state.selection = null, redraw.call(that);
+      if (state.selection) selection = state.selection; // May be set by brush.move (on start)!
+      if (empty$1(selection)) state.selection = null, redraw.call(that);
       emit.end();
     }
 
@@ -4768,25 +4882,41 @@ function brush$1(dim) {
     }
   }
 
+  function touchmoved() {
+    emitter(this, arguments).moved();
+  }
+
+  function touchended() {
+    emitter(this, arguments).ended();
+  }
+
   function initialize() {
     var state = this.__brush || {selection: null};
-    state.extent = extent.apply(this, arguments);
+    state.extent = number2(extent.apply(this, arguments));
     state.dim = dim;
     return state;
   }
 
   brush.extent = function(_) {
-    return arguments.length ? (extent = typeof _ === "function" ? _ : constant$4([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), brush) : extent;
+    return arguments.length ? (extent = typeof _ === "function" ? _ : constant$4(number2(_)), brush) : extent;
   };
 
   brush.filter = function(_) {
     return arguments.length ? (filter = typeof _ === "function" ? _ : constant$4(!!_), brush) : filter;
   };
 
+  brush.touchable = function(_) {
+    return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$4(!!_), brush) : touchable;
+  };
+
   brush.handleSize = function(_) {
     return arguments.length ? (handleSize = +_, brush) : handleSize;
   };
 
+  brush.keyModifiers = function(_) {
+    return arguments.length ? (keys = !!_, brush) : keys;
+  };
+
   brush.on = function() {
     var value = listeners.on.apply(listeners, arguments);
     return value === listeners ? brush : value;
@@ -5013,7 +5143,7 @@ Path.prototype = path.prototype = {
     }
   },
   arc: function(x, y, r, a0, a1, ccw) {
-    x = +x, y = +y, r = +r;
+    x = +x, y = +y, r = +r, ccw = !!ccw;
     var dx = r * Math.cos(a0),
         dy = r * Math.sin(a0),
         x0 = x + dx,
@@ -5413,11 +5543,11 @@ var cases = [
 function contours() {
   var dx = 1,
       dy = 1,
-      threshold$$1 = thresholdSturges,
+      threshold = thresholdSturges,
       smooth = smoothLinear;
 
   function contours(values) {
-    var tz = threshold$$1(values);
+    var tz = threshold(values);
 
     // Convert number of thresholds into uniform thresholds.
     if (!Array.isArray(tz)) {
@@ -5577,7 +5707,7 @@ function contours() {
   };
 
   contours.thresholds = function(_) {
-    return arguments.length ? (threshold$$1 = typeof _ === "function" ? _ : Array.isArray(_) ? constant$6(slice$3.call(_)) : constant$6(_), contours) : threshold$$1;
+    return arguments.length ? (threshold = typeof _ === "function" ? _ : Array.isArray(_) ? constant$6(slice$3.call(_)) : constant$6(_), contours) : threshold;
   };
 
   contours.smooth = function(_) {
@@ -5654,7 +5784,7 @@ function density() {
       o = r * 3, // grid offset, to pad for blur
       n = (dx + o * 2) >> k, // grid width
       m = (dy + o * 2) >> k, // grid height
-      threshold$$1 = constant$6(20);
+      threshold = constant$6(20);
 
   function density(data) {
     var values0 = new Float32Array(n * m),
@@ -5677,7 +5807,7 @@ function density() {
     blurX({width: n, height: m, data: values0}, {width: n, height: m, data: values1}, r >> k);
     blurY({width: n, height: m, data: values1}, {width: n, height: m, data: values0}, r >> k);
 
-    var tz = threshold$$1(values0);
+    var tz = threshold(values0);
 
     // Convert number of thresholds into uniform thresholds.
     if (!Array.isArray(tz)) {
@@ -5747,7 +5877,7 @@ function density() {
   };
 
   density.thresholds = function(_) {
-    return arguments.length ? (threshold$$1 = typeof _ === "function" ? _ : Array.isArray(_) ? constant$6(slice$3.call(_)) : constant$6(_), density) : threshold$$1;
+    return arguments.length ? (threshold = typeof _ === "function" ? _ : Array.isArray(_) ? constant$6(slice$3.call(_)) : constant$6(_), density) : threshold;
   };
 
   density.bandwidth = function(_) {
@@ -5767,7 +5897,7 @@ var EOL = {},
 
 function objectConverter(columns) {
   return new Function("d", "return {" + columns.map(function(name, i) {
-    return JSON.stringify(name) + ": d[" + i + "]";
+    return JSON.stringify(name) + ": d[" + i + "] || \"\"";
   }).join(",") + "}");
 }
 
@@ -5811,7 +5941,7 @@ function formatDate(date) {
       seconds = date.getUTCSeconds(),
       milliseconds = date.getUTCMilliseconds();
   return isNaN(date) ? "Invalid Date"
-      : formatYear(date.getUTCFullYear(), 4) + "-" + pad(date.getUTCMonth() + 1, 2) + "-" + pad(date.getUTCDate(), 2)
+      : formatYear(date.getUTCFullYear()) + "-" + pad(date.getUTCMonth() + 1, 2) + "-" + pad(date.getUTCDate(), 2)
       + (milliseconds ? "T" + pad(hours, 2) + ":" + pad(minutes, 2) + ":" + pad(seconds, 2) + "." + pad(milliseconds, 3) + "Z"
       : seconds ? "T" + pad(hours, 2) + ":" + pad(minutes, 2) + ":" + pad(seconds, 2) + "Z"
       : minutes || hours ? "T" + pad(hours, 2) + ":" + pad(minutes, 2) + "Z"
@@ -5918,7 +6048,9 @@ function dsvFormat(delimiter) {
     parseRows: parseRows,
     format: format,
     formatBody: formatBody,
-    formatRows: formatRows
+    formatRows: formatRows,
+    formatRow: formatRow,
+    formatValue: formatValue
   };
 }
 
@@ -5929,6 +6061,8 @@ var csvParseRows = csv.parseRows;
 var csvFormat = csv.format;
 var csvFormatBody = csv.formatBody;
 var csvFormatRows = csv.formatRows;
+var csvFormatRow = csv.formatRow;
+var csvFormatValue = csv.formatValue;
 
 var tsv = dsvFormat("\t");
 
@@ -5937,22 +6071,30 @@ var tsvParseRows = tsv.parseRows;
 var tsvFormat = tsv.format;
 var tsvFormatBody = tsv.formatBody;
 var tsvFormatRows = tsv.formatRows;
+var tsvFormatRow = tsv.formatRow;
+var tsvFormatValue = tsv.formatValue;
 
 function autoType(object) {
   for (var key in object) {
-    var value = object[key].trim(), number;
+    var value = object[key].trim(), number, m;
     if (!value) value = null;
     else if (value === "true") value = true;
     else if (value === "false") value = false;
     else if (value === "NaN") value = NaN;
     else if (!isNaN(number = +value)) value = number;
-    else if (/^([-+]\d{2})?\d{4}(-\d{2}(-\d{2})?)?(T\d{2}:\d{2}(:\d{2}(\.\d{3})?)?(Z|[-+]\d{2}:\d{2})?)?$/.test(value)) value = new Date(value);
+    else if (m = value.match(/^([-+]\d{2})?\d{4}(-\d{2}(-\d{2})?)?(T\d{2}:\d{2}(:\d{2}(\.\d{3})?)?(Z|[-+]\d{2}:\d{2})?)?$/)) {
+      if (fixtz && !!m[4] && !m[7]) value = value.replace(/-/g, "/").replace(/T/, " ");
+      value = new Date(value);
+    }
     else continue;
     object[key] = value;
   }
   return object;
 }
 
+// https://github.com/d3/d3-dsv/issues/45
+var fixtz = new Date("2019-01-01T00:00").getHours() || new Date("2019-07-01T00:00").getHours();
+
 function responseBlob(response) {
   if (!response.ok) throw new Error(response.status + " " + response.statusText);
   return response.blob();
@@ -6021,8 +6163,8 @@ function json(input, init) {
 
 function parser(type) {
   return function(input, init)  {
-    return text(input, init).then(function(text$$1) {
-      return (new DOMParser).parseFromString(text$$1, type);
+    return text(input, init).then(function(text) {
+      return (new DOMParser).parseFromString(text, type);
     });
   };
 }
@@ -7139,24 +7281,35 @@ function formatNumerals(numerals) {
 var re = /^(?:(.)?([<>=^]))?([+\-( ])?([$#])?(0)?(\d+)?(,)?(\.\d+)?(~)?([a-z%])?$/i;
 
 function formatSpecifier(specifier) {
-  return new FormatSpecifier(specifier);
+  if (!(match = re.exec(specifier))) throw new Error("invalid format: " + specifier);
+  var match;
+  return new FormatSpecifier({
+    fill: match[1],
+    align: match[2],
+    sign: match[3],
+    symbol: match[4],
+    zero: match[5],
+    width: match[6],
+    comma: match[7],
+    precision: match[8] && match[8].slice(1),
+    trim: match[9],
+    type: match[10]
+  });
 }
 
 formatSpecifier.prototype = FormatSpecifier.prototype; // instanceof
 
 function FormatSpecifier(specifier) {
-  if (!(match = re.exec(specifier))) throw new Error("invalid format: " + specifier);
-  var match;
-  this.fill = match[1] || " ";
-  this.align = match[2] || ">";
-  this.sign = match[3] || "-";
-  this.symbol = match[4] || "";
-  this.zero = !!match[5];
-  this.width = match[6] && +match[6];
-  this.comma = !!match[7];
-  this.precision = match[8] && +match[8].slice(1);
-  this.trim = !!match[9];
-  this.type = match[10] || "";
+  this.fill = specifier.fill === undefined ? " " : specifier.fill + "";
+  this.align = specifier.align === undefined ? ">" : specifier.align + "";
+  this.sign = specifier.sign === undefined ? "-" : specifier.sign + "";
+  this.symbol = specifier.symbol === undefined ? "" : specifier.symbol + "";
+  this.zero = !!specifier.zero;
+  this.width = specifier.width === undefined ? undefined : +specifier.width;
+  this.comma = !!specifier.comma;
+  this.precision = specifier.precision === undefined ? undefined : +specifier.precision;
+  this.trim = !!specifier.trim;
+  this.type = specifier.type === undefined ? "" : specifier.type + "";
 }
 
 FormatSpecifier.prototype.toString = function() {
@@ -7165,9 +7318,9 @@ FormatSpecifier.prototype.toString = function() {
       + this.sign
       + this.symbol
       + (this.zero ? "0" : "")
-      + (this.width == null ? "" : Math.max(1, this.width | 0))
+      + (this.width === undefined ? "" : Math.max(1, this.width | 0))
       + (this.comma ? "," : "")
-      + (this.precision == null ? "" : "." + Math.max(0, this.precision | 0))
+      + (this.precision === undefined ? "" : "." + Math.max(0, this.precision | 0))
       + (this.trim ? "~" : "")
       + this.type;
 };
@@ -7178,7 +7331,7 @@ function formatTrim(s) {
     switch (s[i]) {
       case ".": i0 = i1 = i; break;
       case "0": if (i0 === 0) i0 = i; i1 = i; break;
-      default: if (i0 > 0) { if (!+s[i]) break out; i0 = 0; } break;
+      default: if (!+s[i]) break out; if (i0 > 0) i0 = 0; break;
     }
   }
   return i0 > 0 ? s.slice(0, i0) + s.slice(i1 + 1) : s;
@@ -7229,14 +7382,18 @@ function identity$3(x) {
   return x;
 }
 
-var prefixes = ["y","z","a","f","p","n","\xB5","m","","k","M","G","T","P","E","Z","Y"];
+var map$2 = Array.prototype.map,
+    prefixes = ["y","z","a","f","p","n","\xB5","m","","k","M","G","T","P","E","Z","Y"];
 
 function formatLocale(locale) {
-  var group = locale.grouping && locale.thousands ? formatGroup(locale.grouping, locale.thousands) : identity$3,
-      currency = locale.currency,
-      decimal = locale.decimal,
-      numerals = locale.numerals ? formatNumerals(locale.numerals) : identity$3,
-      percent = locale.percent || "%";
+  var group = locale.grouping === undefined || locale.thousands === undefined ? identity$3 : formatGroup(map$2.call(locale.grouping, Number), locale.thousands + ""),
+      currencyPrefix = locale.currency === undefined ? "" : locale.currency[0] + "",
+      currencySuffix = locale.currency === undefined ? "" : locale.currency[1] + "",
+      decimal = locale.decimal === undefined ? "." : locale.decimal + "",
+      numerals = locale.numerals === undefined ? identity$3 : formatNumerals(map$2.call(locale.numerals, String)),
+      percent = locale.percent === undefined ? "%" : locale.percent + "",
+      minus = locale.minus === undefined ? "-" : locale.minus + "",
+      nan = locale.nan === undefined ? "NaN" : locale.nan + "";
 
   function newFormat(specifier) {
     specifier = formatSpecifier(specifier);
@@ -7256,15 +7413,15 @@ function formatLocale(locale) {
     if (type === "n") comma = true, type = "g";
 
     // The "" type, and any invalid type, is an alias for ".12~g".
-    else if (!formatTypes[type]) precision == null && (precision = 12), trim = true, type = "g";
+    else if (!formatTypes[type]) precision === undefined && (precision = 12), trim = true, type = "g";
 
     // If zero fill is specified, padding goes after sign and before digits.
     if (zero || (fill === "0" && align === "=")) zero = true, fill = "0", align = "=";
 
     // Compute the prefix and suffix.
     // For SI-prefix, the suffix is lazily computed.
-    var prefix = symbol === "$" ? currency[0] : symbol === "#" && /[boxX]/.test(type) ? "0" + type.toLowerCase() : "",
-        suffix = symbol === "$" ? currency[1] : /[%p]/.test(type) ? percent : "";
+    var prefix = symbol === "$" ? currencyPrefix : symbol === "#" && /[boxX]/.test(type) ? "0" + type.toLowerCase() : "",
+        suffix = symbol === "$" ? currencySuffix : /[%p]/.test(type) ? percent : "";
 
     // What format function should we use?
     // Is this an integer type?
@@ -7276,7 +7433,7 @@ function formatLocale(locale) {
     // or clamp the specified precision to the supported range.
     // For significant precision, it must be in [1, 21].
     // For fixed precision, it must be in [0, 20].
-    precision = precision == null ? 6
+    precision = precision === undefined ? 6
         : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision))
         : Math.max(0, Math.min(20, precision));
 
@@ -7291,18 +7448,20 @@ function formatLocale(locale) {
       } else {
         value = +value;
 
+        // Determine the sign. -0 is not less than 0, but 1 / -0 is!
+        var valueNegative = value < 0 || 1 / value < 0;
+
         // Perform the initial formatting.
-        var valueNegative = value < 0;
-        value = formatType(Math.abs(value), precision);
+        value = isNaN(value) ? nan : formatType(Math.abs(value), precision);
 
         // Trim insignificant zeros.
         if (trim) value = formatTrim(value);
 
-        // If a negative value rounds to zero during formatting, treat as positive.
-        if (valueNegative && +value === 0) valueNegative = false;
+        // If a negative value rounds to zero after formatting, and no explicit positive sign is requested, hide the sign.
+        if (valueNegative && +value === 0 && sign !== "+") valueNegative = false;
 
         // Compute the prefix and suffix.
-        valuePrefix = (valueNegative ? (sign === "(" ? sign : "-") : sign === "-" || sign === "(" ? "" : sign) + valuePrefix;
+        valuePrefix = (valueNegative ? (sign === "(" ? sign : minus) : sign === "-" || sign === "(" ? "" : sign) + valuePrefix;
         valueSuffix = (type === "s" ? prefixes[8 + prefixExponent / 3] : "") + valueSuffix + (valueNegative && sign === "(" ? ")" : "");
 
         // Break the formatted value into the integer “value” part that can be
@@ -7369,7 +7528,8 @@ defaultLocale({
   decimal: ".",
   thousands: ",",
   grouping: [3],
-  currency: ["$", ""]
+  currency: ["$", ""],
+  minus: "-"
 });
 
 function defaultLocale(definition) {
@@ -7670,6 +7830,9 @@ var boundsStream = {
     else if (deltaSum > epsilon$2) phi1 = 90;
     else if (deltaSum < -epsilon$2) phi0 = -90;
     range[0] = lambda0$1, range[1] = lambda1;
+  },
+  sphere: function() {
+    lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);
   }
 };
 
@@ -7688,14 +7851,14 @@ function linePoint(lambda, phi) {
     cartesianNormalizeInPlace(inflection);
     inflection = spherical(inflection);
     var delta = lambda - lambda2,
-        sign$$1 = delta > 0 ? 1 : -1,
-        lambdai = inflection[0] * degrees$1 * sign$$1,
+        sign = delta > 0 ? 1 : -1,
+        lambdai = inflection[0] * degrees$1 * sign,
         phii,
         antimeridian = abs(delta) > 180;
-    if (antimeridian ^ (sign$$1 * lambda2 < lambdai && lambdai < sign$$1 * lambda)) {
+    if (antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
       phii = inflection[1] * degrees$1;
       if (phii > phi1) phi1 = phii;
-    } else if (lambdai = (lambdai + 360) % 360 - 180, antimeridian ^ (sign$$1 * lambda2 < lambdai && lambdai < sign$$1 * lambda)) {
+    } else if (lambdai = (lambdai + 360) % 360 - 180, antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
       phii = -inflection[1] * degrees$1;
       if (phii < phi0) phi0 = phii;
     } else {
@@ -8240,8 +8403,15 @@ function link$1(array) {
 
 var sum$1 = adder();
 
+function longitude(point) {
+  if (abs(point[0]) <= pi$3)
+    return point[0];
+  else
+    return sign(point[0]) * ((abs(point[0]) + pi$3) % tau$3 - pi$3);
+}
+
 function polygonContains(polygon, point) {
-  var lambda = point[0],
+  var lambda = longitude(point),
       phi = point[1],
       sinPhi = sin$1(phi),
       normal = [sin$1(lambda), -cos$1(lambda), 0],
@@ -8258,25 +8428,25 @@ function polygonContains(polygon, point) {
     var ring,
         m,
         point0 = ring[m - 1],
-        lambda0 = point0[0],
+        lambda0 = longitude(point0),
         phi0 = point0[1] / 2 + quarterPi,
         sinPhi0 = sin$1(phi0),
         cosPhi0 = cos$1(phi0);
 
     for (var j = 0; j < m; ++j, lambda0 = lambda1, sinPhi0 = sinPhi1, cosPhi0 = cosPhi1, point0 = point1) {
       var point1 = ring[j],
-          lambda1 = point1[0],
+          lambda1 = longitude(point1),
           phi1 = point1[1] / 2 + quarterPi,
           sinPhi1 = sin$1(phi1),
           cosPhi1 = cos$1(phi1),
           delta = lambda1 - lambda0,
-          sign$$1 = delta >= 0 ? 1 : -1,
-          absDelta = sign$$1 * delta,
+          sign = delta >= 0 ? 1 : -1,
+          absDelta = sign * delta,
           antimeridian = absDelta > pi$3,
           k = sinPhi0 * sinPhi1;
 
-      sum$1.add(atan2(k * sign$$1 * sin$1(absDelta), cosPhi0 * cosPhi1 + k * cos$1(absDelta)));
-      angle += antimeridian ? delta + sign$$1 * tau$3 : delta;
+      sum$1.add(atan2(k * sign * sin$1(absDelta), cosPhi0 * cosPhi1 + k * cos$1(absDelta)));
+      angle += antimeridian ? delta + sign * tau$3 : delta;
 
       // Are the longitudes either side of the point’s meridian (lambda),
       // and are the latitudes smaller than the parallel (phi)?
@@ -9057,10 +9227,23 @@ function containsPoint(coordinates, point) {
 }
 
 function containsLine(coordinates, point) {
-  var ab = distance(coordinates[0], coordinates[1]),
-      ao = distance(coordinates[0], point),
-      ob = distance(point, coordinates[1]);
-  return ao + ob <= ab + epsilon$2;
+  var ao, bo, ab;
+  for (var i = 0, n = coordinates.length; i < n; i++) {
+    bo = distance(coordinates[i], point);
+    if (bo === 0) return true;
+    if (i > 0) {
+      ab = distance(coordinates[i], coordinates[i - 1]);
+      if (
+        ab > 0 &&
+        ao <= ab &&
+        bo <= ab &&
+        (ao + bo - ab) * (1 - Math.pow((ao - bo) / ab, 2)) < epsilon2$1 * ab
+      )
+        return true;
+    }
+    ao = bo;
+  }
+  return false;
 }
 
 function containsPolygon(coordinates, point) {
@@ -9772,17 +9955,18 @@ function transformRotate(rotate) {
   });
 }
 
-function scaleTranslate(k, dx, dy) {
-  function transform$$1(x, y) {
+function scaleTranslate(k, dx, dy, sx, sy) {
+  function transform(x, y) {
+    x *= sx; y *= sy;
     return [dx + k * x, dy - k * y];
   }
-  transform$$1.invert = function(x, y) {
-    return [(x - dx) / k, (dy - y) / k];
+  transform.invert = function(x, y) {
+    return [(x - dx) / k * sx, (dy - y) / k * sy];
   };
-  return transform$$1;
+  return transform;
 }
 
-function scaleTranslateRotate(k, dx, dy, alpha) {
+function scaleTranslateRotate(k, dx, dy, sx, sy, alpha) {
   var cosAlpha = cos$1(alpha),
       sinAlpha = sin$1(alpha),
       a = cosAlpha * k,
@@ -9791,13 +9975,14 @@ function scaleTranslateRotate(k, dx, dy, alpha) {
       bi = sinAlpha / k,
       ci = (sinAlpha * dy - cosAlpha * dx) / k,
       fi = (sinAlpha * dx + cosAlpha * dy) / k;
-  function transform$$1(x, y) {
+  function transform(x, y) {
+    x *= sx; y *= sy;
     return [a * x - b * y + dx, dy - b * x - a * y];
   }
-  transform$$1.invert = function(x, y) {
-    return [ai * x - bi * y + ci, fi - bi * x - ai * y];
+  transform.invert = function(x, y) {
+    return [sx * (ai * x - bi * y + ci), sy * (fi - bi * x - ai * y)];
   };
-  return transform$$1;
+  return transform;
 }
 
 function projection(project) {
@@ -9810,7 +9995,9 @@ function projectionMutator(projectAt) {
       x = 480, y = 250, // translate
       lambda = 0, phi = 0, // center
       deltaLambda = 0, deltaPhi = 0, deltaGamma = 0, rotate, // pre-rotate
-      alpha = 0, // post-rotate
+      alpha = 0, // post-rotate angle
+      sx = 1, // reflectX
+      sy = 1, // reflectX
       theta = null, preclip = clipAntimeridian, // pre-clip angle
       x0 = null, y0, x1, y1, postclip = identity$4, // post-clip extent
       delta2 = 0.5, // precision
@@ -9869,6 +10056,14 @@ function projectionMutator(projectAt) {
     return arguments.length ? (alpha = _ % 360 * radians, recenter()) : alpha * degrees$1;
   };
 
+  projection.reflectX = function(_) {
+    return arguments.length ? (sx = _ ? -1 : 1, recenter()) : sx < 0;
+  };
+
+  projection.reflectY = function(_) {
+    return arguments.length ? (sy = _ ? -1 : 1, recenter()) : sy < 0;
+  };
+
   projection.precision = function(_) {
     return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt(delta2);
   };
@@ -9890,10 +10085,10 @@ function projectionMutator(projectAt) {
   };
 
   function recenter() {
-    var center = scaleTranslateRotate(k, 0, 0, alpha).apply(null, project(lambda, phi)),
-        transform$$1 = (alpha ? scaleTranslateRotate : scaleTranslate)(k, x - center[0], y - center[1], alpha);
+    var center = scaleTranslateRotate(k, 0, 0, sx, sy, alpha).apply(null, project(lambda, phi)),
+        transform = (alpha ? scaleTranslateRotate : scaleTranslate)(k, x - center[0], y - center[1], sx, sy, alpha);
     rotate = rotateRadians(deltaLambda, deltaPhi, deltaGamma);
-    projectTransform = compose(project, transform$$1);
+    projectTransform = compose(project, transform);
     projectRotateTransform = compose(rotate, projectTransform);
     projectResample = resample(projectTransform, delta2);
     return reset();
@@ -9952,8 +10147,11 @@ function conicEqualAreaRaw(y0, y1) {
   }
 
   project.invert = function(x, y) {
-    var r0y = r0 - y;
-    return [atan2(x, abs(r0y)) / n * sign(r0y), asin((c - (x * x + r0y * r0y) * n * n) / (2 * n))];
+    var r0y = r0 - y,
+        l = atan2(x, abs(r0y)) * sign(r0y);
+    if (r0y * n < 0)
+      l -= pi$3 * sign(x) * sign(r0y);
+    return [l / n, asin((c - (x * x + r0y * r0y) * n * n) / (2 * n))];
   };
 
   return project;
@@ -10202,8 +10400,11 @@ function conicConformalRaw(y0, y1) {
   }
 
   project.invert = function(x, y) {
-    var fy = f - y, r = sign(n) * sqrt(x * x + fy * fy);
-    return [atan2(x, abs(fy)) / n * sign(fy), 2 * atan(pow(f / r, 1 / n)) - halfPi$2];
+    var fy = f - y, r = sign(n) * sqrt(x * x + fy * fy),
+      l = atan2(x, abs(fy)) * sign(fy);
+    if (fy * n < 0)
+      l -= pi$3 * sign(x) * sign(fy);
+    return [l / n, 2 * atan(pow(f / r, 1 / n)) - halfPi$2];
   };
 
   return project;
@@ -10239,8 +10440,11 @@ function conicEquidistantRaw(y0, y1) {
   }
 
   project.invert = function(x, y) {
-    var gy = g - y;
-    return [atan2(x, abs(gy)) / n * sign(gy), g - sign(n) * sqrt(x * x + gy * gy)];
+    var gy = g - y,
+        l = atan2(x, abs(gy)) * sign(gy);
+    if (gy * n < 0)
+      l -= pi$3 * sign(x) * sign(gy);
+    return [l / n, g - sign(n) * sqrt(x * x + gy * gy)];
   };
 
   return project;
@@ -10299,62 +10503,84 @@ function gnomonic() {
       .clipAngle(60);
 }
 
-function scaleTranslate$1(kx, ky, tx, ty) {
-  return kx === 1 && ky === 1 && tx === 0 && ty === 0 ? identity$4 : transformer({
-    point: function(x, y) {
-      this.stream.point(x * kx + tx, y * ky + ty);
-    }
-  });
-}
-
 function identity$5() {
-  var k = 1, tx = 0, ty = 0, sx = 1, sy = 1, transform$$1 = identity$4, // scale, translate and reflect
+  var k = 1, tx = 0, ty = 0, sx = 1, sy = 1, // scale, translate and reflect
+      alpha = 0, ca, sa, // angle
       x0 = null, y0, x1, y1, // clip extent
+      kx = 1, ky = 1,
+      transform = transformer({
+        point: function(x, y) {
+          var p = projection([x, y]);
+          this.stream.point(p[0], p[1]);
+        }
+      }),
       postclip = identity$4,
       cache,
-      cacheStream,
-      projection;
+      cacheStream;
 
   function reset() {
+    kx = k * sx;
+    ky = k * sy;
     cache = cacheStream = null;
     return projection;
   }
 
-  return projection = {
-    stream: function(stream) {
-      return cache && cacheStream === stream ? cache : cache = transform$$1(postclip(cacheStream = stream));
-    },
-    postclip: function(_) {
-      return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
-    },
-    clipExtent: function(_) {
-      return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$4) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
-    },
-    scale: function(_) {
-      return arguments.length ? (transform$$1 = scaleTranslate$1((k = +_) * sx, k * sy, tx, ty), reset()) : k;
-    },
-    translate: function(_) {
-      return arguments.length ? (transform$$1 = scaleTranslate$1(k * sx, k * sy, tx = +_[0], ty = +_[1]), reset()) : [tx, ty];
-    },
-    reflectX: function(_) {
-      return arguments.length ? (transform$$1 = scaleTranslate$1(k * (sx = _ ? -1 : 1), k * sy, tx, ty), reset()) : sx < 0;
-    },
-    reflectY: function(_) {
-      return arguments.length ? (transform$$1 = scaleTranslate$1(k * sx, k * (sy = _ ? -1 : 1), tx, ty), reset()) : sy < 0;
-    },
-    fitExtent: function(extent, object) {
-      return fitExtent(projection, extent, object);
-    },
-    fitSize: function(size, object) {
-      return fitSize(projection, size, object);
-    },
-    fitWidth: function(width, object) {
-      return fitWidth(projection, width, object);
-    },
-    fitHeight: function(height, object) {
-      return fitHeight(projection, height, object);
+  function projection (p) {
+    var x = p[0] * kx, y = p[1] * ky;
+    if (alpha) {
+      var t = y * ca - x * sa;
+      x = x * ca + y * sa;
+      y = t;
+    }    
+    return [x + tx, y + ty];
+  }
+  projection.invert = function(p) {
+    var x = p[0] - tx, y = p[1] - ty;
+    if (alpha) {
+      var t = y * ca + x * sa;
+      x = x * ca - y * sa;
+      y = t;
     }
+    return [x / kx, y / ky];
+  };
+  projection.stream = function(stream) {
+    return cache && cacheStream === stream ? cache : cache = transform(postclip(cacheStream = stream));
+  };
+  projection.postclip = function(_) {
+    return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
+  };
+  projection.clipExtent = function(_) {
+    return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$4) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
+  };
+  projection.scale = function(_) {
+    return arguments.length ? (k = +_, reset()) : k;
+  };
+  projection.translate = function(_) {
+    return arguments.length ? (tx = +_[0], ty = +_[1], reset()) : [tx, ty];
+  };
+  projection.angle = function(_) {
+    return arguments.length ? (alpha = _ % 360 * radians, sa = sin$1(alpha), ca = cos$1(alpha), reset()) : alpha * degrees$1;
+  };
+  projection.reflectX = function(_) {
+    return arguments.length ? (sx = _ ? -1 : 1, reset()) : sx < 0;
+  };
+  projection.reflectY = function(_) {
+    return arguments.length ? (sy = _ ? -1 : 1, reset()) : sy < 0;
+  };
+  projection.fitExtent = function(extent, object) {
+    return fitExtent(projection, extent, object);
   };
+  projection.fitSize = function(size, object) {
+    return fitSize(projection, size, object);
+  };
+  projection.fitWidth = function(width, object) {
+    return fitWidth(projection, width, object);
+  };
+  projection.fitHeight = function(height, object) {
+    return fitHeight(projection, height, object);
+  };
+
+  return projection;
 }
 
 function naturalEarth1Raw(lambda, phi) {
@@ -11951,7 +12177,7 @@ function initInterpolator(domain, interpolator) {
 
 var array$3 = Array.prototype;
 
-var map$2 = array$3.map;
+var map$3 = array$3.map;
 var slice$5 = array$3.slice;
 
 var implicit = {name: "implicit"};
@@ -12000,7 +12226,7 @@ function band() {
   var scale = ordinal().unknown(undefined),
       domain = scale.domain,
       ordinalRange = scale.range,
-      range$$1 = [0, 1],
+      range = [0, 1],
       step,
       bandwidth,
       round = false,
@@ -12012,9 +12238,9 @@ function band() {
 
   function rescale() {
     var n = domain().length,
-        reverse = range$$1[1] < range$$1[0],
-        start = range$$1[reverse - 0],
-        stop = range$$1[1 - reverse];
+        reverse = range[1] < range[0],
+        start = range[reverse - 0],
+        stop = range[1 - reverse];
     step = (stop - start) / Math.max(1, n - paddingInner + paddingOuter * 2);
     if (round) step = Math.floor(step);
     start += (stop - start - step * (n - paddingInner)) * align;
@@ -12029,11 +12255,11 @@ function band() {
   };
 
   scale.range = function(_) {
-    return arguments.length ? (range$$1 = [+_[0], +_[1]], rescale()) : range$$1.slice();
+    return arguments.length ? (range = [+_[0], +_[1]], rescale()) : range.slice();
   };
 
   scale.rangeRound = function(_) {
-    return range$$1 = [+_[0], +_[1]], round = true, rescale();
+    return range = [+_[0], +_[1]], round = true, rescale();
   };
 
   scale.bandwidth = function() {
@@ -12065,7 +12291,7 @@ function band() {
   };
 
   scale.copy = function() {
-    return band(domain(), range$$1)
+    return band(domain(), range)
         .round(round)
         .paddingInner(paddingInner)
         .paddingOuter(paddingOuter)
@@ -12123,14 +12349,14 @@ function clamper(domain) {
 
 // normalize(a, b)(x) takes a domain value x in [a,b] and returns the corresponding parameter t in [0,1].
 // interpolate(a, b)(t) takes a parameter t in [0,1] and returns the corresponding range value x in [a,b].
-function bimap(domain, range, interpolate$$1) {
+function bimap(domain, range, interpolate) {
   var d0 = domain[0], d1 = domain[1], r0 = range[0], r1 = range[1];
-  if (d1 < d0) d0 = normalize(d1, d0), r0 = interpolate$$1(r1, r0);
-  else d0 = normalize(d0, d1), r0 = interpolate$$1(r0, r1);
+  if (d1 < d0) d0 = normalize(d1, d0), r0 = interpolate(r1, r0);
+  else d0 = normalize(d0, d1), r0 = interpolate(r0, r1);
   return function(x) { return r0(d0(x)); };
 }
 
-function polymap(domain, range, interpolate$$1) {
+function polymap(domain, range, interpolate) {
   var j = Math.min(domain.length, range.length) - 1,
       d = new Array(j),
       r = new Array(j),
@@ -12144,7 +12370,7 @@ function polymap(domain, range, interpolate$$1) {
 
   while (++i < j) {
     d[i] = normalize(domain[i], domain[i + 1]);
-    r[i] = interpolate$$1(range[i], range[i + 1]);
+    r[i] = interpolate(range[i], range[i + 1]);
   }
 
   return function(x) {
@@ -12165,31 +12391,31 @@ function copy(source, target) {
 function transformer$1() {
   var domain = unit,
       range = unit,
-      interpolate$$1 = interpolateValue,
+      interpolate = interpolateValue,
       transform,
       untransform,
       unknown,
       clamp = identity$6,
-      piecewise$$1,
+      piecewise,
       output,
       input;
 
   function rescale() {
-    piecewise$$1 = Math.min(domain.length, range.length) > 2 ? polymap : bimap;
+    piecewise = Math.min(domain.length, range.length) > 2 ? polymap : bimap;
     output = input = null;
     return scale;
   }
 
   function scale(x) {
-    return isNaN(x = +x) ? unknown : (output || (output = piecewise$$1(domain.map(transform), range, interpolate$$1)))(transform(clamp(x)));
+    return isNaN(x = +x) ? unknown : (output || (output = piecewise(domain.map(transform), range, interpolate)))(transform(clamp(x)));
   }
 
   scale.invert = function(y) {
-    return clamp(untransform((input || (input = piecewise$$1(range, domain.map(transform), interpolateNumber)))(y)));
+    return clamp(untransform((input || (input = piecewise(range, domain.map(transform), interpolateNumber)))(y)));
   };
 
   scale.domain = function(_) {
-    return arguments.length ? (domain = map$2.call(_, number$2), clamp === identity$6 || (clamp = clamper(domain)), rescale()) : domain.slice();
+    return arguments.length ? (domain = map$3.call(_, number$2), clamp === identity$6 || (clamp = clamper(domain)), rescale()) : domain.slice();
   };
 
   scale.range = function(_) {
@@ -12197,7 +12423,7 @@ function transformer$1() {
   };
 
   scale.rangeRound = function(_) {
-    return range = slice$5.call(_), interpolate$$1 = interpolateRound, rescale();
+    return range = slice$5.call(_), interpolate = interpolateRound, rescale();
   };
 
   scale.clamp = function(_) {
@@ -12205,7 +12431,7 @@ function transformer$1() {
   };
 
   scale.interpolate = function(_) {
-    return arguments.length ? (interpolate$$1 = _, rescale()) : interpolate$$1;
+    return arguments.length ? (interpolate = _, rescale()) : interpolate;
   };
 
   scale.unknown = function(_) {
@@ -12327,7 +12553,7 @@ function identity$7(domain) {
   scale.invert = scale;
 
   scale.domain = scale.range = function(_) {
-    return arguments.length ? (domain = map$2.call(_, number$2), scale) : domain.slice();
+    return arguments.length ? (domain = map$3.call(_, number$2), scale) : domain.slice();
   };
 
   scale.unknown = function(_) {
@@ -12338,7 +12564,7 @@ function identity$7(domain) {
     return identity$7(domain).unknown(unknown);
   };
 
-  domain = arguments.length ? map$2.call(domain, number$2) : [0, 1];
+  domain = arguments.length ? map$3.call(domain, number$2) : [0, 1];
 
   return linearish(scale);
 }
@@ -12581,7 +12807,7 @@ function sqrt$1() {
   return pow$1.apply(null, arguments).exponent(0.5);
 }
 
-function quantile$$1() {
+function quantile() {
   var domain = [],
       range = [],
       thresholds = [],
@@ -12627,7 +12853,7 @@ function quantile$$1() {
   };
 
   scale.copy = function() {
-    return quantile$$1()
+    return quantile()
         .domain(domain)
         .range(range)
         .unknown(unknown);
@@ -12732,10 +12958,12 @@ var t0$1 = new Date,
 function newInterval(floori, offseti, count, field) {
 
   function interval(date) {
-    return floori(date = new Date(+date)), date;
+    return floori(date = arguments.length === 0 ? new Date : new Date(+date)), date;
   }
 
-  interval.floor = interval;
+  interval.floor = function(date) {
+    return floori(date = new Date(+date)), date;
+  };
 
   interval.ceil = function(date) {
     return floori(date = new Date(date - 1)), offseti(date, 1), floori(date), date;
@@ -13043,8 +13271,8 @@ function utcDate(d) {
   return new Date(Date.UTC(d.y, d.m, d.d, d.H, d.M, d.S, d.L));
 }
 
-function newYear(y) {
-  return {y: y, m: 0, d: 1, H: 0, M: 0, S: 0, L: 0};
+function newDate(y, m, d) {
+  return {y: y, m: m, d: d, H: 0, M: 0, S: 0, L: 0};
 }
 
 function formatLocale$1(locale) {
@@ -13084,6 +13312,7 @@ function formatLocale$1(locale) {
     "m": formatMonthNumber,
     "M": formatMinutes,
     "p": formatPeriod,
+    "q": formatQuarter,
     "Q": formatUnixTimestamp,
     "s": formatUnixTimestampSeconds,
     "S": formatSeconds,
@@ -13116,6 +13345,7 @@ function formatLocale$1(locale) {
     "m": formatUTCMonthNumber,
     "M": formatUTCMinutes,
     "p": formatUTCPeriod,
+    "q": formatUTCQuarter,
     "Q": formatUnixTimestamp,
     "s": formatUnixTimestampSeconds,
     "S": formatUTCSeconds,
@@ -13148,6 +13378,7 @@ function formatLocale$1(locale) {
     "m": parseMonthNumber,
     "M": parseMinutes,
     "p": parsePeriod,
+    "q": parseQuarter,
     "Q": parseUnixTimestamp,
     "s": parseUnixTimestampSeconds,
     "S": parseSeconds,
@@ -13200,33 +13431,40 @@ function formatLocale$1(locale) {
     };
   }
 
-  function newParse(specifier, newDate) {
+  function newParse(specifier, Z) {
     return function(string) {
-      var d = newYear(1900),
+      var d = newDate(1900, undefined, 1),
           i = parseSpecifier(d, specifier, string += "", 0),
-          week, day$$1;
+          week, day$1;
       if (i != string.length) return null;
 
       // If a UNIX timestamp is specified, return it.
       if ("Q" in d) return new Date(d.Q);
+      if ("s" in d) return new Date(d.s * 1000 + ("L" in d ? d.L : 0));
+
+      // If this is utcParse, never use the local timezone.
+      if (Z && !("Z" in d)) d.Z = 0;
 
       // The am-pm flag is 0 for AM, and 1 for PM.
       if ("p" in d) d.H = d.H % 12 + d.p * 12;
 
+      // If the month was not specified, inherit from the quarter.
+      if (d.m === undefined) d.m = "q" in d ? d.q : 0;
+
       // Convert day-of-week and week-of-year to day-of-year.
       if ("V" in d) {
         if (d.V < 1 || d.V > 53) return null;
         if (!("w" in d)) d.w = 1;
         if ("Z" in d) {
-          week = utcDate(newYear(d.y)), day$$1 = week.getUTCDay();
-          week = day$$1 > 4 || day$$1 === 0 ? utcMonday.ceil(week) : utcMonday(week);
+          week = utcDate(newDate(d.y, 0, 1)), day$1 = week.getUTCDay();
+          week = day$1 > 4 || day$1 === 0 ? utcMonday.ceil(week) : utcMonday(week);
           week = utcDay.offset(week, (d.V - 1) * 7);
           d.y = week.getUTCFullYear();
           d.m = week.getUTCMonth();
           d.d = week.getUTCDate() + (d.w + 6) % 7;
         } else {
-          week = newDate(newYear(d.y)), day$$1 = week.getDay();
-          week = day$$1 > 4 || day$$1 === 0 ? monday.ceil(week) : monday(week);
+          week = localDate(newDate(d.y, 0, 1)), day$1 = week.getDay();
+          week = day$1 > 4 || day$1 === 0 ? monday.ceil(week) : monday(week);
           week = day.offset(week, (d.V - 1) * 7);
           d.y = week.getFullYear();
           d.m = week.getMonth();
@@ -13234,9 +13472,9 @@ function formatLocale$1(locale) {
         }
       } else if ("W" in d || "U" in d) {
         if (!("w" in d)) d.w = "u" in d ? d.u % 7 : "W" in d ? 1 : 0;
-        day$$1 = "Z" in d ? utcDate(newYear(d.y)).getUTCDay() : newDate(newYear(d.y)).getDay();
+        day$1 = "Z" in d ? utcDate(newDate(d.y, 0, 1)).getUTCDay() : localDate(newDate(d.y, 0, 1)).getDay();
         d.m = 0;
-        d.d = "W" in d ? (d.w + 6) % 7 + d.W * 7 - (day$$1 + 5) % 7 : d.w + d.U * 7 - (day$$1 + 6) % 7;
+        d.d = "W" in d ? (d.w + 6) % 7 + d.W * 7 - (day$1 + 5) % 7 : d.w + d.U * 7 - (day$1 + 6) % 7;
       }
 
       // If a time zone is specified, all fields are interpreted as UTC and then
@@ -13248,7 +13486,7 @@ function formatLocale$1(locale) {
       }
 
       // Otherwise, all fields are in local time.
-      return newDate(d);
+      return localDate(d);
     };
   }
 
@@ -13331,6 +13569,10 @@ function formatLocale$1(locale) {
     return locale_periods[+(d.getHours() >= 12)];
   }
 
+  function formatQuarter(d) {
+    return 1 + ~~(d.getMonth() / 3);
+  }
+
   function formatUTCShortWeekday(d) {
     return locale_shortWeekdays[d.getUTCDay()];
   }
@@ -13351,6 +13593,10 @@ function formatLocale$1(locale) {
     return locale_periods[+(d.getUTCHours() >= 12)];
   }
 
+  function formatUTCQuarter(d) {
+    return 1 + ~~(d.getUTCMonth() / 3);
+  }
+
   return {
     format: function(specifier) {
       var f = newFormat(specifier += "", formats);
@@ -13358,7 +13604,7 @@ function formatLocale$1(locale) {
       return f;
     },
     parse: function(specifier) {
-      var p = newParse(specifier += "", localDate);
+      var p = newParse(specifier += "", false);
       p.toString = function() { return specifier; };
       return p;
     },
@@ -13368,7 +13614,7 @@ function formatLocale$1(locale) {
       return f;
     },
     utcParse: function(specifier) {
-      var p = newParse(specifier, utcDate);
+      var p = newParse(specifier += "", true);
       p.toString = function() { return specifier; };
       return p;
     }
@@ -13441,6 +13687,11 @@ function parseZone(d, string, i) {
   return n ? (d.Z = n[1] ? 0 : -(n[2] + (n[3] || "00")), i + n[0].length) : -1;
 }
 
+function parseQuarter(d, string, i) {
+  var n = numberRe.exec(string.slice(i, i + 1));
+  return n ? (d.q = n[0] * 3 - 3, i + n[0].length) : -1;
+}
+
 function parseMonthNumber(d, string, i) {
   var n = numberRe.exec(string.slice(i, i + 2));
   return n ? (d.m = n[0] - 1, i + n[0].length) : -1;
@@ -13493,7 +13744,7 @@ function parseUnixTimestamp(d, string, i) {
 
 function parseUnixTimestampSeconds(d, string, i) {
   var n = numberRe.exec(string.slice(i));
-  return n ? (d.Q = (+n[0]) * 1000, i + n[0].length) : -1;
+  return n ? (d.s = +n[0], i + n[0].length) : -1;
 }
 
 function formatDayOfMonth(d, p) {
@@ -13533,17 +13784,17 @@ function formatSeconds(d, p) {
 }
 
 function formatWeekdayNumberMonday(d) {
-  var day$$1 = d.getDay();
-  return day$$1 === 0 ? 7 : day$$1;
+  var day = d.getDay();
+  return day === 0 ? 7 : day;
 }
 
 function formatWeekNumberSunday(d, p) {
-  return pad$1(sunday.count(year(d), d), p, 2);
+  return pad$1(sunday.count(year(d) - 1, d), p, 2);
 }
 
 function formatWeekNumberISO(d, p) {
-  var day$$1 = d.getDay();
-  d = (day$$1 >= 4 || day$$1 === 0) ? thursday(d) : thursday.ceil(d);
+  var day = d.getDay();
+  d = (day >= 4 || day === 0) ? thursday(d) : thursday.ceil(d);
   return pad$1(thursday.count(year(d), d) + (year(d).getDay() === 4), p, 2);
 }
 
@@ -13552,7 +13803,7 @@ function formatWeekdayNumberSunday(d) {
 }
 
 function formatWeekNumberMonday(d, p) {
-  return pad$1(monday.count(year(d), d), p, 2);
+  return pad$1(monday.count(year(d) - 1, d), p, 2);
 }
 
 function formatYear$1(d, p) {
@@ -13612,12 +13863,12 @@ function formatUTCWeekdayNumberMonday(d) {
 }
 
 function formatUTCWeekNumberSunday(d, p) {
-  return pad$1(utcSunday.count(utcYear(d), d), p, 2);
+  return pad$1(utcSunday.count(utcYear(d) - 1, d), p, 2);
 }
 
 function formatUTCWeekNumberISO(d, p) {
-  var day$$1 = d.getUTCDay();
-  d = (day$$1 >= 4 || day$$1 === 0) ? utcThursday(d) : utcThursday.ceil(d);
+  var day = d.getUTCDay();
+  d = (day >= 4 || day === 0) ? utcThursday(d) : utcThursday.ceil(d);
   return pad$1(utcThursday.count(utcYear(d), d) + (utcYear(d).getUTCDay() === 4), p, 2);
 }
 
@@ -13626,7 +13877,7 @@ function formatUTCWeekdayNumberSunday(d) {
 }
 
 function formatUTCWeekNumberMonday(d, p) {
-  return pad$1(utcMonday.count(utcYear(d), d), p, 2);
+  return pad$1(utcMonday.count(utcYear(d) - 1, d), p, 2);
 }
 
 function formatUTCYear(d, p) {
@@ -13710,7 +13961,7 @@ function number$3(t) {
   return t instanceof Date ? +t : +new Date(+t);
 }
 
-function calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1, millisecond$$1, format) {
+function calendar(year, month, week, day, hour, minute, second, millisecond, format) {
   var scale = continuous(identity$6, identity$6),
       invert = scale.invert,
       domain = scale.domain;
@@ -13725,33 +13976,33 @@ function calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1
       formatYear = format("%Y");
 
   var tickIntervals = [
-    [second$$1,  1,      durationSecond$1],
-    [second$$1,  5,  5 * durationSecond$1],
-    [second$$1, 15, 15 * durationSecond$1],
-    [second$$1, 30, 30 * durationSecond$1],
-    [minute$$1,  1,      durationMinute$1],
-    [minute$$1,  5,  5 * durationMinute$1],
-    [minute$$1, 15, 15 * durationMinute$1],
-    [minute$$1, 30, 30 * durationMinute$1],
-    [  hour$$1,  1,      durationHour$1  ],
-    [  hour$$1,  3,  3 * durationHour$1  ],
-    [  hour$$1,  6,  6 * durationHour$1  ],
-    [  hour$$1, 12, 12 * durationHour$1  ],
-    [   day$$1,  1,      durationDay$1   ],
-    [   day$$1,  2,  2 * durationDay$1   ],
+    [second,  1,      durationSecond$1],
+    [second,  5,  5 * durationSecond$1],
+    [second, 15, 15 * durationSecond$1],
+    [second, 30, 30 * durationSecond$1],
+    [minute,  1,      durationMinute$1],
+    [minute,  5,  5 * durationMinute$1],
+    [minute, 15, 15 * durationMinute$1],
+    [minute, 30, 30 * durationMinute$1],
+    [  hour,  1,      durationHour$1  ],
+    [  hour,  3,  3 * durationHour$1  ],
+    [  hour,  6,  6 * durationHour$1  ],
+    [  hour, 12, 12 * durationHour$1  ],
+    [   day,  1,      durationDay$1   ],
+    [   day,  2,  2 * durationDay$1   ],
     [  week,  1,      durationWeek$1  ],
-    [ month$$1,  1,      durationMonth ],
-    [ month$$1,  3,  3 * durationMonth ],
-    [  year$$1,  1,      durationYear  ]
+    [ month,  1,      durationMonth ],
+    [ month,  3,  3 * durationMonth ],
+    [  year,  1,      durationYear  ]
   ];
 
   function tickFormat(date) {
-    return (second$$1(date) < date ? formatMillisecond
-        : minute$$1(date) < date ? formatSecond
-        : hour$$1(date) < date ? formatMinute
-        : day$$1(date) < date ? formatHour
-        : month$$1(date) < date ? (week(date) < date ? formatDay : formatWeek)
-        : year$$1(date) < date ? formatMonth
+    return (second(date) < date ? formatMillisecond
+        : minute(date) < date ? formatSecond
+        : hour(date) < date ? formatMinute
+        : day(date) < date ? formatHour
+        : month(date) < date ? (week(date) < date ? formatDay : formatWeek)
+        : year(date) < date ? formatMonth
         : formatYear)(date);
   }
 
@@ -13766,14 +14017,14 @@ function calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1
           i = bisector(function(i) { return i[2]; }).right(tickIntervals, target);
       if (i === tickIntervals.length) {
         step = tickStep(start / durationYear, stop / durationYear, interval);
-        interval = year$$1;
+        interval = year;
       } else if (i) {
         i = tickIntervals[target / tickIntervals[i - 1][2] < tickIntervals[i][2] / target ? i - 1 : i];
         step = i[1];
         interval = i[0];
       } else {
         step = Math.max(tickStep(start, stop, interval), 1);
-        interval = millisecond$$1;
+        interval = millisecond;
       }
     }
 
@@ -13785,7 +14036,7 @@ function calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1
   };
 
   scale.domain = function(_) {
-    return arguments.length ? domain(map$2.call(_, number$3)) : domain().map(date$1);
+    return arguments.length ? domain(map$3.call(_, number$3)) : domain().map(date$1);
   };
 
   scale.ticks = function(interval, step) {
@@ -13812,7 +14063,7 @@ function calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1
   };
 
   scale.copy = function() {
-    return copy(scale, calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1, millisecond$$1, format));
+    return copy(scale, calendar(year, month, week, day, hour, minute, second, millisecond, format));
   };
 
   return scale;
@@ -14050,6 +14301,8 @@ var Set2 = colors("66c2a5fc8d628da0cbe78ac3a6d854ffd92fe5c494b3b3b3");
 
 var Set3 = colors("8dd3c7ffffb3bebadafb807280b1d3fdb462b3de69fccde5d9d9d9bc80bdccebc5ffed6f");
 
+var Tableau10 = colors("4e79a7f28e2ce1575976b7b259a14fedc949af7aa1ff9da79c755fbab0ab");
+
 function ramp(scheme) {
   return rgbBasis(scheme[scheme.length - 1]);
 }
@@ -14396,6 +14649,15 @@ var scheme$q = new Array(3).concat(
 
 var Oranges = ramp(scheme$q);
 
+function cividis(t) {
+  t = Math.max(0, Math.min(1, t));
+  return "rgb("
+      + Math.max(0, Math.min(255, Math.round(-4.54 - t * (35.34 - t * (2381.73 - t * (6402.7 - t * (7024.72 - t * 2710.57))))))) + ", "
+      + Math.max(0, Math.min(255, Math.round(32.49 + t * (170.73 + t * (52.82 - t * (131.46 - t * (176.58 - t * 67.37))))))) + ", "
+      + Math.max(0, Math.min(255, Math.round(81.24 + t * (442.36 - t * (2482.43 - t * (6167.24 - t * (6614.94 - t * 2475.67)))))))
+      + ")";
+}
+
 var cubehelix$3 = cubehelixLong(cubehelix(300, 0.5, 0.0), cubehelix(-240, 0.5, 1.0));
 
 var warm = cubehelixLong(cubehelix(-100, 0.75, 0.35), cubehelix(80, 1.50, 0.8));
@@ -14426,6 +14688,15 @@ function sinebow(t) {
   return c$1 + "";
 }
 
+function turbo(t) {
+  t = Math.max(0, Math.min(1, t));
+  return "rgb("
+      + Math.max(0, Math.min(255, Math.round(34.61 + t * (1172.33 - t * (10793.56 - t * (33300.12 - t * (38394.49 - t * 14825.05))))))) + ", "
+      + Math.max(0, Math.min(255, Math.round(23.31 + t * (557.33 + t * (1225.33 - t * (3574.96 - t * (1073.77 + t * 707.56))))))) + ", "
+      + Math.max(0, Math.min(255, Math.round(27.2 + t * (3211.1 - t * (15327.97 - t * (27814 - t * (22569.18 - t * 6838.66)))))))
+      + ")";
+}
+
 function ramp$1(range) {
   var n = range.length;
   return function(t) {
@@ -14767,8 +15038,8 @@ function y$3(p) {
 }
 
 function line() {
-  var x$$1 = x$3,
-      y$$1 = y$3,
+  var x = x$3,
+      y = y$3,
       defined = constant$b(true),
       context = null,
       curve = curveLinear,
@@ -14788,18 +15059,18 @@ function line() {
         if (defined0 = !defined0) output.lineStart();
         else output.lineEnd();
       }
-      if (defined0) output.point(+x$$1(d, i, data), +y$$1(d, i, data));
+      if (defined0) output.point(+x(d, i, data), +y(d, i, data));
     }
 
     if (buffer) return output = null, buffer + "" || null;
   }
 
   line.x = function(_) {
-    return arguments.length ? (x$$1 = typeof _ === "function" ? _ : constant$b(+_), line) : x$$1;
+    return arguments.length ? (x = typeof _ === "function" ? _ : constant$b(+_), line) : x;
   };
 
   line.y = function(_) {
-    return arguments.length ? (y$$1 = typeof _ === "function" ? _ : constant$b(+_), line) : y$$1;
+    return arguments.length ? (y = typeof _ === "function" ? _ : constant$b(+_), line) : y;
   };
 
   line.defined = function(_) {
@@ -15099,14 +15370,14 @@ function linkTarget(d) {
 function link$2(curve) {
   var source = linkSource,
       target = linkTarget,
-      x$$1 = x$3,
-      y$$1 = y$3,
+      x = x$3,
+      y = y$3,
       context = null;
 
   function link() {
     var buffer, argv = slice$6.call(arguments), s = source.apply(this, argv), t = target.apply(this, argv);
     if (!context) context = buffer = path();
-    curve(context, +x$$1.apply(this, (argv[0] = s, argv)), +y$$1.apply(this, argv), +x$$1.apply(this, (argv[0] = t, argv)), +y$$1.apply(this, argv));
+    curve(context, +x.apply(this, (argv[0] = s, argv)), +y.apply(this, argv), +x.apply(this, (argv[0] = t, argv)), +y.apply(this, argv));
     if (buffer) return context = null, buffer + "" || null;
   }
 
@@ -15119,11 +15390,11 @@ function link$2(curve) {
   };
 
   link.x = function(_) {
-    return arguments.length ? (x$$1 = typeof _ === "function" ? _ : constant$b(+_), link) : x$$1;
+    return arguments.length ? (x = typeof _ === "function" ? _ : constant$b(+_), link) : x;
   };
 
   link.y = function(_) {
-    return arguments.length ? (y$$1 = typeof _ === "function" ? _ : constant$b(+_), link) : y$$1;
+    return arguments.length ? (y = typeof _ === "function" ? _ : constant$b(+_), link) : y;
   };
 
   link.context = function(_) {
@@ -15623,15 +15894,15 @@ CardinalClosed.prototype = {
 
 var cardinalClosed = (function custom(tension) {
 
-  function cardinal$$1(context) {
+  function cardinal(context) {
     return new CardinalClosed(context, tension);
   }
 
-  cardinal$$1.tension = function(tension) {
+  cardinal.tension = function(tension) {
     return custom(+tension);
   };
 
-  return cardinal$$1;
+  return cardinal;
 })(0);
 
 function CardinalOpen(context, tension) {
@@ -15671,15 +15942,15 @@ CardinalOpen.prototype = {
 
 var cardinalOpen = (function custom(tension) {
 
-  function cardinal$$1(context) {
+  function cardinal(context) {
     return new CardinalOpen(context, tension);
   }
 
-  cardinal$$1.tension = function(tension) {
+  cardinal.tension = function(tension) {
     return custom(+tension);
   };
 
-  return cardinal$$1;
+  return cardinal;
 })(0);
 
 function point$4(that, x, y) {
@@ -15828,15 +16099,15 @@ CatmullRomClosed.prototype = {
 
 var catmullRomClosed = (function custom(alpha) {
 
-  function catmullRom$$1(context) {
+  function catmullRom(context) {
     return alpha ? new CatmullRomClosed(context, alpha) : new CardinalClosed(context, 0);
   }
 
-  catmullRom$$1.alpha = function(alpha) {
+  catmullRom.alpha = function(alpha) {
     return custom(+alpha);
   };
 
-  return catmullRom$$1;
+  return catmullRom;
 })(0.5);
 
 function CatmullRomOpen(context, alpha) {
@@ -15888,15 +16159,15 @@ CatmullRomOpen.prototype = {
 
 var catmullRomOpen = (function custom(alpha) {
 
-  function catmullRom$$1(context) {
+  function catmullRom(context) {
     return alpha ? new CatmullRomOpen(context, alpha) : new CardinalOpen(context, 0);
   }
 
-  catmullRom$$1.alpha = function(alpha) {
+  catmullRom.alpha = function(alpha) {
     return custom(+alpha);
   };
 
-  return catmullRom$$1;
+  return catmullRom;
 })(0.5);
 
 function LinearClosed(context) {
@@ -16227,15 +16498,15 @@ function expand(series, order) {
 }
 
 function diverging$1(series, order) {
-  if (!((n = series.length) > 1)) return;
+  if (!((n = series.length) > 0)) return;
   for (var i, j = 0, d, dy, yp, yn, n, m = series[order[0]].length; j < m; ++j) {
     for (yp = yn = 0, i = 0; i < n; ++i) {
-      if ((dy = (d = series[order[i]][j])[1] - d[0]) >= 0) {
+      if ((dy = (d = series[order[i]][j])[1] - d[0]) > 0) {
         d[0] = yp, d[1] = yp += dy;
       } else if (dy < 0) {
         d[1] = yn, d[0] = yn += dy;
       } else {
-        d[0] = yp;
+        d[0] = 0, d[1] = dy;
       }
     }
   }
@@ -17271,13 +17542,13 @@ Diagram.prototype = {
 };
 
 function voronoi() {
-  var x$$1 = x$4,
-      y$$1 = y$4,
+  var x = x$4,
+      y = y$4,
       extent = null;
 
   function voronoi(data) {
     return new Diagram(data.map(function(d, i) {
-      var s = [Math.round(x$$1(d, i, data) / epsilon$4) * epsilon$4, Math.round(y$$1(d, i, data) / epsilon$4) * epsilon$4];
+      var s = [Math.round(x(d, i, data) / epsilon$4) * epsilon$4, Math.round(y(d, i, data) / epsilon$4) * epsilon$4];
       s.index = i;
       s.data = d;
       return s;
@@ -17297,11 +17568,11 @@ function voronoi() {
   };
 
   voronoi.x = function(_) {
-    return arguments.length ? (x$$1 = typeof _ === "function" ? _ : constant$c(+_), voronoi) : x$$1;
+    return arguments.length ? (x = typeof _ === "function" ? _ : constant$c(+_), voronoi) : x;
   };
 
   voronoi.y = function(_) {
-    return arguments.length ? (y$$1 = typeof _ === "function" ? _ : constant$c(+_), voronoi) : y$$1;
+    return arguments.length ? (y = typeof _ === "function" ? _ : constant$c(+_), voronoi) : y;
   };
 
   voronoi.extent = function(_) {
@@ -17375,7 +17646,8 @@ var identity$9 = new Transform(1, 0, 0);
 transform$1.prototype = Transform.prototype;
 
 function transform$1(node) {
-  return node.__zoom || identity$9;
+  while (!node.__zoom) if (!(node = node.parentNode)) return identity$9;
+  return node.__zoom;
 }
 
 function nopropagation$2() {
@@ -17389,20 +17661,20 @@ function noevent$2() {
 
 // Ignore right-click, since that should open the context menu.
 function defaultFilter$2() {
-  return !exports.event.button;
+  return !exports.event.ctrlKey && !exports.event.button;
 }
 
 function defaultExtent$1() {
-  var e = this, w, h;
+  var e = this;
   if (e instanceof SVGElement) {
     e = e.ownerSVGElement || e;
-    w = e.width.baseVal.value;
-    h = e.height.baseVal.value;
-  } else {
-    w = e.clientWidth;
-    h = e.clientHeight;
+    if (e.hasAttribute("viewBox")) {
+      e = e.viewBox.baseVal;
+      return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
+    }
+    return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
   }
-  return [[0, 0], [w, h]];
+  return [[0, 0], [e.clientWidth, e.clientHeight]];
 }
 
 function defaultTransform() {
@@ -17410,11 +17682,11 @@ function defaultTransform() {
 }
 
 function defaultWheelDelta() {
-  return -exports.event.deltaY * (exports.event.deltaMode ? 120 : 1) / 500;
+  return -exports.event.deltaY * (exports.event.deltaMode === 1 ? 0.05 : exports.event.deltaMode ? 1 : 0.002);
 }
 
-function defaultTouchable$1() {
-  return "ontouchstart" in this;
+function defaultTouchable$2() {
+  return navigator.maxTouchPoints || ("ontouchstart" in this);
 }
 
 function defaultConstrain(transform, extent, translateExtent) {
@@ -17433,12 +17705,11 @@ function zoom() {
       extent = defaultExtent$1,
       constrain = defaultConstrain,
       wheelDelta = defaultWheelDelta,
-      touchable = defaultTouchable$1,
+      touchable = defaultTouchable$2,
       scaleExtent = [0, Infinity],
       translateExtent = [[-Infinity, -Infinity], [Infinity, Infinity]],
       duration = 250,
       interpolate = interpolateZoom,
-      gestures = [],
       listeners = dispatch("start", "zoom", "end"),
       touchstarting,
       touchending,
@@ -17446,8 +17717,8 @@ function zoom() {
       wheelDelay = 150,
       clickDistance2 = 0;
 
-  function zoom(selection$$1) {
-    selection$$1
+  function zoom(selection) {
+    selection
         .property("__zoom", defaultTransform)
         .on("wheel.zoom", wheeled)
         .on("mousedown.zoom", mousedowned)
@@ -17460,13 +17731,13 @@ function zoom() {
         .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
   }
 
-  zoom.transform = function(collection, transform) {
-    var selection$$1 = collection.selection ? collection.selection() : collection;
-    selection$$1.property("__zoom", defaultTransform);
-    if (collection !== selection$$1) {
-      schedule(collection, transform);
+  zoom.transform = function(collection, transform, point) {
+    var selection = collection.selection ? collection.selection() : collection;
+    selection.property("__zoom", defaultTransform);
+    if (collection !== selection) {
+      schedule(collection, transform, point);
     } else {
-      selection$$1.interrupt().each(function() {
+      selection.interrupt().each(function() {
         gesture(this, arguments)
             .start()
             .zoom(null, typeof transform === "function" ? transform.apply(this, arguments) : transform)
@@ -17475,27 +17746,27 @@ function zoom() {
     }
   };
 
-  zoom.scaleBy = function(selection$$1, k) {
-    zoom.scaleTo(selection$$1, function() {
+  zoom.scaleBy = function(selection, k, p) {
+    zoom.scaleTo(selection, function() {
       var k0 = this.__zoom.k,
           k1 = typeof k === "function" ? k.apply(this, arguments) : k;
       return k0 * k1;
-    });
+    }, p);
   };
 
-  zoom.scaleTo = function(selection$$1, k) {
-    zoom.transform(selection$$1, function() {
+  zoom.scaleTo = function(selection, k, p) {
+    zoom.transform(selection, function() {
       var e = extent.apply(this, arguments),
           t0 = this.__zoom,
-          p0 = centroid(e),
+          p0 = p == null ? centroid(e) : typeof p === "function" ? p.apply(this, arguments) : p,
           p1 = t0.invert(p0),
           k1 = typeof k === "function" ? k.apply(this, arguments) : k;
       return constrain(translate(scale(t0, k1), p0, p1), e, translateExtent);
-    });
+    }, p);
   };
 
-  zoom.translateBy = function(selection$$1, x, y) {
-    zoom.transform(selection$$1, function() {
+  zoom.translateBy = function(selection, x, y) {
+    zoom.transform(selection, function() {
       return constrain(this.__zoom.translate(
         typeof x === "function" ? x.apply(this, arguments) : x,
         typeof y === "function" ? y.apply(this, arguments) : y
@@ -17503,16 +17774,16 @@ function zoom() {
     });
   };
 
-  zoom.translateTo = function(selection$$1, x, y) {
-    zoom.transform(selection$$1, function() {
+  zoom.translateTo = function(selection, x, y, p) {
+    zoom.transform(selection, function() {
       var e = extent.apply(this, arguments),
           t = this.__zoom,
-          p = centroid(e);
-      return constrain(identity$9.translate(p[0], p[1]).scale(t.k).translate(
+          p0 = p == null ? centroid(e) : typeof p === "function" ? p.apply(this, arguments) : p;
+      return constrain(identity$9.translate(p0[0], p0[1]).scale(t.k).translate(
         typeof x === "function" ? -x.apply(this, arguments) : -x,
         typeof y === "function" ? -y.apply(this, arguments) : -y
       ), e, translateExtent);
-    });
+    }, p);
   };
 
   function scale(transform, k) {
@@ -17529,8 +17800,8 @@ function zoom() {
     return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
   }
 
-  function schedule(transition$$1, transform, center) {
-    transition$$1
+  function schedule(transition, transform, point) {
+    transition
         .on("start.zoom", function() { gesture(this, arguments).start(); })
         .on("interrupt.zoom end.zoom", function() { gesture(this, arguments).end(); })
         .tween("zoom", function() {
@@ -17538,7 +17809,7 @@ function zoom() {
               args = arguments,
               g = gesture(that, args),
               e = extent.apply(that, args),
-              p = center || centroid(e),
+              p = point == null ? centroid(e) : typeof point === "function" ? point.apply(that, args) : point,
               w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
               a = that.__zoom,
               b = typeof transform === "function" ? transform.apply(that, args) : transform,
@@ -17551,27 +17822,22 @@ function zoom() {
         });
   }
 
-  function gesture(that, args) {
-    for (var i = 0, n = gestures.length, g; i < n; ++i) {
-      if ((g = gestures[i]).that === that) {
-        return g;
-      }
-    }
-    return new Gesture(that, args);
+  function gesture(that, args, clean) {
+    return (!clean && that.__zooming) || new Gesture(that, args);
   }
 
   function Gesture(that, args) {
     this.that = that;
     this.args = args;
-    this.index = -1;
     this.active = 0;
     this.extent = extent.apply(that, args);
+    this.taps = 0;
   }
 
   Gesture.prototype = {
     start: function() {
       if (++this.active === 1) {
-        this.index = gestures.push(this) - 1;
+        this.that.__zooming = this;
         this.emit("start");
       }
       return this;
@@ -17586,8 +17852,7 @@ function zoom() {
     },
     end: function() {
       if (--this.active === 0) {
-        gestures.splice(this.index, 1);
-        this.index = -1;
+        delete this.that.__zooming;
         this.emit("end");
       }
       return this;
@@ -17635,7 +17900,7 @@ function zoom() {
 
   function mousedowned() {
     if (touchending || !filter.apply(this, arguments)) return;
-    var g = gesture(this, arguments),
+    var g = gesture(this, arguments, true),
         v = select(exports.event.view).on("mousemove.zoom", mousemoved, true).on("mouseup.zoom", mouseupped, true),
         p = mouse(this),
         x0 = exports.event.clientX,
@@ -17679,46 +17944,39 @@ function zoom() {
 
   function touchstarted() {
     if (!filter.apply(this, arguments)) return;
-    var g = gesture(this, arguments),
-        touches$$1 = exports.event.changedTouches,
-        started,
-        n = touches$$1.length, i, t, p;
+    var touches = exports.event.touches,
+        n = touches.length,
+        g = gesture(this, arguments, exports.event.changedTouches.length === n),
+        started, i, t, p;
 
     nopropagation$2();
     for (i = 0; i < n; ++i) {
-      t = touches$$1[i], p = touch(this, touches$$1, t.identifier);
+      t = touches[i], p = touch(this, touches, t.identifier);
       p = [p, this.__zoom.invert(p), t.identifier];
-      if (!g.touch0) g.touch0 = p, started = true;
-      else if (!g.touch1) g.touch1 = p;
+      if (!g.touch0) g.touch0 = p, started = true, g.taps = 1 + !!touchstarting;
+      else if (!g.touch1 && g.touch0[2] !== p[2]) g.touch1 = p, g.taps = 0;
     }
 
-    // If this is a dbltap, reroute to the (optional) dblclick.zoom handler.
-    if (touchstarting) {
-      touchstarting = clearTimeout(touchstarting);
-      if (!g.touch1) {
-        g.end();
-        p = select(this).on("dblclick.zoom");
-        if (p) p.apply(this, arguments);
-        return;
-      }
-    }
+    if (touchstarting) touchstarting = clearTimeout(touchstarting);
 
     if (started) {
-      touchstarting = setTimeout(function() { touchstarting = null; }, touchDelay);
+      if (g.taps < 2) touchstarting = setTimeout(function() { touchstarting = null; }, touchDelay);
       interrupt(this);
       g.start();
     }
   }
 
   function touchmoved() {
+    if (!this.__zooming) return;
     var g = gesture(this, arguments),
-        touches$$1 = exports.event.changedTouches,
-        n = touches$$1.length, i, t, p, l;
+        touches = exports.event.changedTouches,
+        n = touches.length, i, t, p, l;
 
     noevent$2();
     if (touchstarting) touchstarting = clearTimeout(touchstarting);
+    g.taps = 0;
     for (i = 0; i < n; ++i) {
-      t = touches$$1[i], p = touch(this, touches$$1, t.identifier);
+      t = touches[i], p = touch(this, touches, t.identifier);
       if (g.touch0 && g.touch0[2] === t.identifier) g.touch0[0] = p;
       else if (g.touch1 && g.touch1[2] === t.identifier) g.touch1[0] = p;
     }
@@ -17738,21 +17996,29 @@ function zoom() {
   }
 
   function touchended() {
+    if (!this.__zooming) return;
     var g = gesture(this, arguments),
-        touches$$1 = exports.event.changedTouches,
-        n = touches$$1.length, i, t;
+        touches = exports.event.changedTouches,
+        n = touches.length, i, t;
 
     nopropagation$2();
     if (touchending) clearTimeout(touchending);
     touchending = setTimeout(function() { touchending = null; }, touchDelay);
     for (i = 0; i < n; ++i) {
-      t = touches$$1[i];
+      t = touches[i];
       if (g.touch0 && g.touch0[2] === t.identifier) delete g.touch0;
       else if (g.touch1 && g.touch1[2] === t.identifier) delete g.touch1;
     }
     if (g.touch1 && !g.touch0) g.touch0 = g.touch1, delete g.touch1;
     if (g.touch0) g.touch0[1] = this.__zoom.invert(g.touch0[0]);
-    else g.end();
+    else {
+      g.end();
+      // If this was a dbltap, reroute to the (optional) dblclick.zoom handler.
+      if (g.taps === 2) {
+        var p = select(this).on("dblclick.zoom");
+        if (p) p.apply(this, arguments);
+      }
+    }
   }
 
   zoom.wheelDelta = function(_) {
@@ -17803,128 +18069,111 @@ function zoom() {
   return zoom;
 }
 
-exports.version = version;
-exports.bisect = bisectRight;
-exports.bisectRight = bisectRight;
-exports.bisectLeft = bisectLeft;
+exports.FormatSpecifier = FormatSpecifier;
+exports.active = active;
+exports.arc = arc;
+exports.area = area$3;
+exports.areaRadial = areaRadial;
 exports.ascending = ascending;
-exports.bisector = bisector;
-exports.cross = cross;
-exports.descending = descending;
-exports.deviation = deviation;
-exports.extent = extent;
-exports.histogram = histogram;
-exports.thresholdFreedmanDiaconis = freedmanDiaconis;
-exports.thresholdScott = scott;
-exports.thresholdSturges = thresholdSturges;
-exports.max = max;
-exports.mean = mean;
-exports.median = median;
-exports.merge = merge;
-exports.min = min;
-exports.pairs = pairs;
-exports.permute = permute;
-exports.quantile = threshold;
-exports.range = sequence;
-exports.scan = scan;
-exports.shuffle = shuffle;
-exports.sum = sum;
-exports.ticks = ticks;
-exports.tickIncrement = tickIncrement;
-exports.tickStep = tickStep;
-exports.transpose = transpose;
-exports.variance = variance;
-exports.zip = zip;
-exports.axisTop = axisTop;
-exports.axisRight = axisRight;
+exports.autoType = autoType;
 exports.axisBottom = axisBottom;
 exports.axisLeft = axisLeft;
+exports.axisRight = axisRight;
+exports.axisTop = axisTop;
+exports.bisect = bisectRight;
+exports.bisectLeft = bisectLeft;
+exports.bisectRight = bisectRight;
+exports.bisector = bisector;
+exports.blob = blob;
 exports.brush = brush;
+exports.brushSelection = brushSelection;
 exports.brushX = brushX;
 exports.brushY = brushY;
-exports.brushSelection = brushSelection;
+exports.buffer = buffer;
 exports.chord = chord;
-exports.ribbon = ribbon;
-exports.nest = nest;
-exports.set = set$2;
-exports.map = map$1;
-exports.keys = keys;
-exports.values = values;
-exports.entries = entries;
+exports.clientPoint = point;
+exports.cluster = cluster;
 exports.color = color;
-exports.rgb = rgb;
-exports.hsl = hsl;
-exports.lab = lab;
-exports.hcl = hcl;
-exports.lch = lch;
-exports.gray = gray;
-exports.cubehelix = cubehelix;
-exports.contours = contours;
 exports.contourDensity = density;
+exports.contours = contours;
+exports.create = create;
+exports.creator = creator;
+exports.cross = cross;
+exports.csv = csv$1;
+exports.csvFormat = csvFormat;
+exports.csvFormatBody = csvFormatBody;
+exports.csvFormatRow = csvFormatRow;
+exports.csvFormatRows = csvFormatRows;
+exports.csvFormatValue = csvFormatValue;
+exports.csvParse = csvParse;
+exports.csvParseRows = csvParseRows;
+exports.cubehelix = cubehelix;
+exports.curveBasis = basis$2;
+exports.curveBasisClosed = basisClosed$1;
+exports.curveBasisOpen = basisOpen;
+exports.curveBundle = bundle;
+exports.curveCardinal = cardinal;
+exports.curveCardinalClosed = cardinalClosed;
+exports.curveCardinalOpen = cardinalOpen;
+exports.curveCatmullRom = catmullRom;
+exports.curveCatmullRomClosed = catmullRomClosed;
+exports.curveCatmullRomOpen = catmullRomOpen;
+exports.curveLinear = curveLinear;
+exports.curveLinearClosed = linearClosed;
+exports.curveMonotoneX = monotoneX;
+exports.curveMonotoneY = monotoneY;
+exports.curveNatural = natural;
+exports.curveStep = step;
+exports.curveStepAfter = stepAfter;
+exports.curveStepBefore = stepBefore;
+exports.customEvent = customEvent;
+exports.descending = descending;
+exports.deviation = deviation;
 exports.dispatch = dispatch;
 exports.drag = drag;
 exports.dragDisable = dragDisable;
 exports.dragEnable = yesdrag;
+exports.dsv = dsv;
 exports.dsvFormat = dsvFormat;
-exports.csvParse = csvParse;
-exports.csvParseRows = csvParseRows;
-exports.csvFormat = csvFormat;
-exports.csvFormatBody = csvFormatBody;
-exports.csvFormatRows = csvFormatRows;
-exports.tsvParse = tsvParse;
-exports.tsvParseRows = tsvParseRows;
-exports.tsvFormat = tsvFormat;
-exports.tsvFormatBody = tsvFormatBody;
-exports.tsvFormatRows = tsvFormatRows;
-exports.autoType = autoType;
-exports.easeLinear = linear$1;
-exports.easeQuad = quadInOut;
-exports.easeQuadIn = quadIn;
-exports.easeQuadOut = quadOut;
-exports.easeQuadInOut = quadInOut;
+exports.easeBack = backInOut;
+exports.easeBackIn = backIn;
+exports.easeBackInOut = backInOut;
+exports.easeBackOut = backOut;
+exports.easeBounce = bounceOut;
+exports.easeBounceIn = bounceIn;
+exports.easeBounceInOut = bounceInOut;
+exports.easeBounceOut = bounceOut;
+exports.easeCircle = circleInOut;
+exports.easeCircleIn = circleIn;
+exports.easeCircleInOut = circleInOut;
+exports.easeCircleOut = circleOut;
 exports.easeCubic = cubicInOut;
 exports.easeCubicIn = cubicIn;
-exports.easeCubicOut = cubicOut;
 exports.easeCubicInOut = cubicInOut;
+exports.easeCubicOut = cubicOut;
+exports.easeElastic = elasticOut;
+exports.easeElasticIn = elasticIn;
+exports.easeElasticInOut = elasticInOut;
+exports.easeElasticOut = elasticOut;
+exports.easeExp = expInOut;
+exports.easeExpIn = expIn;
+exports.easeExpInOut = expInOut;
+exports.easeExpOut = expOut;
+exports.easeLinear = linear$1;
 exports.easePoly = polyInOut;
 exports.easePolyIn = polyIn;
-exports.easePolyOut = polyOut;
 exports.easePolyInOut = polyInOut;
+exports.easePolyOut = polyOut;
+exports.easeQuad = quadInOut;
+exports.easeQuadIn = quadIn;
+exports.easeQuadInOut = quadInOut;
+exports.easeQuadOut = quadOut;
 exports.easeSin = sinInOut;
 exports.easeSinIn = sinIn;
-exports.easeSinOut = sinOut;
 exports.easeSinInOut = sinInOut;
-exports.easeExp = expInOut;
-exports.easeExpIn = expIn;
-exports.easeExpOut = expOut;
-exports.easeExpInOut = expInOut;
-exports.easeCircle = circleInOut;
-exports.easeCircleIn = circleIn;
-exports.easeCircleOut = circleOut;
-exports.easeCircleInOut = circleInOut;
-exports.easeBounce = bounceOut;
-exports.easeBounceIn = bounceIn;
-exports.easeBounceOut = bounceOut;
-exports.easeBounceInOut = bounceInOut;
-exports.easeBack = backInOut;
-exports.easeBackIn = backIn;
-exports.easeBackOut = backOut;
-exports.easeBackInOut = backInOut;
-exports.easeElastic = elasticOut;
-exports.easeElasticIn = elasticIn;
-exports.easeElasticOut = elasticOut;
-exports.easeElasticInOut = elasticInOut;
-exports.blob = blob;
-exports.buffer = buffer;
-exports.dsv = dsv;
-exports.csv = csv$1;
-exports.tsv = tsv$1;
-exports.image = image;
-exports.json = json;
-exports.text = text;
-exports.xml = xml;
-exports.html = html;
-exports.svg = svg;
+exports.easeSinOut = sinOut;
+exports.entries = entries;
+exports.extent = extent;
 exports.forceCenter = center$1;
 exports.forceCollide = collide;
 exports.forceLink = link;
@@ -17936,10 +18185,13 @@ exports.forceY = y$2;
 exports.formatDefaultLocale = defaultLocale;
 exports.formatLocale = formatLocale;
 exports.formatSpecifier = formatSpecifier;
-exports.precisionFixed = precisionFixed;
-exports.precisionPrefix = precisionPrefix;
-exports.precisionRound = precisionRound;
+exports.geoAlbers = albers;
+exports.geoAlbersUsa = albersUsa;
 exports.geoArea = area$1;
+exports.geoAzimuthalEqualArea = azimuthalEqualArea;
+exports.geoAzimuthalEqualAreaRaw = azimuthalEqualAreaRaw;
+exports.geoAzimuthalEquidistant = azimuthalEquidistant;
+exports.geoAzimuthalEquidistantRaw = azimuthalEquidistantRaw;
 exports.geoBounds = bounds;
 exports.geoCentroid = centroid;
 exports.geoCircle = circle;
@@ -17947,260 +18199,243 @@ exports.geoClipAntimeridian = clipAntimeridian;
 exports.geoClipCircle = clipCircle;
 exports.geoClipExtent = extent$1;
 exports.geoClipRectangle = clipRectangle;
-exports.geoContains = contains$1;
-exports.geoDistance = distance;
-exports.geoGraticule = graticule;
-exports.geoGraticule10 = graticule10;
-exports.geoInterpolate = interpolate$1;
-exports.geoLength = length$1;
-exports.geoPath = index$1;
-exports.geoAlbers = albers;
-exports.geoAlbersUsa = albersUsa;
-exports.geoAzimuthalEqualArea = azimuthalEqualArea;
-exports.geoAzimuthalEqualAreaRaw = azimuthalEqualAreaRaw;
-exports.geoAzimuthalEquidistant = azimuthalEquidistant;
-exports.geoAzimuthalEquidistantRaw = azimuthalEquidistantRaw;
 exports.geoConicConformal = conicConformal;
 exports.geoConicConformalRaw = conicConformalRaw;
 exports.geoConicEqualArea = conicEqualArea;
 exports.geoConicEqualAreaRaw = conicEqualAreaRaw;
 exports.geoConicEquidistant = conicEquidistant;
 exports.geoConicEquidistantRaw = conicEquidistantRaw;
+exports.geoContains = contains$1;
+exports.geoDistance = distance;
 exports.geoEqualEarth = equalEarth;
 exports.geoEqualEarthRaw = equalEarthRaw;
 exports.geoEquirectangular = equirectangular;
 exports.geoEquirectangularRaw = equirectangularRaw;
 exports.geoGnomonic = gnomonic;
 exports.geoGnomonicRaw = gnomonicRaw;
+exports.geoGraticule = graticule;
+exports.geoGraticule10 = graticule10;
 exports.geoIdentity = identity$5;
-exports.geoProjection = projection;
-exports.geoProjectionMutator = projectionMutator;
+exports.geoInterpolate = interpolate$1;
+exports.geoLength = length$1;
 exports.geoMercator = mercator;
 exports.geoMercatorRaw = mercatorRaw;
 exports.geoNaturalEarth1 = naturalEarth1;
 exports.geoNaturalEarth1Raw = naturalEarth1Raw;
 exports.geoOrthographic = orthographic;
 exports.geoOrthographicRaw = orthographicRaw;
+exports.geoPath = index$1;
+exports.geoProjection = projection;
+exports.geoProjectionMutator = projectionMutator;
+exports.geoRotation = rotation;
 exports.geoStereographic = stereographic;
 exports.geoStereographicRaw = stereographicRaw;
-exports.geoTransverseMercator = transverseMercator;
-exports.geoTransverseMercatorRaw = transverseMercatorRaw;
-exports.geoRotation = rotation;
 exports.geoStream = geoStream;
 exports.geoTransform = transform;
-exports.cluster = cluster;
+exports.geoTransverseMercator = transverseMercator;
+exports.geoTransverseMercatorRaw = transverseMercatorRaw;
+exports.gray = gray;
+exports.hcl = hcl;
 exports.hierarchy = hierarchy;
-exports.pack = index$2;
-exports.packSiblings = siblings;
-exports.packEnclose = enclose;
-exports.partition = partition;
-exports.stratify = stratify;
-exports.tree = tree;
-exports.treemap = index$3;
-exports.treemapBinary = binary;
-exports.treemapDice = treemapDice;
-exports.treemapSlice = treemapSlice;
-exports.treemapSliceDice = sliceDice;
-exports.treemapSquarify = squarify;
-exports.treemapResquarify = resquarify;
+exports.histogram = histogram;
+exports.hsl = hsl;
+exports.html = html;
+exports.image = image;
 exports.interpolate = interpolateValue;
 exports.interpolateArray = array$1;
 exports.interpolateBasis = basis$1;
 exports.interpolateBasisClosed = basisClosed;
+exports.interpolateBlues = Blues;
+exports.interpolateBrBG = BrBG;
+exports.interpolateBuGn = BuGn;
+exports.interpolateBuPu = BuPu;
+exports.interpolateCividis = cividis;
+exports.interpolateCool = cool;
+exports.interpolateCubehelix = cubehelix$2;
+exports.interpolateCubehelixDefault = cubehelix$3;
+exports.interpolateCubehelixLong = cubehelixLong;
 exports.interpolateDate = date;
 exports.interpolateDiscrete = discrete;
+exports.interpolateGnBu = GnBu;
+exports.interpolateGreens = Greens;
+exports.interpolateGreys = Greys;
+exports.interpolateHcl = hcl$2;
+exports.interpolateHclLong = hclLong;
+exports.interpolateHsl = hsl$2;
+exports.interpolateHslLong = hslLong;
 exports.interpolateHue = hue$1;
+exports.interpolateInferno = inferno;
+exports.interpolateLab = lab$1;
+exports.interpolateMagma = magma;
 exports.interpolateNumber = interpolateNumber;
+exports.interpolateNumberArray = numberArray;
 exports.interpolateObject = object;
+exports.interpolateOrRd = OrRd;
+exports.interpolateOranges = Oranges;
+exports.interpolatePRGn = PRGn;
+exports.interpolatePiYG = PiYG;
+exports.interpolatePlasma = plasma;
+exports.interpolatePuBu = PuBu;
+exports.interpolatePuBuGn = PuBuGn;
+exports.interpolatePuOr = PuOr;
+exports.interpolatePuRd = PuRd;
+exports.interpolatePurples = Purples;
+exports.interpolateRainbow = rainbow;
+exports.interpolateRdBu = RdBu;
+exports.interpolateRdGy = RdGy;
+exports.interpolateRdPu = RdPu;
+exports.interpolateRdYlBu = RdYlBu;
+exports.interpolateRdYlGn = RdYlGn;
+exports.interpolateReds = Reds;
+exports.interpolateRgb = interpolateRgb;
+exports.interpolateRgbBasis = rgbBasis;
+exports.interpolateRgbBasisClosed = rgbBasisClosed;
 exports.interpolateRound = interpolateRound;
+exports.interpolateSinebow = sinebow;
+exports.interpolateSpectral = Spectral;
 exports.interpolateString = interpolateString;
 exports.interpolateTransformCss = interpolateTransformCss;
 exports.interpolateTransformSvg = interpolateTransformSvg;
+exports.interpolateTurbo = turbo;
+exports.interpolateViridis = viridis;
+exports.interpolateWarm = warm;
+exports.interpolateYlGn = YlGn;
+exports.interpolateYlGnBu = YlGnBu;
+exports.interpolateYlOrBr = YlOrBr;
+exports.interpolateYlOrRd = YlOrRd;
 exports.interpolateZoom = interpolateZoom;
-exports.interpolateRgb = interpolateRgb;
-exports.interpolateRgbBasis = rgbBasis;
-exports.interpolateRgbBasisClosed = rgbBasisClosed;
-exports.interpolateHsl = hsl$2;
-exports.interpolateHslLong = hslLong;
-exports.interpolateLab = lab$1;
-exports.interpolateHcl = hcl$2;
-exports.interpolateHclLong = hclLong;
-exports.interpolateCubehelix = cubehelix$2;
-exports.interpolateCubehelixLong = cubehelixLong;
-exports.piecewise = piecewise;
-exports.quantize = quantize;
-exports.path = path;
-exports.polygonArea = area$2;
-exports.polygonCentroid = centroid$1;
-exports.polygonHull = hull;
-exports.polygonContains = contains$2;
-exports.polygonLength = length$2;
-exports.quadtree = quadtree;
-exports.randomUniform = uniform;
-exports.randomNormal = normal;
-exports.randomLogNormal = logNormal;
+exports.interrupt = interrupt;
+exports.interval = interval$1;
+exports.isoFormat = formatIso;
+exports.isoParse = parseIso;
+exports.json = json;
+exports.keys = keys;
+exports.lab = lab;
+exports.lch = lch;
+exports.line = line;
+exports.lineRadial = lineRadial$1;
+exports.linkHorizontal = linkHorizontal;
+exports.linkRadial = linkRadial;
+exports.linkVertical = linkVertical;
+exports.local = local;
+exports.map = map$1;
+exports.matcher = matcher;
+exports.max = max;
+exports.mean = mean;
+exports.median = median;
+exports.merge = merge;
+exports.min = min;
+exports.mouse = mouse;
+exports.namespace = namespace;
+exports.namespaces = namespaces;
+exports.nest = nest;
+exports.now = now;
+exports.pack = index$2;
+exports.packEnclose = enclose;
+exports.packSiblings = siblings;
+exports.pairs = pairs;
+exports.partition = partition;
+exports.path = path;
+exports.permute = permute;
+exports.pie = pie;
+exports.piecewise = piecewise;
+exports.pointRadial = pointRadial;
+exports.polygonArea = area$2;
+exports.polygonCentroid = centroid$1;
+exports.polygonContains = contains$2;
+exports.polygonHull = hull;
+exports.polygonLength = length$2;
+exports.precisionFixed = precisionFixed;
+exports.precisionPrefix = precisionPrefix;
+exports.precisionRound = precisionRound;
+exports.quadtree = quadtree;
+exports.quantile = threshold;
+exports.quantize = quantize;
+exports.radialArea = areaRadial;
+exports.radialLine = lineRadial$1;
 exports.randomBates = bates;
-exports.randomIrwinHall = irwinHall;
 exports.randomExponential = exponential$1;
+exports.randomIrwinHall = irwinHall;
+exports.randomLogNormal = logNormal;
+exports.randomNormal = normal;
+exports.randomUniform = uniform;
+exports.range = sequence;
+exports.rgb = rgb;
+exports.ribbon = ribbon;
 exports.scaleBand = band;
-exports.scalePoint = point$1;
+exports.scaleDiverging = diverging;
+exports.scaleDivergingLog = divergingLog;
+exports.scaleDivergingPow = divergingPow;
+exports.scaleDivergingSqrt = divergingSqrt;
+exports.scaleDivergingSymlog = divergingSymlog;
 exports.scaleIdentity = identity$7;
+exports.scaleImplicit = implicit;
 exports.scaleLinear = linear$2;
 exports.scaleLog = log$1;
-exports.scaleSymlog = symlog;
 exports.scaleOrdinal = ordinal;
-exports.scaleImplicit = implicit;
+exports.scalePoint = point$1;
 exports.scalePow = pow$1;
-exports.scaleSqrt = sqrt$1;
-exports.scaleQuantile = quantile$$1;
+exports.scaleQuantile = quantile;
 exports.scaleQuantize = quantize$1;
-exports.scaleThreshold = threshold$1;
-exports.scaleTime = time;
-exports.scaleUtc = utcTime;
 exports.scaleSequential = sequential;
 exports.scaleSequentialLog = sequentialLog;
 exports.scaleSequentialPow = sequentialPow;
+exports.scaleSequentialQuantile = sequentialQuantile;
 exports.scaleSequentialSqrt = sequentialSqrt;
 exports.scaleSequentialSymlog = sequentialSymlog;
-exports.scaleSequentialQuantile = sequentialQuantile;
-exports.scaleDiverging = diverging;
-exports.scaleDivergingLog = divergingLog;
-exports.scaleDivergingPow = divergingPow;
-exports.scaleDivergingSqrt = divergingSqrt;
-exports.scaleDivergingSymlog = divergingSymlog;
-exports.tickFormat = tickFormat;
-exports.schemeCategory10 = category10;
+exports.scaleSqrt = sqrt$1;
+exports.scaleSymlog = symlog;
+exports.scaleThreshold = threshold$1;
+exports.scaleTime = time;
+exports.scaleUtc = utcTime;
+exports.scan = scan;
 exports.schemeAccent = Accent;
+exports.schemeBlues = scheme$l;
+exports.schemeBrBG = scheme;
+exports.schemeBuGn = scheme$9;
+exports.schemeBuPu = scheme$a;
+exports.schemeCategory10 = category10;
 exports.schemeDark2 = Dark2;
+exports.schemeGnBu = scheme$b;
+exports.schemeGreens = scheme$m;
+exports.schemeGreys = scheme$n;
+exports.schemeOrRd = scheme$c;
+exports.schemeOranges = scheme$q;
+exports.schemePRGn = scheme$1;
 exports.schemePaired = Paired;
 exports.schemePastel1 = Pastel1;
 exports.schemePastel2 = Pastel2;
-exports.schemeSet1 = Set1;
-exports.schemeSet2 = Set2;
-exports.schemeSet3 = Set3;
-exports.interpolateBrBG = BrBG;
-exports.schemeBrBG = scheme;
-exports.interpolatePRGn = PRGn;
-exports.schemePRGn = scheme$1;
-exports.interpolatePiYG = PiYG;
 exports.schemePiYG = scheme$2;
-exports.interpolatePuOr = PuOr;
+exports.schemePuBu = scheme$e;
+exports.schemePuBuGn = scheme$d;
 exports.schemePuOr = scheme$3;
-exports.interpolateRdBu = RdBu;
+exports.schemePuRd = scheme$f;
+exports.schemePurples = scheme$o;
 exports.schemeRdBu = scheme$4;
-exports.interpolateRdGy = RdGy;
 exports.schemeRdGy = scheme$5;
-exports.interpolateRdYlBu = RdYlBu;
+exports.schemeRdPu = scheme$g;
 exports.schemeRdYlBu = scheme$6;
-exports.interpolateRdYlGn = RdYlGn;
 exports.schemeRdYlGn = scheme$7;
-exports.interpolateSpectral = Spectral;
+exports.schemeReds = scheme$p;
+exports.schemeSet1 = Set1;
+exports.schemeSet2 = Set2;
+exports.schemeSet3 = Set3;
 exports.schemeSpectral = scheme$8;
-exports.interpolateBuGn = BuGn;
-exports.schemeBuGn = scheme$9;
-exports.interpolateBuPu = BuPu;
-exports.schemeBuPu = scheme$a;
-exports.interpolateGnBu = GnBu;
-exports.schemeGnBu = scheme$b;
-exports.interpolateOrRd = OrRd;
-exports.schemeOrRd = scheme$c;
-exports.interpolatePuBuGn = PuBuGn;
-exports.schemePuBuGn = scheme$d;
-exports.interpolatePuBu = PuBu;
-exports.schemePuBu = scheme$e;
-exports.interpolatePuRd = PuRd;
-exports.schemePuRd = scheme$f;
-exports.interpolateRdPu = RdPu;
-exports.schemeRdPu = scheme$g;
-exports.interpolateYlGnBu = YlGnBu;
-exports.schemeYlGnBu = scheme$h;
-exports.interpolateYlGn = YlGn;
+exports.schemeTableau10 = Tableau10;
 exports.schemeYlGn = scheme$i;
-exports.interpolateYlOrBr = YlOrBr;
+exports.schemeYlGnBu = scheme$h;
 exports.schemeYlOrBr = scheme$j;
-exports.interpolateYlOrRd = YlOrRd;
 exports.schemeYlOrRd = scheme$k;
-exports.interpolateBlues = Blues;
-exports.schemeBlues = scheme$l;
-exports.interpolateGreens = Greens;
-exports.schemeGreens = scheme$m;
-exports.interpolateGreys = Greys;
-exports.schemeGreys = scheme$n;
-exports.interpolatePurples = Purples;
-exports.schemePurples = scheme$o;
-exports.interpolateReds = Reds;
-exports.schemeReds = scheme$p;
-exports.interpolateOranges = Oranges;
-exports.schemeOranges = scheme$q;
-exports.interpolateCubehelixDefault = cubehelix$3;
-exports.interpolateRainbow = rainbow;
-exports.interpolateWarm = warm;
-exports.interpolateCool = cool;
-exports.interpolateSinebow = sinebow;
-exports.interpolateViridis = viridis;
-exports.interpolateMagma = magma;
-exports.interpolateInferno = inferno;
-exports.interpolatePlasma = plasma;
-exports.create = create;
-exports.creator = creator;
-exports.local = local;
-exports.matcher = matcher;
-exports.mouse = mouse;
-exports.namespace = namespace;
-exports.namespaces = namespaces;
-exports.clientPoint = point;
 exports.select = select;
 exports.selectAll = selectAll;
 exports.selection = selection;
 exports.selector = selector;
 exports.selectorAll = selectorAll;
-exports.style = styleValue;
-exports.touch = touch;
-exports.touches = touches;
-exports.window = defaultView;
-exports.customEvent = customEvent;
-exports.arc = arc;
-exports.area = area$3;
-exports.line = line;
-exports.pie = pie;
-exports.areaRadial = areaRadial;
-exports.radialArea = areaRadial;
-exports.lineRadial = lineRadial$1;
-exports.radialLine = lineRadial$1;
-exports.pointRadial = pointRadial;
-exports.linkHorizontal = linkHorizontal;
-exports.linkVertical = linkVertical;
-exports.linkRadial = linkRadial;
-exports.symbol = symbol;
-exports.symbols = symbols;
-exports.symbolCircle = circle$2;
-exports.symbolCross = cross$2;
-exports.symbolDiamond = diamond;
-exports.symbolSquare = square;
-exports.symbolStar = star;
-exports.symbolTriangle = triangle;
-exports.symbolWye = wye;
-exports.curveBasisClosed = basisClosed$1;
-exports.curveBasisOpen = basisOpen;
-exports.curveBasis = basis$2;
-exports.curveBundle = bundle;
-exports.curveCardinalClosed = cardinalClosed;
-exports.curveCardinalOpen = cardinalOpen;
-exports.curveCardinal = cardinal;
-exports.curveCatmullRomClosed = catmullRomClosed;
-exports.curveCatmullRomOpen = catmullRomOpen;
-exports.curveCatmullRom = catmullRom;
-exports.curveLinearClosed = linearClosed;
-exports.curveLinear = curveLinear;
-exports.curveMonotoneX = monotoneX;
-exports.curveMonotoneY = monotoneY;
-exports.curveNatural = natural;
-exports.curveStep = step;
-exports.curveStepAfter = stepAfter;
-exports.curveStepBefore = stepBefore;
+exports.set = set$2;
+exports.shuffle = shuffle;
 exports.stack = stack;
-exports.stackOffsetExpand = expand;
 exports.stackOffsetDiverging = diverging$1;
+exports.stackOffsetExpand = expand;
 exports.stackOffsetNone = none$1;
 exports.stackOffsetSilhouette = silhouette;
 exports.stackOffsetWiggle = wiggle;
@@ -18210,84 +18445,124 @@ exports.stackOrderDescending = descending$2;
 exports.stackOrderInsideOut = insideOut;
 exports.stackOrderNone = none$2;
 exports.stackOrderReverse = reverse;
+exports.stratify = stratify;
+exports.style = styleValue;
+exports.sum = sum;
+exports.svg = svg;
+exports.symbol = symbol;
+exports.symbolCircle = circle$2;
+exports.symbolCross = cross$2;
+exports.symbolDiamond = diamond;
+exports.symbolSquare = square;
+exports.symbolStar = star;
+exports.symbolTriangle = triangle;
+exports.symbolWye = wye;
+exports.symbols = symbols;
+exports.text = text;
+exports.thresholdFreedmanDiaconis = freedmanDiaconis;
+exports.thresholdScott = scott;
+exports.thresholdSturges = thresholdSturges;
+exports.tickFormat = tickFormat;
+exports.tickIncrement = tickIncrement;
+exports.tickStep = tickStep;
+exports.ticks = ticks;
+exports.timeDay = day;
+exports.timeDays = days;
+exports.timeFormatDefaultLocale = defaultLocale$1;
+exports.timeFormatLocale = formatLocale$1;
+exports.timeFriday = friday;
+exports.timeFridays = fridays;
+exports.timeHour = hour;
+exports.timeHours = hours;
 exports.timeInterval = newInterval;
 exports.timeMillisecond = millisecond;
 exports.timeMilliseconds = milliseconds;
-exports.utcMillisecond = millisecond;
-exports.utcMilliseconds = milliseconds;
-exports.timeSecond = second;
-exports.timeSeconds = seconds;
-exports.utcSecond = second;
-exports.utcSeconds = seconds;
 exports.timeMinute = minute;
 exports.timeMinutes = minutes;
-exports.timeHour = hour;
-exports.timeHours = hours;
-exports.timeDay = day;
-exports.timeDays = days;
-exports.timeWeek = sunday;
-exports.timeWeeks = sundays;
-exports.timeSunday = sunday;
-exports.timeSundays = sundays;
 exports.timeMonday = monday;
 exports.timeMondays = mondays;
+exports.timeMonth = month;
+exports.timeMonths = months;
+exports.timeSaturday = saturday;
+exports.timeSaturdays = saturdays;
+exports.timeSecond = second;
+exports.timeSeconds = seconds;
+exports.timeSunday = sunday;
+exports.timeSundays = sundays;
+exports.timeThursday = thursday;
+exports.timeThursdays = thursdays;
 exports.timeTuesday = tuesday;
 exports.timeTuesdays = tuesdays;
 exports.timeWednesday = wednesday;
 exports.timeWednesdays = wednesdays;
-exports.timeThursday = thursday;
-exports.timeThursdays = thursdays;
-exports.timeFriday = friday;
-exports.timeFridays = fridays;
-exports.timeSaturday = saturday;
-exports.timeSaturdays = saturdays;
-exports.timeMonth = month;
-exports.timeMonths = months;
+exports.timeWeek = sunday;
+exports.timeWeeks = sundays;
 exports.timeYear = year;
 exports.timeYears = years;
-exports.utcMinute = utcMinute;
-exports.utcMinutes = utcMinutes;
-exports.utcHour = utcHour;
-exports.utcHours = utcHours;
+exports.timeout = timeout$1;
+exports.timer = timer;
+exports.timerFlush = timerFlush;
+exports.touch = touch;
+exports.touches = touches;
+exports.transition = transition;
+exports.transpose = transpose;
+exports.tree = tree;
+exports.treemap = index$3;
+exports.treemapBinary = binary;
+exports.treemapDice = treemapDice;
+exports.treemapResquarify = resquarify;
+exports.treemapSlice = treemapSlice;
+exports.treemapSliceDice = sliceDice;
+exports.treemapSquarify = squarify;
+exports.tsv = tsv$1;
+exports.tsvFormat = tsvFormat;
+exports.tsvFormatBody = tsvFormatBody;
+exports.tsvFormatRow = tsvFormatRow;
+exports.tsvFormatRows = tsvFormatRows;
+exports.tsvFormatValue = tsvFormatValue;
+exports.tsvParse = tsvParse;
+exports.tsvParseRows = tsvParseRows;
 exports.utcDay = utcDay;
 exports.utcDays = utcDays;
-exports.utcWeek = utcSunday;
-exports.utcWeeks = utcSundays;
-exports.utcSunday = utcSunday;
-exports.utcSundays = utcSundays;
+exports.utcFriday = utcFriday;
+exports.utcFridays = utcFridays;
+exports.utcHour = utcHour;
+exports.utcHours = utcHours;
+exports.utcMillisecond = millisecond;
+exports.utcMilliseconds = milliseconds;
+exports.utcMinute = utcMinute;
+exports.utcMinutes = utcMinutes;
 exports.utcMonday = utcMonday;
 exports.utcMondays = utcMondays;
+exports.utcMonth = utcMonth;
+exports.utcMonths = utcMonths;
+exports.utcSaturday = utcSaturday;
+exports.utcSaturdays = utcSaturdays;
+exports.utcSecond = second;
+exports.utcSeconds = seconds;
+exports.utcSunday = utcSunday;
+exports.utcSundays = utcSundays;
+exports.utcThursday = utcThursday;
+exports.utcThursdays = utcThursdays;
 exports.utcTuesday = utcTuesday;
 exports.utcTuesdays = utcTuesdays;
 exports.utcWednesday = utcWednesday;
 exports.utcWednesdays = utcWednesdays;
-exports.utcThursday = utcThursday;
-exports.utcThursdays = utcThursdays;
-exports.utcFriday = utcFriday;
-exports.utcFridays = utcFridays;
-exports.utcSaturday = utcSaturday;
-exports.utcSaturdays = utcSaturdays;
-exports.utcMonth = utcMonth;
-exports.utcMonths = utcMonths;
+exports.utcWeek = utcSunday;
+exports.utcWeeks = utcSundays;
 exports.utcYear = utcYear;
 exports.utcYears = utcYears;
-exports.timeFormatDefaultLocale = defaultLocale$1;
-exports.timeFormatLocale = formatLocale$1;
-exports.isoFormat = formatIso;
-exports.isoParse = parseIso;
-exports.now = now;
-exports.timer = timer;
-exports.timerFlush = timerFlush;
-exports.timeout = timeout$1;
-exports.interval = interval$1;
-exports.transition = transition;
-exports.active = active;
-exports.interrupt = interrupt;
+exports.values = values;
+exports.variance = variance;
+exports.version = version;
 exports.voronoi = voronoi;
+exports.window = defaultView;
+exports.xml = xml;
+exports.zip = zip;
 exports.zoom = zoom;
-exports.zoomTransform = transform$1;
 exports.zoomIdentity = identity$9;
+exports.zoomTransform = transform$1;
 
 Object.defineProperty(exports, '__esModule', { value: true });
 
-})));
+}));
diff --git a/app/assets/javascripts/d3.min.js b/app/assets/javascripts/d3.min.js
index 6b882ae..344d26c 100644
--- a/app/assets/javascripts/d3.min.js
+++ b/app/assets/javascripts/d3.min.js
@@ -1,2 +1,2 @@
-// https://d3js.org v5.9.2 Copyright 2019 Mike Bostock
-!function(t,n){"object"==typeof exports&&"undefined"!=typeof module?n(exports):"function"==typeof define&&define.amd?define(["exports"],n):n(t.d3=t.d3||{})}(this,function(t){"use strict";function n(t,n){return t<n?-1:t>n?1:t>=n?0:NaN}function e(t){var e;return 1===t.length&&(e=t,t=function(t,r){return n(e(t),r)}),{left:function(n,e,r,i){for(null==r&&(r=0),null==i&&(i=n.length);r<i;){var o=r+i>>>1;t(n[o],e)<0?r=o+1:i=o}return r},right:function(n,e,r,i){for(null==r&&(r=0),null==i&&(i=n.length);r<i;){var o=r+i>>>1;t(n[o],e)>0?i=o:r=o+1}return r}}}var r=e(n),i=r.right,o=r.left;function a(t,n){return[t,n]}function u(t){return null===t?NaN:+t}function c(t,n){var e,r,i=t.length,o=0,a=-1,c=0,f=0;if(null==n)for(;++a<i;)isNaN(e=u(t[a]))||(f+=(r=e-c)*(e-(c+=r/++o)));else for(;++a<i;)isNaN(e=u(n(t[a],a,t)))||(f+=(r=e-c)*(e-(c+=r/++o)));if(o>1)return f/(o-1)}function f(t,n){var e=c(t,n);return e?Math.sqrt(e):e}function s(t,n){var 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r=(n-t)/Math.max(0,e),i=Math.floor(Math.log(r)/Math.LN10),o=r/Math.pow(10,i);return i>=0?(o>=y?10:o>=_?5:o>=b?2:1)*Math.pow(10,i):-Math.pow(10,-i)/(o>=y?10:o>=_?5:o>=b?2:1)}function w(t,n,e){var r=Math.abs(n-t)/Math.max(0,e),i=Math.pow(10,Math.floor(Math.log(r)/Math.LN10)),o=r/i;return o>=y?i*=10:o>=_?i*=5:o>=b&&(i*=2),n<t?-i:i}function M(t){return Math.ceil(Math.log(t.length)/Math.LN2)+1}function N(t,n,e){if(null==e&&(e=u),r=t.length){if((n=+n)<=0||r<2)return+e(t[0],0,t);if(n>=1)return+e(t[r-1],r-1,t);var r,i=(r-1)*n,o=Math.floor(i),a=+e(t[o],o,t);return a+(+e(t[o+1],o+1,t)-a)*(i-o)}}function A(t,n){var e,r,i=t.length,o=-1;if(null==n){for(;++o<i;)if(null!=(e=t[o])&&e>=e)for(r=e;++o<i;)null!=(e=t[o])&&e>r&&(r=e)}else for(;++o<i;)if(null!=(e=n(t[o],o,t))&&e>=e)for(r=e;++o<i;)null!=(e=n(t[o],o,t))&&e>r&&(r=e);return r}function T(t){for(var n,e,r,i=t.length,o=-1,a=0;++o<i;)a+=t[o].length;for(e=new Array(a);--i>=0;)for(n=(r=t[i]).length;--n>=0;)e[--a]=r[n];return e}function S(t,n){var 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mouseup.zoom",null),jt(t.event.view,n.moved),Jb(),n.end()},!0),a=Bt(this),u=t.event.clientX,c=t.event.clientY;Ht(t.event.view),Kb(),n.mouse=[a,this.__zoom.invert(a)],Pr(this),n.start()}}function T(){if(r.apply(this,arguments)){var n=this.__zoom,e=Bt(this),a=n.invert(e),u=n.k*(t.event.shiftKey?.5:2),c=o(_(y(n,u),e,a),i.apply(this,arguments),f);Jb(),s>0?Rt(this).transition().duration(s).call(m,c,e):Rt(this).call(g.transform,c)}}function A(){if(r.apply(this,arguments)){var e,i,o,a,u=t.event.touches,c=u.length,f=x(this,arguments,t.event.changedTouches.length===c);for(Kb(),i=0;i<c;++i)a=[a=Ft(this,u,(o=u[i]).identifier),this.__zoom.invert(a),o.identifier],f.touch0?f.touch1||f.touch0[2]===a[2]||(f.touch1=a,f.taps=0):(f.touch0=a,e=!0,f.taps=1+!!n);n&&(n=clearTimeout(n)),e&&(f.taps<2&&(n=setTimeout(function(){n=null},d)),Pr(this),f.start())}}function S(){if(this.__zooming){var e,r,i,a,u=x(this,arguments),c=t.event.changedTouches,s=c.length;for(Jb(),n&&(n=clearTimeout(n)),u.taps=0,e=0;e<s;++e)i=Ft(this,c,(r=c[e]).identifier),u.touch0&&u.touch0[2]===r.identifier?u.touch0[0]=i:u.touch1&&u.touch1[2]===r.identifier&&(u.touch1[0]=i);if(r=u.that.__zoom,u.touch1){var l=u.touch0[0],h=u.touch0[1],d=u.touch1[0],p=u.touch1[1],v=(v=d[0]-l[0])*v+(v=d[1]-l[1])*v,g=(g=p[0]-h[0])*g+(g=p[1]-h[1])*g;r=y(r,Math.sqrt(v/g)),i=[(l[0]+d[0])/2,(l[1]+d[1])/2],a=[(h[0]+p[0])/2,(h[1]+p[1])/2]}else{if(!u.touch0)return;i=u.touch0[0],a=u.touch0[1]}u.zoom("touch",o(_(r,i,a),u.extent,f))}}function k(){if(this.__zooming){var n,r,i=x(this,arguments),o=t.event.changedTouches,a=o.length;for(Kb(),e&&clearTimeout(e),e=setTimeout(function(){e=null},d),n=0;n<a;++n)r=o[n],i.touch0&&i.touch0[2]===r.identifier?delete i.touch0:i.touch1&&i.touch1[2]===r.identifier&&delete i.touch1;if(i.touch1&&!i.touch0&&(i.touch0=i.touch1,delete i.touch1),i.touch0)i.touch0[1]=this.__zoom.invert(i.touch0[0]);else if(i.end(),2===i.taps){var u=Rt(this).on("dblclick.zoom");u&&u.apply(this,arguments)}}}return g.transform=function(t,n,e){var r=t.selection?t.selection():t;r.property("__zoom",em),t!==r?m(t,n,e):r.interrupt().each(function(){x(this,arguments).start().zoom(null,"function"==typeof n?n.apply(this,arguments):n).end()})},g.scaleBy=function(t,n,e){g.scaleTo(t,function(){var t=this.__zoom.k,e="function"==typeof n?n.apply(this,arguments):n;return t*e},e)},g.scaleTo=function(t,n,e){g.transform(t,function(){var t=i.apply(this,arguments),r=this.__zoom,a=null==e?b(t):"function"==typeof e?e.apply(this,arguments):e,u=r.invert(a),c="function"==typeof n?n.apply(this,arguments):n;return o(_(y(r,c),a,u),t,f)},e)},g.translateBy=function(t,n,e){g.transform(t,function(){return o(this.__zoom.translate("function"==typeof n?n.apply(this,arguments):n,"function"==typeof e?e.apply(this,arguments):e),i.apply(this,arguments),f)})},g.translateTo=function(t,n,e,r){g.transform(t,function(){var t=i.apply(this,arguments),a=this.__zoom,u=null==r?b(t):"function"==typeof r?r.apply(this,arguments):r;return o(Zb.translate(u[0],u[1]).scale(a.k).translate("function"==typeof n?-n.apply(this,arguments):-n,"function"==typeof e?-e.apply(this,arguments):-e),t,f)},r)},w.prototype={start:function(){return 1==++this.active&&(this.that.__zooming=this,this.emit("start")),this},zoom:function(t,n){return this.mouse&&"mouse"!==t&&(this.mouse[1]=n.invert(this.mouse[0])),this.touch0&&"touch"!==t&&(this.touch0[1]=n.invert(this.touch0[0])),this.touch1&&"touch"!==t&&(this.touch1[1]=n.invert(this.touch1[0])),this.that.__zoom=n,this.emit("zoom"),this},end:function(){return 0==--this.active&&(delete this.that.__zooming,this.emit("end")),this},emit:function(t){kt(new $b(g,t,this.that.__zoom),h.apply,h,[t,this.that,this.args])}},g.wheelDelta=function(t){return arguments.length?(a="function"==typeof t?t:Gb(+t),g):a},g.filter=function(t){return arguments.length?(r="function"==typeof t?t:Gb(!!t),g):r},g.touchable=function(t){return arguments.length?(u="function"==typeof t?t:Gb(!!t),g):u},g.extent=function(t){return arguments.length?(i="function"==typeof t?t:Gb([[+t[0][0],+t[0][1]],[+t[1][0],+t[1][1]]]),g):i},g.scaleExtent=function(t){return arguments.length?(c[0]=+t[0],c[1]=+t[1],g):[c[0],c[1]]},g.translateExtent=function(t){return arguments.length?(f[0][0]=+t[0][0],f[1][0]=+t[1][0],f[0][1]=+t[0][1],f[1][1]=+t[1][1],g):[[f[0][0],f[0][1]],[f[1][0],f[1][1]]]},g.constrain=function(t){return arguments.length?(o=t,g):o},g.duration=function(t){return arguments.length?(s=+t,g):s},g.interpolate=function(t){return arguments.length?(l=t,g):l},g.on=function(){var t=h.on.apply(h,arguments);return t===h?g:t},g.clickDistance=function(t){return arguments.length?(v=(t=+t)*t,g):Math.sqrt(v)},g},t.zoomIdentity=Zb,t.zoomTransform=Qb,Object.defineProperty(t,"__esModule",{value:!0})});
diff --git a/app/assets/javascripts/d3.v5.js b/app/assets/javascripts/d3.v5.js
index b11658f..632b3fa 100644
--- a/app/assets/javascripts/d3.v5.js
+++ b/app/assets/javascripts/d3.v5.js
@@ -1,11 +1,11 @@
-// https://d3js.org v5.9.2 Copyright 2019 Mike Bostock
+// https://d3js.org v5.16.0 Copyright 2020 Mike Bostock
 (function (global, factory) {
 typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
 typeof define === 'function' && define.amd ? define(['exports'], factory) :
-(factory((global.d3 = global.d3 || {})));
-}(this, (function (exports) { 'use strict';
+(global = global || self, factory(global.d3 = global.d3 || {}));
+}(this, function (exports) { 'use strict';
 
-var version = "5.9.2";
+var version = "5.16.0";
 
 function ascending(a, b) {
   return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
@@ -737,7 +737,7 @@ var noop = {value: function() {}};
 
 function dispatch() {
   for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {
-    if (!(t = arguments[i] + "") || (t in _)) throw new Error("illegal type: " + t);
+    if (!(t = arguments[i] + "") || (t in _) || /[\s.]/.test(t)) throw new Error("illegal type: " + t);
     _[t] = [];
   }
   return new Dispatch(_);
@@ -1080,9 +1080,9 @@ function selection_join(onenter, onupdate, onexit) {
   return enter && update ? enter.merge(update).order() : update;
 }
 
-function selection_merge(selection$$1) {
+function selection_merge(selection) {
 
-  for (var groups0 = this._groups, groups1 = selection$$1._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
+  for (var groups0 = this._groups, groups1 = selection._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
     for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
       if (node = group0[i] || group1[i]) {
         merge[i] = node;
@@ -1478,11 +1478,13 @@ function selection_remove() {
 }
 
 function selection_cloneShallow() {
-  return this.parentNode.insertBefore(this.cloneNode(false), this.nextSibling);
+  var clone = this.cloneNode(false), parent = this.parentNode;
+  return parent ? parent.insertBefore(clone, this.nextSibling) : clone;
 }
 
 function selection_cloneDeep() {
-  return this.parentNode.insertBefore(this.cloneNode(true), this.nextSibling);
+  var clone = this.cloneNode(true), parent = this.parentNode;
+  return parent ? parent.insertBefore(clone, this.nextSibling) : clone;
 }
 
 function selection_clone(deep) {
@@ -1785,9 +1787,9 @@ function noevent() {
 
 function dragDisable(view) {
   var root = view.document.documentElement,
-      selection$$1 = select(view).on("dragstart.drag", noevent, true);
+      selection = select(view).on("dragstart.drag", noevent, true);
   if ("onselectstart" in root) {
-    selection$$1.on("selectstart.drag", noevent, true);
+    selection.on("selectstart.drag", noevent, true);
   } else {
     root.__noselect = root.style.MozUserSelect;
     root.style.MozUserSelect = "none";
@@ -1796,13 +1798,13 @@ function dragDisable(view) {
 
 function yesdrag(view, noclick) {
   var root = view.document.documentElement,
-      selection$$1 = select(view).on("dragstart.drag", null);
+      selection = select(view).on("dragstart.drag", null);
   if (noclick) {
-    selection$$1.on("click.drag", noevent, true);
-    setTimeout(function() { selection$$1.on("click.drag", null); }, 0);
+    selection.on("click.drag", noevent, true);
+    setTimeout(function() { selection.on("click.drag", null); }, 0);
   }
   if ("onselectstart" in root) {
-    selection$$1.on("selectstart.drag", null);
+    selection.on("selectstart.drag", null);
   } else {
     root.style.MozUserSelect = root.__noselect;
     delete root.__noselect;
@@ -1835,7 +1837,7 @@ DragEvent.prototype.on = function() {
 
 // Ignore right-click, since that should open the context menu.
 function defaultFilter() {
-  return !exports.event.button;
+  return !exports.event.ctrlKey && !exports.event.button;
 }
 
 function defaultContainer() {
@@ -1847,7 +1849,7 @@ function defaultSubject(d) {
 }
 
 function defaultTouchable() {
-  return "ontouchstart" in this;
+  return navigator.maxTouchPoints || ("ontouchstart" in this);
 }
 
 function drag() {
@@ -1864,8 +1866,8 @@ function drag() {
       touchending,
       clickDistance2 = 0;
 
-  function drag(selection$$1) {
-    selection$$1
+  function drag(selection) {
+    selection
         .on("mousedown.drag", mousedowned)
       .filter(touchable)
         .on("touchstart.drag", touchstarted)
@@ -1906,12 +1908,12 @@ function drag() {
 
   function touchstarted() {
     if (!filter.apply(this, arguments)) return;
-    var touches$$1 = exports.event.changedTouches,
+    var touches = exports.event.changedTouches,
         c = container.apply(this, arguments),
-        n = touches$$1.length, i, gesture;
+        n = touches.length, i, gesture;
 
     for (i = 0; i < n; ++i) {
-      if (gesture = beforestart(touches$$1[i].identifier, c, touch, this, arguments)) {
+      if (gesture = beforestart(touches[i].identifier, c, touch, this, arguments)) {
         nopropagation();
         gesture("start");
       }
@@ -1919,11 +1921,11 @@ function drag() {
   }
 
   function touchmoved() {
-    var touches$$1 = exports.event.changedTouches,
-        n = touches$$1.length, i, gesture;
+    var touches = exports.event.changedTouches,
+        n = touches.length, i, gesture;
 
     for (i = 0; i < n; ++i) {
-      if (gesture = gestures[touches$$1[i].identifier]) {
+      if (gesture = gestures[touches[i].identifier]) {
         noevent();
         gesture("drag");
       }
@@ -1931,21 +1933,21 @@ function drag() {
   }
 
   function touchended() {
-    var touches$$1 = exports.event.changedTouches,
-        n = touches$$1.length, i, gesture;
+    var touches = exports.event.changedTouches,
+        n = touches.length, i, gesture;
 
     if (touchending) clearTimeout(touchending);
     touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed!
     for (i = 0; i < n; ++i) {
-      if (gesture = gestures[touches$$1[i].identifier]) {
+      if (gesture = gestures[touches[i].identifier]) {
         nopropagation();
         gesture("end");
       }
     }
   }
 
-  function beforestart(id, container, point$$1, that, args) {
-    var p = point$$1(container, id), s, dx, dy,
+  function beforestart(id, container, point, that, args) {
+    var p = point(container, id), s, dx, dy,
         sublisteners = listeners.copy();
 
     if (!customEvent(new DragEvent(drag, "beforestart", s, id, active, p[0], p[1], 0, 0, sublisteners), function() {
@@ -1960,7 +1962,7 @@ function drag() {
       switch (type) {
         case "start": gestures[id] = gesture, n = active++; break;
         case "end": delete gestures[id], --active; // nobreak
-        case "drag": p = point$$1(container, id), n = active; break;
+        case "drag": p = point(container, id), n = active; break;
       }
       customEvent(new DragEvent(drag, type, s, id, n, p[0] + dx, p[1] + dy, p[0] - p0[0], p[1] - p0[1], sublisteners), sublisteners.apply, sublisteners, [type, that, args]);
     };
@@ -2013,8 +2015,7 @@ var brighter = 1 / darker;
 var reI = "\\s*([+-]?\\d+)\\s*",
     reN = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)\\s*",
     reP = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)%\\s*",
-    reHex3 = /^#([0-9a-f]{3})$/,
-    reHex6 = /^#([0-9a-f]{6})$/,
+    reHex = /^#([0-9a-f]{3,8})$/,
     reRgbInteger = new RegExp("^rgb\\(" + [reI, reI, reI] + "\\)$"),
     reRgbPercent = new RegExp("^rgb\\(" + [reP, reP, reP] + "\\)$"),
     reRgbaInteger = new RegExp("^rgba\\(" + [reI, reI, reI, reN] + "\\)$"),
@@ -2174,29 +2175,46 @@ var named = {
 };
 
 define(Color, color, {
+  copy: function(channels) {
+    return Object.assign(new this.constructor, this, channels);
+  },
   displayable: function() {
     return this.rgb().displayable();
   },
-  hex: function() {
-    return this.rgb().hex();
-  },
-  toString: function() {
-    return this.rgb() + "";
-  }
+  hex: color_formatHex, // Deprecated! Use color.formatHex.
+  formatHex: color_formatHex,
+  formatHsl: color_formatHsl,
+  formatRgb: color_formatRgb,
+  toString: color_formatRgb
 });
 
+function color_formatHex() {
+  return this.rgb().formatHex();
+}
+
+function color_formatHsl() {
+  return hslConvert(this).formatHsl();
+}
+
+function color_formatRgb() {
+  return this.rgb().formatRgb();
+}
+
 function color(format) {
-  var m;
+  var m, l;
   format = (format + "").trim().toLowerCase();
-  return (m = reHex3.exec(format)) ? (m = parseInt(m[1], 16), new Rgb((m >> 8 & 0xf) | (m >> 4 & 0x0f0), (m >> 4 & 0xf) | (m & 0xf0), ((m & 0xf) << 4) | (m & 0xf), 1)) // #f00
-      : (m = reHex6.exec(format)) ? rgbn(parseInt(m[1], 16)) // #ff0000
+  return (m = reHex.exec(format)) ? (l = m[1].length, m = parseInt(m[1], 16), l === 6 ? rgbn(m) // #ff0000
+      : l === 3 ? new Rgb((m >> 8 & 0xf) | (m >> 4 & 0xf0), (m >> 4 & 0xf) | (m & 0xf0), ((m & 0xf) << 4) | (m & 0xf), 1) // #f00
+      : l === 8 ? rgba(m >> 24 & 0xff, m >> 16 & 0xff, m >> 8 & 0xff, (m & 0xff) / 0xff) // #ff000000
+      : l === 4 ? rgba((m >> 12 & 0xf) | (m >> 8 & 0xf0), (m >> 8 & 0xf) | (m >> 4 & 0xf0), (m >> 4 & 0xf) | (m & 0xf0), (((m & 0xf) << 4) | (m & 0xf)) / 0xff) // #f000
+      : null) // invalid hex
       : (m = reRgbInteger.exec(format)) ? new Rgb(m[1], m[2], m[3], 1) // rgb(255, 0, 0)
       : (m = reRgbPercent.exec(format)) ? new Rgb(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, 1) // rgb(100%, 0%, 0%)
       : (m = reRgbaInteger.exec(format)) ? rgba(m[1], m[2], m[3], m[4]) // rgba(255, 0, 0, 1)
       : (m = reRgbaPercent.exec(format)) ? rgba(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, m[4]) // rgb(100%, 0%, 0%, 1)
       : (m = reHslPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, 1) // hsl(120, 50%, 50%)
       : (m = reHslaPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, m[4]) // hsla(120, 50%, 50%, 1)
-      : named.hasOwnProperty(format) ? rgbn(named[format])
+      : named.hasOwnProperty(format) ? rgbn(named[format]) // eslint-disable-line no-prototype-builtins
       : format === "transparent" ? new Rgb(NaN, NaN, NaN, 0)
       : null;
 }
@@ -2241,24 +2259,30 @@ define(Rgb, rgb, extend(Color, {
     return this;
   },
   displayable: function() {
-    return (0 <= this.r && this.r <= 255)
-        && (0 <= this.g && this.g <= 255)
-        && (0 <= this.b && this.b <= 255)
+    return (-0.5 <= this.r && this.r < 255.5)
+        && (-0.5 <= this.g && this.g < 255.5)
+        && (-0.5 <= this.b && this.b < 255.5)
         && (0 <= this.opacity && this.opacity <= 1);
   },
-  hex: function() {
-    return "#" + hex(this.r) + hex(this.g) + hex(this.b);
-  },
-  toString: function() {
-    var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
-    return (a === 1 ? "rgb(" : "rgba(")
-        + Math.max(0, Math.min(255, Math.round(this.r) || 0)) + ", "
-        + Math.max(0, Math.min(255, Math.round(this.g) || 0)) + ", "
-        + Math.max(0, Math.min(255, Math.round(this.b) || 0))
-        + (a === 1 ? ")" : ", " + a + ")");
-  }
+  hex: rgb_formatHex, // Deprecated! Use color.formatHex.
+  formatHex: rgb_formatHex,
+  formatRgb: rgb_formatRgb,
+  toString: rgb_formatRgb
 }));
 
+function rgb_formatHex() {
+  return "#" + hex(this.r) + hex(this.g) + hex(this.b);
+}
+
+function rgb_formatRgb() {
+  var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
+  return (a === 1 ? "rgb(" : "rgba(")
+      + Math.max(0, Math.min(255, Math.round(this.r) || 0)) + ", "
+      + Math.max(0, Math.min(255, Math.round(this.g) || 0)) + ", "
+      + Math.max(0, Math.min(255, Math.round(this.b) || 0))
+      + (a === 1 ? ")" : ", " + a + ")");
+}
+
 function hex(value) {
   value = Math.max(0, Math.min(255, Math.round(value) || 0));
   return (value < 16 ? "0" : "") + value.toString(16);
@@ -2334,6 +2358,14 @@ define(Hsl, hsl, extend(Color, {
     return (0 <= this.s && this.s <= 1 || isNaN(this.s))
         && (0 <= this.l && this.l <= 1)
         && (0 <= this.opacity && this.opacity <= 1);
+  },
+  formatHsl: function() {
+    var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
+    return (a === 1 ? "hsl(" : "hsla(")
+        + (this.h || 0) + ", "
+        + (this.s || 0) * 100 + "%, "
+        + (this.l || 0) * 100 + "%"
+        + (a === 1 ? ")" : ", " + a + ")");
   }
 }));
 
@@ -2348,7 +2380,7 @@ function hsl2rgb(h, m1, m2) {
 var deg2rad = Math.PI / 180;
 var rad2deg = 180 / Math.PI;
 
-// https://beta.observablehq.com/@mbostock/lab-and-rgb
+// https://observablehq.com/@mbostock/lab-and-rgb
 var K = 18,
     Xn = 0.96422,
     Yn = 1,
@@ -2360,11 +2392,7 @@ var K = 18,
 
 function labConvert(o) {
   if (o instanceof Lab) return new Lab(o.l, o.a, o.b, o.opacity);
-  if (o instanceof Hcl) {
-    if (isNaN(o.h)) return new Lab(o.l, 0, 0, o.opacity);
-    var h = o.h * deg2rad;
-    return new Lab(o.l, Math.cos(h) * o.c, Math.sin(h) * o.c, o.opacity);
-  }
+  if (o instanceof Hcl) return hcl2lab(o);
   if (!(o instanceof Rgb)) o = rgbConvert(o);
   var r = rgb2lrgb(o.r),
       g = rgb2lrgb(o.g),
@@ -2434,7 +2462,7 @@ function rgb2lrgb(x) {
 function hclConvert(o) {
   if (o instanceof Hcl) return new Hcl(o.h, o.c, o.l, o.opacity);
   if (!(o instanceof Lab)) o = labConvert(o);
-  if (o.a === 0 && o.b === 0) return new Hcl(NaN, 0, o.l, o.opacity);
+  if (o.a === 0 && o.b === 0) return new Hcl(NaN, 0 < o.l && o.l < 100 ? 0 : NaN, o.l, o.opacity);
   var h = Math.atan2(o.b, o.a) * rad2deg;
   return new Hcl(h < 0 ? h + 360 : h, Math.sqrt(o.a * o.a + o.b * o.b), o.l, o.opacity);
 }
@@ -2454,6 +2482,12 @@ function Hcl(h, c, l, opacity) {
   this.opacity = +opacity;
 }
 
+function hcl2lab(o) {
+  if (isNaN(o.h)) return new Lab(o.l, 0, 0, o.opacity);
+  var h = o.h * deg2rad;
+  return new Lab(o.l, Math.cos(h) * o.c, Math.sin(h) * o.c, o.opacity);
+}
+
 define(Hcl, hcl, extend(Color, {
   brighter: function(k) {
     return new Hcl(this.h, this.c, this.l + K * (k == null ? 1 : k), this.opacity);
@@ -2462,7 +2496,7 @@ define(Hcl, hcl, extend(Color, {
     return new Hcl(this.h, this.c, this.l - K * (k == null ? 1 : k), this.opacity);
   },
   rgb: function() {
-    return labConvert(this).rgb();
+    return hcl2lab(this).rgb();
   }
 }));
 
@@ -2591,12 +2625,12 @@ function nogamma(a, b) {
 }
 
 var interpolateRgb = (function rgbGamma(y) {
-  var color$$1 = gamma(y);
+  var color = gamma(y);
 
-  function rgb$$1(start, end) {
-    var r = color$$1((start = rgb(start)).r, (end = rgb(end)).r),
-        g = color$$1(start.g, end.g),
-        b = color$$1(start.b, end.b),
+  function rgb$1(start, end) {
+    var r = color((start = rgb(start)).r, (end = rgb(end)).r),
+        g = color(start.g, end.g),
+        b = color(start.b, end.b),
         opacity = nogamma(start.opacity, end.opacity);
     return function(t) {
       start.r = r(t);
@@ -2607,9 +2641,9 @@ var interpolateRgb = (function rgbGamma(y) {
     };
   }
 
-  rgb$$1.gamma = rgbGamma;
+  rgb$1.gamma = rgbGamma;
 
-  return rgb$$1;
+  return rgb$1;
 })(1);
 
 function rgbSpline(spline) {
@@ -2618,22 +2652,22 @@ function rgbSpline(spline) {
         r = new Array(n),
         g = new Array(n),
         b = new Array(n),
-        i, color$$1;
+        i, color;
     for (i = 0; i < n; ++i) {
-      color$$1 = rgb(colors[i]);
-      r[i] = color$$1.r || 0;
-      g[i] = color$$1.g || 0;
-      b[i] = color$$1.b || 0;
+      color = rgb(colors[i]);
+      r[i] = color.r || 0;
+      g[i] = color.g || 0;
+      b[i] = color.b || 0;
     }
     r = spline(r);
     g = spline(g);
     b = spline(b);
-    color$$1.opacity = 1;
+    color.opacity = 1;
     return function(t) {
-      color$$1.r = r(t);
-      color$$1.g = g(t);
-      color$$1.b = b(t);
-      return color$$1 + "";
+      color.r = r(t);
+      color.g = g(t);
+      color.b = b(t);
+      return color + "";
     };
   };
 }
@@ -2641,7 +2675,26 @@ function rgbSpline(spline) {
 var rgbBasis = rgbSpline(basis$1);
 var rgbBasisClosed = rgbSpline(basisClosed);
 
+function numberArray(a, b) {
+  if (!b) b = [];
+  var n = a ? Math.min(b.length, a.length) : 0,
+      c = b.slice(),
+      i;
+  return function(t) {
+    for (i = 0; i < n; ++i) c[i] = a[i] * (1 - t) + b[i] * t;
+    return c;
+  };
+}
+
+function isNumberArray(x) {
+  return ArrayBuffer.isView(x) && !(x instanceof DataView);
+}
+
 function array$1(a, b) {
+  return (isNumberArray(b) ? numberArray : genericArray)(a, b);
+}
+
+function genericArray(a, b) {
   var nb = b ? b.length : 0,
       na = a ? Math.min(nb, a.length) : 0,
       x = new Array(na),
@@ -2659,14 +2712,14 @@ function array$1(a, b) {
 
 function date(a, b) {
   var d = new Date;
-  return a = +a, b -= a, function(t) {
-    return d.setTime(a + b * t), d;
+  return a = +a, b = +b, function(t) {
+    return d.setTime(a * (1 - t) + b * t), d;
   };
 }
 
 function interpolateNumber(a, b) {
-  return a = +a, b -= a, function(t) {
-    return a + b * t;
+  return a = +a, b = +b, function(t) {
+    return a * (1 - t) + b * t;
   };
 }
 
@@ -2762,7 +2815,8 @@ function interpolateValue(a, b) {
       : t === "string" ? ((c = color(b)) ? (b = c, interpolateRgb) : interpolateString)
       : b instanceof color ? interpolateRgb
       : b instanceof Date ? date
-      : Array.isArray(b) ? array$1
+      : isNumberArray(b) ? numberArray
+      : Array.isArray(b) ? genericArray
       : typeof b.valueOf !== "function" && typeof b.toString !== "function" || isNaN(b) ? object
       : interpolateNumber)(a, b);
 }
@@ -2783,8 +2837,8 @@ function hue$1(a, b) {
 }
 
 function interpolateRound(a, b) {
-  return a = +a, b -= a, function(t) {
-    return Math.round(a + b * t);
+  return a = +a, b = +b, function(t) {
+    return Math.round(a * (1 - t) + b * t);
   };
 }
 
@@ -2965,9 +3019,9 @@ function interpolateZoom(p0, p1) {
   return i;
 }
 
-function hsl$1(hue$$1) {
+function hsl$1(hue) {
   return function(start, end) {
-    var h = hue$$1((start = hsl(start)).h, (end = hsl(end)).h),
+    var h = hue((start = hsl(start)).h, (end = hsl(end)).h),
         s = nogamma(start.s, end.s),
         l = nogamma(start.l, end.l),
         opacity = nogamma(start.opacity, end.opacity);
@@ -2998,9 +3052,9 @@ function lab$1(start, end) {
   };
 }
 
-function hcl$1(hue$$1) {
+function hcl$1(hue) {
   return function(start, end) {
-    var h = hue$$1((start = hcl(start)).h, (end = hcl(end)).h),
+    var h = hue((start = hcl(start)).h, (end = hcl(end)).h),
         c = nogamma(start.c, end.c),
         l = nogamma(start.l, end.l),
         opacity = nogamma(start.opacity, end.opacity);
@@ -3017,12 +3071,12 @@ function hcl$1(hue$$1) {
 var hcl$2 = hcl$1(hue);
 var hclLong = hcl$1(nogamma);
 
-function cubehelix$1(hue$$1) {
+function cubehelix$1(hue) {
   return (function cubehelixGamma(y) {
     y = +y;
 
-    function cubehelix$$1(start, end) {
-      var h = hue$$1((start = cubehelix(start)).h, (end = cubehelix(end)).h),
+    function cubehelix$1(start, end) {
+      var h = hue((start = cubehelix(start)).h, (end = cubehelix(end)).h),
           s = nogamma(start.s, end.s),
           l = nogamma(start.l, end.l),
           opacity = nogamma(start.opacity, end.opacity);
@@ -3035,9 +3089,9 @@ function cubehelix$1(hue$$1) {
       };
     }
 
-    cubehelix$$1.gamma = cubehelixGamma;
+    cubehelix$1.gamma = cubehelixGamma;
 
-    return cubehelix$$1;
+    return cubehelix$1;
   })(1);
 }
 
@@ -3345,7 +3399,7 @@ function create$1(node, id, self) {
 
 function interrupt(node, name) {
   var schedules = node.__transition,
-      schedule$$1,
+      schedule,
       active,
       empty = true,
       i;
@@ -3355,11 +3409,11 @@ function interrupt(node, name) {
   name = name == null ? null : name + "";
 
   for (i in schedules) {
-    if ((schedule$$1 = schedules[i]).name !== name) { empty = false; continue; }
-    active = schedule$$1.state > STARTING && schedule$$1.state < ENDING;
-    schedule$$1.state = ENDED;
-    schedule$$1.timer.stop();
-    schedule$$1.on.call(active ? "interrupt" : "cancel", node, node.__data__, schedule$$1.index, schedule$$1.group);
+    if ((schedule = schedules[i]).name !== name) { empty = false; continue; }
+    active = schedule.state > STARTING && schedule.state < ENDING;
+    schedule.state = ENDED;
+    schedule.timer.stop();
+    schedule.on.call(active ? "interrupt" : "cancel", node, node.__data__, schedule.index, schedule.group);
     delete schedules[i];
   }
 
@@ -3375,8 +3429,8 @@ function selection_interrupt(name) {
 function tweenRemove(id, name) {
   var tween0, tween1;
   return function() {
-    var schedule$$1 = set$1(this, id),
-        tween = schedule$$1.tween;
+    var schedule = set$1(this, id),
+        tween = schedule.tween;
 
     // If this node shared tween with the previous node,
     // just assign the updated shared tween and we’re done!
@@ -3392,7 +3446,7 @@ function tweenRemove(id, name) {
       }
     }
 
-    schedule$$1.tween = tween1;
+    schedule.tween = tween1;
   };
 }
 
@@ -3400,8 +3454,8 @@ function tweenFunction(id, name, value) {
   var tween0, tween1;
   if (typeof value !== "function") throw new Error;
   return function() {
-    var schedule$$1 = set$1(this, id),
-        tween = schedule$$1.tween;
+    var schedule = set$1(this, id),
+        tween = schedule.tween;
 
     // If this node shared tween with the previous node,
     // just assign the updated shared tween and we’re done!
@@ -3417,7 +3471,7 @@ function tweenFunction(id, name, value) {
       if (i === n) tween1.push(t);
     }
 
-    schedule$$1.tween = tween1;
+    schedule.tween = tween1;
   };
 }
 
@@ -3443,8 +3497,8 @@ function tweenValue(transition, name, value) {
   var id = transition._id;
 
   transition.each(function() {
-    var schedule$$1 = set$1(this, id);
-    (schedule$$1.value || (schedule$$1.value = {}))[name] = value.apply(this, arguments);
+    var schedule = set$1(this, id);
+    (schedule.value || (schedule.value = {}))[name] = value.apply(this, arguments);
   });
 
   return function(node) {
@@ -3472,7 +3526,7 @@ function attrRemoveNS$1(fullname) {
   };
 }
 
-function attrConstant$1(name, interpolate$$1, value1) {
+function attrConstant$1(name, interpolate, value1) {
   var string00,
       string1 = value1 + "",
       interpolate0;
@@ -3480,11 +3534,11 @@ function attrConstant$1(name, interpolate$$1, value1) {
     var string0 = this.getAttribute(name);
     return string0 === string1 ? null
         : string0 === string00 ? interpolate0
-        : interpolate0 = interpolate$$1(string00 = string0, value1);
+        : interpolate0 = interpolate(string00 = string0, value1);
   };
 }
 
-function attrConstantNS$1(fullname, interpolate$$1, value1) {
+function attrConstantNS$1(fullname, interpolate, value1) {
   var string00,
       string1 = value1 + "",
       interpolate0;
@@ -3492,11 +3546,11 @@ function attrConstantNS$1(fullname, interpolate$$1, value1) {
     var string0 = this.getAttributeNS(fullname.space, fullname.local);
     return string0 === string1 ? null
         : string0 === string00 ? interpolate0
-        : interpolate0 = interpolate$$1(string00 = string0, value1);
+        : interpolate0 = interpolate(string00 = string0, value1);
   };
 }
 
-function attrFunction$1(name, interpolate$$1, value) {
+function attrFunction$1(name, interpolate, value) {
   var string00,
       string10,
       interpolate0;
@@ -3507,11 +3561,11 @@ function attrFunction$1(name, interpolate$$1, value) {
     string1 = value1 + "";
     return string0 === string1 ? null
         : string0 === string00 && string1 === string10 ? interpolate0
-        : (string10 = string1, interpolate0 = interpolate$$1(string00 = string0, value1));
+        : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
   };
 }
 
-function attrFunctionNS$1(fullname, interpolate$$1, value) {
+function attrFunctionNS$1(fullname, interpolate, value) {
   var string00,
       string10,
       interpolate0;
@@ -3522,7 +3576,7 @@ function attrFunctionNS$1(fullname, interpolate$$1, value) {
     string1 = value1 + "";
     return string0 === string1 ? null
         : string0 === string00 && string1 === string10 ? interpolate0
-        : (string10 = string1, interpolate0 = interpolate$$1(string00 = string0, value1));
+        : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
   };
 }
 
@@ -3536,13 +3590,13 @@ function transition_attr(name, value) {
 
 function attrInterpolate(name, i) {
   return function(t) {
-    this.setAttribute(name, i(t));
+    this.setAttribute(name, i.call(this, t));
   };
 }
 
 function attrInterpolateNS(fullname, i) {
   return function(t) {
-    this.setAttributeNS(fullname.space, fullname.local, i(t));
+    this.setAttributeNS(fullname.space, fullname.local, i.call(this, t));
   };
 }
 
@@ -3650,10 +3704,10 @@ function transition_filter(match) {
   return new Transition(subgroups, this._parents, this._name, this._id);
 }
 
-function transition_merge(transition$$1) {
-  if (transition$$1._id !== this._id) throw new Error;
+function transition_merge(transition) {
+  if (transition._id !== this._id) throw new Error;
 
-  for (var groups0 = this._groups, groups1 = transition$$1._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
+  for (var groups0 = this._groups, groups1 = transition._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
     for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
       if (node = group0[i] || group1[i]) {
         merge[i] = node;
@@ -3679,15 +3733,15 @@ function start(name) {
 function onFunction(id, name, listener) {
   var on0, on1, sit = start(name) ? init : set$1;
   return function() {
-    var schedule$$1 = sit(this, id),
-        on = schedule$$1.on;
+    var schedule = sit(this, id),
+        on = schedule.on;
 
     // If this node shared a dispatch with the previous node,
     // just assign the updated shared dispatch and we’re done!
     // Otherwise, copy-on-write.
     if (on !== on0) (on1 = (on0 = on).copy()).on(name, listener);
 
-    schedule$$1.on = on1;
+    schedule.on = on1;
   };
 }
 
@@ -3711,15 +3765,15 @@ function transition_remove() {
   return this.on("end.remove", removeFunction(this._id));
 }
 
-function transition_select(select$$1) {
+function transition_select(select) {
   var name = this._name,
       id = this._id;
 
-  if (typeof select$$1 !== "function") select$$1 = selector(select$$1);
+  if (typeof select !== "function") select = selector(select);
 
   for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
     for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
-      if ((node = group[i]) && (subnode = select$$1.call(node, node.__data__, i, group))) {
+      if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
         if ("__data__" in node) subnode.__data__ = node.__data__;
         subgroup[i] = subnode;
         schedule(subgroup[i], name, id, i, subgroup, get$1(node, id));
@@ -3730,16 +3784,16 @@ function transition_select(select$$1) {
   return new Transition(subgroups, this._parents, name, id);
 }
 
-function transition_selectAll(select$$1) {
+function transition_selectAll(select) {
   var name = this._name,
       id = this._id;
 
-  if (typeof select$$1 !== "function") select$$1 = selectorAll(select$$1);
+  if (typeof select !== "function") select = selectorAll(select);
 
   for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
     for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
       if (node = group[i]) {
-        for (var children = select$$1.call(node, node.__data__, i, group), child, inherit = get$1(node, id), k = 0, l = children.length; k < l; ++k) {
+        for (var children = select.call(node, node.__data__, i, group), child, inherit = get$1(node, id), k = 0, l = children.length; k < l; ++k) {
           if (child = children[k]) {
             schedule(child, name, id, k, children, inherit);
           }
@@ -3759,7 +3813,7 @@ function transition_selection() {
   return new Selection$1(this._groups, this._parents);
 }
 
-function styleNull(name, interpolate$$1) {
+function styleNull(name, interpolate) {
   var string00,
       string10,
       interpolate0;
@@ -3768,7 +3822,7 @@ function styleNull(name, interpolate$$1) {
         string1 = (this.style.removeProperty(name), styleValue(this, name));
     return string0 === string1 ? null
         : string0 === string00 && string1 === string10 ? interpolate0
-        : interpolate0 = interpolate$$1(string00 = string0, string10 = string1);
+        : interpolate0 = interpolate(string00 = string0, string10 = string1);
   };
 }
 
@@ -3778,7 +3832,7 @@ function styleRemove$1(name) {
   };
 }
 
-function styleConstant$1(name, interpolate$$1, value1) {
+function styleConstant$1(name, interpolate, value1) {
   var string00,
       string1 = value1 + "",
       interpolate0;
@@ -3786,11 +3840,11 @@ function styleConstant$1(name, interpolate$$1, value1) {
     var string0 = styleValue(this, name);
     return string0 === string1 ? null
         : string0 === string00 ? interpolate0
-        : interpolate0 = interpolate$$1(string00 = string0, value1);
+        : interpolate0 = interpolate(string00 = string0, value1);
   };
 }
 
-function styleFunction$1(name, interpolate$$1, value) {
+function styleFunction$1(name, interpolate, value) {
   var string00,
       string10,
       interpolate0;
@@ -3801,23 +3855,23 @@ function styleFunction$1(name, interpolate$$1, value) {
     if (value1 == null) string1 = value1 = (this.style.removeProperty(name), styleValue(this, name));
     return string0 === string1 ? null
         : string0 === string00 && string1 === string10 ? interpolate0
-        : (string10 = string1, interpolate0 = interpolate$$1(string00 = string0, value1));
+        : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
   };
 }
 
 function styleMaybeRemove(id, name) {
   var on0, on1, listener0, key = "style." + name, event = "end." + key, remove;
   return function() {
-    var schedule$$1 = set$1(this, id),
-        on = schedule$$1.on,
-        listener = schedule$$1.value[key] == null ? remove || (remove = styleRemove$1(name)) : undefined;
+    var schedule = set$1(this, id),
+        on = schedule.on,
+        listener = schedule.value[key] == null ? remove || (remove = styleRemove$1(name)) : undefined;
 
     // If this node shared a dispatch with the previous node,
     // just assign the updated shared dispatch and we’re done!
     // Otherwise, copy-on-write.
     if (on !== on0 || listener0 !== listener) (on1 = (on0 = on).copy()).on(event, listener0 = listener);
 
-    schedule$$1.on = on1;
+    schedule.on = on1;
   };
 }
 
@@ -3836,7 +3890,7 @@ function transition_style(name, value, priority) {
 
 function styleInterpolate(name, i, priority) {
   return function(t) {
-    this.style.setProperty(name, i(t), priority);
+    this.style.setProperty(name, i.call(this, t), priority);
   };
 }
 
@@ -3878,6 +3932,31 @@ function transition_text(value) {
       : textConstant$1(value == null ? "" : value + ""));
 }
 
+function textInterpolate(i) {
+  return function(t) {
+    this.textContent = i.call(this, t);
+  };
+}
+
+function textTween(value) {
+  var t0, i0;
+  function tween() {
+    var i = value.apply(this, arguments);
+    if (i !== i0) t0 = (i0 = i) && textInterpolate(i);
+    return t0;
+  }
+  tween._value = value;
+  return tween;
+}
+
+function transition_textTween(value) {
+  var key = "text";
+  if (arguments.length < 1) return (key = this.tween(key)) && key._value;
+  if (value == null) return this.tween(key, null);
+  if (typeof value !== "function") throw new Error;
+  return this.tween(key, textTween(value));
+}
+
 function transition_transition() {
   var name = this._name,
       id0 = this._id,
@@ -3907,8 +3986,8 @@ function transition_end() {
         end = {value: function() { if (--size === 0) resolve(); }};
 
     that.each(function() {
-      var schedule$$1 = set$1(this, id),
-          on = schedule$$1.on;
+      var schedule = set$1(this, id),
+          on = schedule.on;
 
       // If this node shared a dispatch with the previous node,
       // just assign the updated shared dispatch and we’re done!
@@ -3920,7 +3999,7 @@ function transition_end() {
         on1._.end.push(end);
       }
 
-      schedule$$1.on = on1;
+      schedule.on = on1;
     });
   });
 }
@@ -3964,6 +4043,7 @@ Transition.prototype = transition.prototype = {
   style: transition_style,
   styleTween: transition_styleTween,
   text: transition_text,
+  textTween: transition_textTween,
   remove: transition_remove,
   tween: transition_tween,
   delay: transition_delay,
@@ -4228,13 +4308,13 @@ var root$1 = [null];
 
 function active(node, name) {
   var schedules = node.__transition,
-      schedule$$1,
+      schedule,
       i;
 
   if (schedules) {
     name = name == null ? null : name + "";
     for (i in schedules) {
-      if ((schedule$$1 = schedules[i]).state > SCHEDULED && schedule$$1.name === name) {
+      if ((schedule = schedules[i]).state > SCHEDULED && schedule.name === name) {
         return new Transition([[node]], root$1, name, +i);
       }
     }
@@ -4269,24 +4349,38 @@ var MODE_DRAG = {name: "drag"},
     MODE_HANDLE = {name: "handle"},
     MODE_CENTER = {name: "center"};
 
+function number1(e) {
+  return [+e[0], +e[1]];
+}
+
+function number2(e) {
+  return [number1(e[0]), number1(e[1])];
+}
+
+function toucher(identifier) {
+  return function(target) {
+    return touch(target, exports.event.touches, identifier);
+  };
+}
+
 var X = {
   name: "x",
-  handles: ["e", "w"].map(type),
-  input: function(x, e) { return x && [[x[0], e[0][1]], [x[1], e[1][1]]]; },
+  handles: ["w", "e"].map(type),
+  input: function(x, e) { return x == null ? null : [[+x[0], e[0][1]], [+x[1], e[1][1]]]; },
   output: function(xy) { return xy && [xy[0][0], xy[1][0]]; }
 };
 
 var Y = {
   name: "y",
   handles: ["n", "s"].map(type),
-  input: function(y, e) { return y && [[e[0][0], y[0]], [e[1][0], y[1]]]; },
+  input: function(y, e) { return y == null ? null : [[e[0][0], +y[0]], [e[1][0], +y[1]]]; },
   output: function(xy) { return xy && [xy[0][1], xy[1][1]]; }
 };
 
 var XY = {
   name: "xy",
-  handles: ["n", "e", "s", "w", "nw", "ne", "se", "sw"].map(type),
-  input: function(xy) { return xy; },
+  handles: ["n", "w", "e", "s", "nw", "ne", "sw", "se"].map(type),
+  input: function(xy) { return xy == null ? null : number2(xy); },
   output: function(xy) { return xy; }
 };
 
@@ -4353,14 +4447,22 @@ function type(t) {
 
 // Ignore right-click, since that should open the context menu.
 function defaultFilter$1() {
-  return !exports.event.button;
+  return !exports.event.ctrlKey && !exports.event.button;
 }
 
 function defaultExtent() {
   var svg = this.ownerSVGElement || this;
+  if (svg.hasAttribute("viewBox")) {
+    svg = svg.viewBox.baseVal;
+    return [[svg.x, svg.y], [svg.x + svg.width, svg.y + svg.height]];
+  }
   return [[0, 0], [svg.width.baseVal.value, svg.height.baseVal.value]];
 }
 
+function defaultTouchable$1() {
+  return navigator.maxTouchPoints || ("ontouchstart" in this);
+}
+
 // Like d3.local, but with the name “__brush” rather than auto-generated.
 function local$1(node) {
   while (!node.__brush) if (!(node = node.parentNode)) return;
@@ -4392,7 +4494,9 @@ function brush() {
 function brush$1(dim) {
   var extent = defaultExtent,
       filter = defaultFilter$1,
-      listeners = dispatch(brush, "start", "brush", "end"),
+      touchable = defaultTouchable$1,
+      keys = true,
+      listeners = dispatch("start", "brush", "end"),
       handleSize = 6,
       touchending;
 
@@ -4439,11 +4543,16 @@ function brush$1(dim) {
         .each(redraw)
         .attr("fill", "none")
         .attr("pointer-events", "all")
-        .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)")
-        .on("mousedown.brush touchstart.brush", started);
+        .on("mousedown.brush", started)
+      .filter(touchable)
+        .on("touchstart.brush", started)
+        .on("touchmove.brush", touchmoved)
+        .on("touchend.brush touchcancel.brush", touchended)
+        .style("touch-action", "none")
+        .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
   }
 
-  brush.move = function(group, selection$$1) {
+  brush.move = function(group, selection) {
     if (group.selection) {
       group
           .on("start.brush", function() { emitter(this, arguments).beforestart().start(); })
@@ -4453,16 +4562,16 @@ function brush$1(dim) {
                 state = that.__brush,
                 emit = emitter(that, arguments),
                 selection0 = state.selection,
-                selection1 = dim.input(typeof selection$$1 === "function" ? selection$$1.apply(this, arguments) : selection$$1, state.extent),
+                selection1 = dim.input(typeof selection === "function" ? selection.apply(this, arguments) : selection, state.extent),
                 i = interpolateValue(selection0, selection1);
 
             function tween(t) {
-              state.selection = t === 1 && empty$1(selection1) ? null : i(t);
+              state.selection = t === 1 && selection1 === null ? null : i(t);
               redraw.call(that);
               emit.brush();
             }
 
-            return selection0 && selection1 ? tween : tween(1);
+            return selection0 !== null && selection1 !== null ? tween : tween(1);
           });
     } else {
       group
@@ -4470,35 +4579,39 @@ function brush$1(dim) {
             var that = this,
                 args = arguments,
                 state = that.__brush,
-                selection1 = dim.input(typeof selection$$1 === "function" ? selection$$1.apply(that, args) : selection$$1, state.extent),
+                selection1 = dim.input(typeof selection === "function" ? selection.apply(that, args) : selection, state.extent),
                 emit = emitter(that, args).beforestart();
 
             interrupt(that);
-            state.selection = selection1 == null || empty$1(selection1) ? null : selection1;
+            state.selection = selection1 === null ? null : selection1;
             redraw.call(that);
             emit.start().brush().end();
           });
     }
   };
 
+  brush.clear = function(group) {
+    brush.move(group, null);
+  };
+
   function redraw() {
     var group = select(this),
-        selection$$1 = local$1(this).selection;
+        selection = local$1(this).selection;
 
-    if (selection$$1) {
+    if (selection) {
       group.selectAll(".selection")
           .style("display", null)
-          .attr("x", selection$$1[0][0])
-          .attr("y", selection$$1[0][1])
-          .attr("width", selection$$1[1][0] - selection$$1[0][0])
-          .attr("height", selection$$1[1][1] - selection$$1[0][1]);
+          .attr("x", selection[0][0])
+          .attr("y", selection[0][1])
+          .attr("width", selection[1][0] - selection[0][0])
+          .attr("height", selection[1][1] - selection[0][1]);
 
       group.selectAll(".handle")
           .style("display", null)
-          .attr("x", function(d) { return d.type[d.type.length - 1] === "e" ? selection$$1[1][0] - handleSize / 2 : selection$$1[0][0] - handleSize / 2; })
-          .attr("y", function(d) { return d.type[0] === "s" ? selection$$1[1][1] - handleSize / 2 : selection$$1[0][1] - handleSize / 2; })
-          .attr("width", function(d) { return d.type === "n" || d.type === "s" ? selection$$1[1][0] - selection$$1[0][0] + handleSize : handleSize; })
-          .attr("height", function(d) { return d.type === "e" || d.type === "w" ? selection$$1[1][1] - selection$$1[0][1] + handleSize : handleSize; });
+          .attr("x", function(d) { return d.type[d.type.length - 1] === "e" ? selection[1][0] - handleSize / 2 : selection[0][0] - handleSize / 2; })
+          .attr("y", function(d) { return d.type[0] === "s" ? selection[1][1] - handleSize / 2 : selection[0][1] - handleSize / 2; })
+          .attr("width", function(d) { return d.type === "n" || d.type === "s" ? selection[1][0] - selection[0][0] + handleSize : handleSize; })
+          .attr("height", function(d) { return d.type === "e" || d.type === "w" ? selection[1][1] - selection[0][1] + handleSize : handleSize; });
     }
 
     else {
@@ -4511,8 +4624,8 @@ function brush$1(dim) {
     }
   }
 
-  function emitter(that, args) {
-    return that.__brush.emitter || new Emitter(that, args);
+  function emitter(that, args, clean) {
+    return (!clean && that.__brush.emitter) || new Emitter(that, args);
   }
 
   function Emitter(that, args) {
@@ -4529,6 +4642,7 @@ function brush$1(dim) {
     },
     start: function() {
       if (this.starting) this.starting = false, this.emit("start");
+      else this.emit("brush");
       return this;
     },
     brush: function() {
@@ -4545,42 +4659,43 @@ function brush$1(dim) {
   };
 
   function started() {
-    if (exports.event.touches) { if (exports.event.changedTouches.length < exports.event.touches.length) return noevent$1(); }
-    else if (touchending) return;
+    if (touchending && !exports.event.touches) return;
     if (!filter.apply(this, arguments)) return;
 
     var that = this,
         type = exports.event.target.__data__.type,
-        mode = (exports.event.metaKey ? type = "overlay" : type) === "selection" ? MODE_DRAG : (exports.event.altKey ? MODE_CENTER : MODE_HANDLE),
+        mode = (keys && exports.event.metaKey ? type = "overlay" : type) === "selection" ? MODE_DRAG : (keys && exports.event.altKey ? MODE_CENTER : MODE_HANDLE),
         signX = dim === Y ? null : signsX[type],
         signY = dim === X ? null : signsY[type],
         state = local$1(that),
         extent = state.extent,
-        selection$$1 = state.selection,
+        selection = state.selection,
         W = extent[0][0], w0, w1,
         N = extent[0][1], n0, n1,
         E = extent[1][0], e0, e1,
         S = extent[1][1], s0, s1,
-        dx,
-        dy,
+        dx = 0,
+        dy = 0,
         moving,
-        shifting = signX && signY && exports.event.shiftKey,
+        shifting = signX && signY && keys && exports.event.shiftKey,
         lockX,
         lockY,
-        point0 = mouse(that),
-        point$$1 = point0,
-        emit = emitter(that, arguments).beforestart();
+        pointer = exports.event.touches ? toucher(exports.event.changedTouches[0].identifier) : mouse,
+        point0 = pointer(that),
+        point = point0,
+        emit = emitter(that, arguments, true).beforestart();
 
     if (type === "overlay") {
-      state.selection = selection$$1 = [
+      if (selection) moving = true;
+      state.selection = selection = [
         [w0 = dim === Y ? W : point0[0], n0 = dim === X ? N : point0[1]],
         [e0 = dim === Y ? E : w0, s0 = dim === X ? S : n0]
       ];
     } else {
-      w0 = selection$$1[0][0];
-      n0 = selection$$1[0][1];
-      e0 = selection$$1[1][0];
-      s0 = selection$$1[1][1];
+      w0 = selection[0][0];
+      n0 = selection[0][1];
+      e0 = selection[1][0];
+      s0 = selection[1][1];
     }
 
     w1 = w0;
@@ -4595,15 +4710,15 @@ function brush$1(dim) {
         .attr("cursor", cursors[type]);
 
     if (exports.event.touches) {
-      group
-          .on("touchmove.brush", moved, true)
-          .on("touchend.brush touchcancel.brush", ended, true);
+      emit.moved = moved;
+      emit.ended = ended;
     } else {
       var view = select(exports.event.view)
-          .on("keydown.brush", keydowned, true)
-          .on("keyup.brush", keyupped, true)
           .on("mousemove.brush", moved, true)
           .on("mouseup.brush", ended, true);
+      if (keys) view
+          .on("keydown.brush", keydowned, true)
+          .on("keyup.brush", keyupped, true);
 
       dragDisable(exports.event.view);
     }
@@ -4614,12 +4729,12 @@ function brush$1(dim) {
     emit.start();
 
     function moved() {
-      var point1 = mouse(that);
+      var point1 = pointer(that);
       if (shifting && !lockX && !lockY) {
-        if (Math.abs(point1[0] - point$$1[0]) > Math.abs(point1[1] - point$$1[1])) lockY = true;
+        if (Math.abs(point1[0] - point[0]) > Math.abs(point1[1] - point[1])) lockY = true;
         else lockX = true;
       }
-      point$$1 = point1;
+      point = point1;
       moving = true;
       noevent$1();
       move();
@@ -4628,8 +4743,8 @@ function brush$1(dim) {
     function move() {
       var t;
 
-      dx = point$$1[0] - point0[0];
-      dy = point$$1[1] - point0[1];
+      dx = point[0] - point0[0];
+      dy = point[1] - point0[1];
 
       switch (mode) {
         case MODE_SPACE:
@@ -4666,14 +4781,14 @@ function brush$1(dim) {
         if (type in flipY) overlay.attr("cursor", cursors[type = flipY[type]]);
       }
 
-      if (state.selection) selection$$1 = state.selection; // May be set by brush.move!
-      if (lockX) w1 = selection$$1[0][0], e1 = selection$$1[1][0];
-      if (lockY) n1 = selection$$1[0][1], s1 = selection$$1[1][1];
+      if (state.selection) selection = state.selection; // May be set by brush.move!
+      if (lockX) w1 = selection[0][0], e1 = selection[1][0];
+      if (lockY) n1 = selection[0][1], s1 = selection[1][1];
 
-      if (selection$$1[0][0] !== w1
-          || selection$$1[0][1] !== n1
-          || selection$$1[1][0] !== e1
-          || selection$$1[1][1] !== s1) {
+      if (selection[0][0] !== w1
+          || selection[0][1] !== n1
+          || selection[1][0] !== e1
+          || selection[1][1] !== s1) {
         state.selection = [[w1, n1], [e1, s1]];
         redraw.call(that);
         emit.brush();
@@ -4686,15 +4801,14 @@ function brush$1(dim) {
         if (exports.event.touches.length) return;
         if (touchending) clearTimeout(touchending);
         touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed!
-        group.on("touchmove.brush touchend.brush touchcancel.brush", null);
       } else {
         yesdrag(exports.event.view, moving);
         view.on("keydown.brush keyup.brush mousemove.brush mouseup.brush", null);
       }
       group.attr("pointer-events", "all");
       overlay.attr("cursor", cursors.overlay);
-      if (state.selection) selection$$1 = state.selection; // May be set by brush.move (on start)!
-      if (empty$1(selection$$1)) state.selection = null, redraw.call(that);
+      if (state.selection) selection = state.selection; // May be set by brush.move (on start)!
+      if (empty$1(selection)) state.selection = null, redraw.call(that);
       emit.end();
     }
 
@@ -4768,25 +4882,41 @@ function brush$1(dim) {
     }
   }
 
+  function touchmoved() {
+    emitter(this, arguments).moved();
+  }
+
+  function touchended() {
+    emitter(this, arguments).ended();
+  }
+
   function initialize() {
     var state = this.__brush || {selection: null};
-    state.extent = extent.apply(this, arguments);
+    state.extent = number2(extent.apply(this, arguments));
     state.dim = dim;
     return state;
   }
 
   brush.extent = function(_) {
-    return arguments.length ? (extent = typeof _ === "function" ? _ : constant$4([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), brush) : extent;
+    return arguments.length ? (extent = typeof _ === "function" ? _ : constant$4(number2(_)), brush) : extent;
   };
 
   brush.filter = function(_) {
     return arguments.length ? (filter = typeof _ === "function" ? _ : constant$4(!!_), brush) : filter;
   };
 
+  brush.touchable = function(_) {
+    return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$4(!!_), brush) : touchable;
+  };
+
   brush.handleSize = function(_) {
     return arguments.length ? (handleSize = +_, brush) : handleSize;
   };
 
+  brush.keyModifiers = function(_) {
+    return arguments.length ? (keys = !!_, brush) : keys;
+  };
+
   brush.on = function() {
     var value = listeners.on.apply(listeners, arguments);
     return value === listeners ? brush : value;
@@ -5013,7 +5143,7 @@ Path.prototype = path.prototype = {
     }
   },
   arc: function(x, y, r, a0, a1, ccw) {
-    x = +x, y = +y, r = +r;
+    x = +x, y = +y, r = +r, ccw = !!ccw;
     var dx = r * Math.cos(a0),
         dy = r * Math.sin(a0),
         x0 = x + dx,
@@ -5413,11 +5543,11 @@ var cases = [
 function contours() {
   var dx = 1,
       dy = 1,
-      threshold$$1 = thresholdSturges,
+      threshold = thresholdSturges,
       smooth = smoothLinear;
 
   function contours(values) {
-    var tz = threshold$$1(values);
+    var tz = threshold(values);
 
     // Convert number of thresholds into uniform thresholds.
     if (!Array.isArray(tz)) {
@@ -5577,7 +5707,7 @@ function contours() {
   };
 
   contours.thresholds = function(_) {
-    return arguments.length ? (threshold$$1 = typeof _ === "function" ? _ : Array.isArray(_) ? constant$6(slice$3.call(_)) : constant$6(_), contours) : threshold$$1;
+    return arguments.length ? (threshold = typeof _ === "function" ? _ : Array.isArray(_) ? constant$6(slice$3.call(_)) : constant$6(_), contours) : threshold;
   };
 
   contours.smooth = function(_) {
@@ -5654,7 +5784,7 @@ function density() {
       o = r * 3, // grid offset, to pad for blur
       n = (dx + o * 2) >> k, // grid width
       m = (dy + o * 2) >> k, // grid height
-      threshold$$1 = constant$6(20);
+      threshold = constant$6(20);
 
   function density(data) {
     var values0 = new Float32Array(n * m),
@@ -5677,7 +5807,7 @@ function density() {
     blurX({width: n, height: m, data: values0}, {width: n, height: m, data: values1}, r >> k);
     blurY({width: n, height: m, data: values1}, {width: n, height: m, data: values0}, r >> k);
 
-    var tz = threshold$$1(values0);
+    var tz = threshold(values0);
 
     // Convert number of thresholds into uniform thresholds.
     if (!Array.isArray(tz)) {
@@ -5747,7 +5877,7 @@ function density() {
   };
 
   density.thresholds = function(_) {
-    return arguments.length ? (threshold$$1 = typeof _ === "function" ? _ : Array.isArray(_) ? constant$6(slice$3.call(_)) : constant$6(_), density) : threshold$$1;
+    return arguments.length ? (threshold = typeof _ === "function" ? _ : Array.isArray(_) ? constant$6(slice$3.call(_)) : constant$6(_), density) : threshold;
   };
 
   density.bandwidth = function(_) {
@@ -5767,7 +5897,7 @@ var EOL = {},
 
 function objectConverter(columns) {
   return new Function("d", "return {" + columns.map(function(name, i) {
-    return JSON.stringify(name) + ": d[" + i + "]";
+    return JSON.stringify(name) + ": d[" + i + "] || \"\"";
   }).join(",") + "}");
 }
 
@@ -5811,7 +5941,7 @@ function formatDate(date) {
       seconds = date.getUTCSeconds(),
       milliseconds = date.getUTCMilliseconds();
   return isNaN(date) ? "Invalid Date"
-      : formatYear(date.getUTCFullYear(), 4) + "-" + pad(date.getUTCMonth() + 1, 2) + "-" + pad(date.getUTCDate(), 2)
+      : formatYear(date.getUTCFullYear()) + "-" + pad(date.getUTCMonth() + 1, 2) + "-" + pad(date.getUTCDate(), 2)
       + (milliseconds ? "T" + pad(hours, 2) + ":" + pad(minutes, 2) + ":" + pad(seconds, 2) + "." + pad(milliseconds, 3) + "Z"
       : seconds ? "T" + pad(hours, 2) + ":" + pad(minutes, 2) + ":" + pad(seconds, 2) + "Z"
       : minutes || hours ? "T" + pad(hours, 2) + ":" + pad(minutes, 2) + "Z"
@@ -5918,7 +6048,9 @@ function dsvFormat(delimiter) {
     parseRows: parseRows,
     format: format,
     formatBody: formatBody,
-    formatRows: formatRows
+    formatRows: formatRows,
+    formatRow: formatRow,
+    formatValue: formatValue
   };
 }
 
@@ -5929,6 +6061,8 @@ var csvParseRows = csv.parseRows;
 var csvFormat = csv.format;
 var csvFormatBody = csv.formatBody;
 var csvFormatRows = csv.formatRows;
+var csvFormatRow = csv.formatRow;
+var csvFormatValue = csv.formatValue;
 
 var tsv = dsvFormat("\t");
 
@@ -5937,22 +6071,30 @@ var tsvParseRows = tsv.parseRows;
 var tsvFormat = tsv.format;
 var tsvFormatBody = tsv.formatBody;
 var tsvFormatRows = tsv.formatRows;
+var tsvFormatRow = tsv.formatRow;
+var tsvFormatValue = tsv.formatValue;
 
 function autoType(object) {
   for (var key in object) {
-    var value = object[key].trim(), number;
+    var value = object[key].trim(), number, m;
     if (!value) value = null;
     else if (value === "true") value = true;
     else if (value === "false") value = false;
     else if (value === "NaN") value = NaN;
     else if (!isNaN(number = +value)) value = number;
-    else if (/^([-+]\d{2})?\d{4}(-\d{2}(-\d{2})?)?(T\d{2}:\d{2}(:\d{2}(\.\d{3})?)?(Z|[-+]\d{2}:\d{2})?)?$/.test(value)) value = new Date(value);
+    else if (m = value.match(/^([-+]\d{2})?\d{4}(-\d{2}(-\d{2})?)?(T\d{2}:\d{2}(:\d{2}(\.\d{3})?)?(Z|[-+]\d{2}:\d{2})?)?$/)) {
+      if (fixtz && !!m[4] && !m[7]) value = value.replace(/-/g, "/").replace(/T/, " ");
+      value = new Date(value);
+    }
     else continue;
     object[key] = value;
   }
   return object;
 }
 
+// https://github.com/d3/d3-dsv/issues/45
+var fixtz = new Date("2019-01-01T00:00").getHours() || new Date("2019-07-01T00:00").getHours();
+
 function responseBlob(response) {
   if (!response.ok) throw new Error(response.status + " " + response.statusText);
   return response.blob();
@@ -6021,8 +6163,8 @@ function json(input, init) {
 
 function parser(type) {
   return function(input, init)  {
-    return text(input, init).then(function(text$$1) {
-      return (new DOMParser).parseFromString(text$$1, type);
+    return text(input, init).then(function(text) {
+      return (new DOMParser).parseFromString(text, type);
     });
   };
 }
@@ -7139,24 +7281,35 @@ function formatNumerals(numerals) {
 var re = /^(?:(.)?([<>=^]))?([+\-( ])?([$#])?(0)?(\d+)?(,)?(\.\d+)?(~)?([a-z%])?$/i;
 
 function formatSpecifier(specifier) {
-  return new FormatSpecifier(specifier);
+  if (!(match = re.exec(specifier))) throw new Error("invalid format: " + specifier);
+  var match;
+  return new FormatSpecifier({
+    fill: match[1],
+    align: match[2],
+    sign: match[3],
+    symbol: match[4],
+    zero: match[5],
+    width: match[6],
+    comma: match[7],
+    precision: match[8] && match[8].slice(1),
+    trim: match[9],
+    type: match[10]
+  });
 }
 
 formatSpecifier.prototype = FormatSpecifier.prototype; // instanceof
 
 function FormatSpecifier(specifier) {
-  if (!(match = re.exec(specifier))) throw new Error("invalid format: " + specifier);
-  var match;
-  this.fill = match[1] || " ";
-  this.align = match[2] || ">";
-  this.sign = match[3] || "-";
-  this.symbol = match[4] || "";
-  this.zero = !!match[5];
-  this.width = match[6] && +match[6];
-  this.comma = !!match[7];
-  this.precision = match[8] && +match[8].slice(1);
-  this.trim = !!match[9];
-  this.type = match[10] || "";
+  this.fill = specifier.fill === undefined ? " " : specifier.fill + "";
+  this.align = specifier.align === undefined ? ">" : specifier.align + "";
+  this.sign = specifier.sign === undefined ? "-" : specifier.sign + "";
+  this.symbol = specifier.symbol === undefined ? "" : specifier.symbol + "";
+  this.zero = !!specifier.zero;
+  this.width = specifier.width === undefined ? undefined : +specifier.width;
+  this.comma = !!specifier.comma;
+  this.precision = specifier.precision === undefined ? undefined : +specifier.precision;
+  this.trim = !!specifier.trim;
+  this.type = specifier.type === undefined ? "" : specifier.type + "";
 }
 
 FormatSpecifier.prototype.toString = function() {
@@ -7165,9 +7318,9 @@ FormatSpecifier.prototype.toString = function() {
       + this.sign
       + this.symbol
       + (this.zero ? "0" : "")
-      + (this.width == null ? "" : Math.max(1, this.width | 0))
+      + (this.width === undefined ? "" : Math.max(1, this.width | 0))
       + (this.comma ? "," : "")
-      + (this.precision == null ? "" : "." + Math.max(0, this.precision | 0))
+      + (this.precision === undefined ? "" : "." + Math.max(0, this.precision | 0))
       + (this.trim ? "~" : "")
       + this.type;
 };
@@ -7178,7 +7331,7 @@ function formatTrim(s) {
     switch (s[i]) {
       case ".": i0 = i1 = i; break;
       case "0": if (i0 === 0) i0 = i; i1 = i; break;
-      default: if (i0 > 0) { if (!+s[i]) break out; i0 = 0; } break;
+      default: if (!+s[i]) break out; if (i0 > 0) i0 = 0; break;
     }
   }
   return i0 > 0 ? s.slice(0, i0) + s.slice(i1 + 1) : s;
@@ -7229,14 +7382,18 @@ function identity$3(x) {
   return x;
 }
 
-var prefixes = ["y","z","a","f","p","n","\xB5","m","","k","M","G","T","P","E","Z","Y"];
+var map$2 = Array.prototype.map,
+    prefixes = ["y","z","a","f","p","n","\xB5","m","","k","M","G","T","P","E","Z","Y"];
 
 function formatLocale(locale) {
-  var group = locale.grouping && locale.thousands ? formatGroup(locale.grouping, locale.thousands) : identity$3,
-      currency = locale.currency,
-      decimal = locale.decimal,
-      numerals = locale.numerals ? formatNumerals(locale.numerals) : identity$3,
-      percent = locale.percent || "%";
+  var group = locale.grouping === undefined || locale.thousands === undefined ? identity$3 : formatGroup(map$2.call(locale.grouping, Number), locale.thousands + ""),
+      currencyPrefix = locale.currency === undefined ? "" : locale.currency[0] + "",
+      currencySuffix = locale.currency === undefined ? "" : locale.currency[1] + "",
+      decimal = locale.decimal === undefined ? "." : locale.decimal + "",
+      numerals = locale.numerals === undefined ? identity$3 : formatNumerals(map$2.call(locale.numerals, String)),
+      percent = locale.percent === undefined ? "%" : locale.percent + "",
+      minus = locale.minus === undefined ? "-" : locale.minus + "",
+      nan = locale.nan === undefined ? "NaN" : locale.nan + "";
 
   function newFormat(specifier) {
     specifier = formatSpecifier(specifier);
@@ -7256,15 +7413,15 @@ function formatLocale(locale) {
     if (type === "n") comma = true, type = "g";
 
     // The "" type, and any invalid type, is an alias for ".12~g".
-    else if (!formatTypes[type]) precision == null && (precision = 12), trim = true, type = "g";
+    else if (!formatTypes[type]) precision === undefined && (precision = 12), trim = true, type = "g";
 
     // If zero fill is specified, padding goes after sign and before digits.
     if (zero || (fill === "0" && align === "=")) zero = true, fill = "0", align = "=";
 
     // Compute the prefix and suffix.
     // For SI-prefix, the suffix is lazily computed.
-    var prefix = symbol === "$" ? currency[0] : symbol === "#" && /[boxX]/.test(type) ? "0" + type.toLowerCase() : "",
-        suffix = symbol === "$" ? currency[1] : /[%p]/.test(type) ? percent : "";
+    var prefix = symbol === "$" ? currencyPrefix : symbol === "#" && /[boxX]/.test(type) ? "0" + type.toLowerCase() : "",
+        suffix = symbol === "$" ? currencySuffix : /[%p]/.test(type) ? percent : "";
 
     // What format function should we use?
     // Is this an integer type?
@@ -7276,7 +7433,7 @@ function formatLocale(locale) {
     // or clamp the specified precision to the supported range.
     // For significant precision, it must be in [1, 21].
     // For fixed precision, it must be in [0, 20].
-    precision = precision == null ? 6
+    precision = precision === undefined ? 6
         : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision))
         : Math.max(0, Math.min(20, precision));
 
@@ -7291,18 +7448,20 @@ function formatLocale(locale) {
       } else {
         value = +value;
 
+        // Determine the sign. -0 is not less than 0, but 1 / -0 is!
+        var valueNegative = value < 0 || 1 / value < 0;
+
         // Perform the initial formatting.
-        var valueNegative = value < 0;
-        value = formatType(Math.abs(value), precision);
+        value = isNaN(value) ? nan : formatType(Math.abs(value), precision);
 
         // Trim insignificant zeros.
         if (trim) value = formatTrim(value);
 
-        // If a negative value rounds to zero during formatting, treat as positive.
-        if (valueNegative && +value === 0) valueNegative = false;
+        // If a negative value rounds to zero after formatting, and no explicit positive sign is requested, hide the sign.
+        if (valueNegative && +value === 0 && sign !== "+") valueNegative = false;
 
         // Compute the prefix and suffix.
-        valuePrefix = (valueNegative ? (sign === "(" ? sign : "-") : sign === "-" || sign === "(" ? "" : sign) + valuePrefix;
+        valuePrefix = (valueNegative ? (sign === "(" ? sign : minus) : sign === "-" || sign === "(" ? "" : sign) + valuePrefix;
         valueSuffix = (type === "s" ? prefixes[8 + prefixExponent / 3] : "") + valueSuffix + (valueNegative && sign === "(" ? ")" : "");
 
         // Break the formatted value into the integer “value” part that can be
@@ -7369,7 +7528,8 @@ defaultLocale({
   decimal: ".",
   thousands: ",",
   grouping: [3],
-  currency: ["$", ""]
+  currency: ["$", ""],
+  minus: "-"
 });
 
 function defaultLocale(definition) {
@@ -7670,6 +7830,9 @@ var boundsStream = {
     else if (deltaSum > epsilon$2) phi1 = 90;
     else if (deltaSum < -epsilon$2) phi0 = -90;
     range[0] = lambda0$1, range[1] = lambda1;
+  },
+  sphere: function() {
+    lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);
   }
 };
 
@@ -7688,14 +7851,14 @@ function linePoint(lambda, phi) {
     cartesianNormalizeInPlace(inflection);
     inflection = spherical(inflection);
     var delta = lambda - lambda2,
-        sign$$1 = delta > 0 ? 1 : -1,
-        lambdai = inflection[0] * degrees$1 * sign$$1,
+        sign = delta > 0 ? 1 : -1,
+        lambdai = inflection[0] * degrees$1 * sign,
         phii,
         antimeridian = abs(delta) > 180;
-    if (antimeridian ^ (sign$$1 * lambda2 < lambdai && lambdai < sign$$1 * lambda)) {
+    if (antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
       phii = inflection[1] * degrees$1;
       if (phii > phi1) phi1 = phii;
-    } else if (lambdai = (lambdai + 360) % 360 - 180, antimeridian ^ (sign$$1 * lambda2 < lambdai && lambdai < sign$$1 * lambda)) {
+    } else if (lambdai = (lambdai + 360) % 360 - 180, antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
       phii = -inflection[1] * degrees$1;
       if (phii < phi0) phi0 = phii;
     } else {
@@ -8240,8 +8403,15 @@ function link$1(array) {
 
 var sum$1 = adder();
 
+function longitude(point) {
+  if (abs(point[0]) <= pi$3)
+    return point[0];
+  else
+    return sign(point[0]) * ((abs(point[0]) + pi$3) % tau$3 - pi$3);
+}
+
 function polygonContains(polygon, point) {
-  var lambda = point[0],
+  var lambda = longitude(point),
       phi = point[1],
       sinPhi = sin$1(phi),
       normal = [sin$1(lambda), -cos$1(lambda), 0],
@@ -8258,25 +8428,25 @@ function polygonContains(polygon, point) {
     var ring,
         m,
         point0 = ring[m - 1],
-        lambda0 = point0[0],
+        lambda0 = longitude(point0),
         phi0 = point0[1] / 2 + quarterPi,
         sinPhi0 = sin$1(phi0),
         cosPhi0 = cos$1(phi0);
 
     for (var j = 0; j < m; ++j, lambda0 = lambda1, sinPhi0 = sinPhi1, cosPhi0 = cosPhi1, point0 = point1) {
       var point1 = ring[j],
-          lambda1 = point1[0],
+          lambda1 = longitude(point1),
           phi1 = point1[1] / 2 + quarterPi,
           sinPhi1 = sin$1(phi1),
           cosPhi1 = cos$1(phi1),
           delta = lambda1 - lambda0,
-          sign$$1 = delta >= 0 ? 1 : -1,
-          absDelta = sign$$1 * delta,
+          sign = delta >= 0 ? 1 : -1,
+          absDelta = sign * delta,
           antimeridian = absDelta > pi$3,
           k = sinPhi0 * sinPhi1;
 
-      sum$1.add(atan2(k * sign$$1 * sin$1(absDelta), cosPhi0 * cosPhi1 + k * cos$1(absDelta)));
-      angle += antimeridian ? delta + sign$$1 * tau$3 : delta;
+      sum$1.add(atan2(k * sign * sin$1(absDelta), cosPhi0 * cosPhi1 + k * cos$1(absDelta)));
+      angle += antimeridian ? delta + sign * tau$3 : delta;
 
       // Are the longitudes either side of the point’s meridian (lambda),
       // and are the latitudes smaller than the parallel (phi)?
@@ -9057,10 +9227,23 @@ function containsPoint(coordinates, point) {
 }
 
 function containsLine(coordinates, point) {
-  var ab = distance(coordinates[0], coordinates[1]),
-      ao = distance(coordinates[0], point),
-      ob = distance(point, coordinates[1]);
-  return ao + ob <= ab + epsilon$2;
+  var ao, bo, ab;
+  for (var i = 0, n = coordinates.length; i < n; i++) {
+    bo = distance(coordinates[i], point);
+    if (bo === 0) return true;
+    if (i > 0) {
+      ab = distance(coordinates[i], coordinates[i - 1]);
+      if (
+        ab > 0 &&
+        ao <= ab &&
+        bo <= ab &&
+        (ao + bo - ab) * (1 - Math.pow((ao - bo) / ab, 2)) < epsilon2$1 * ab
+      )
+        return true;
+    }
+    ao = bo;
+  }
+  return false;
 }
 
 function containsPolygon(coordinates, point) {
@@ -9772,17 +9955,18 @@ function transformRotate(rotate) {
   });
 }
 
-function scaleTranslate(k, dx, dy) {
-  function transform$$1(x, y) {
+function scaleTranslate(k, dx, dy, sx, sy) {
+  function transform(x, y) {
+    x *= sx; y *= sy;
     return [dx + k * x, dy - k * y];
   }
-  transform$$1.invert = function(x, y) {
-    return [(x - dx) / k, (dy - y) / k];
+  transform.invert = function(x, y) {
+    return [(x - dx) / k * sx, (dy - y) / k * sy];
   };
-  return transform$$1;
+  return transform;
 }
 
-function scaleTranslateRotate(k, dx, dy, alpha) {
+function scaleTranslateRotate(k, dx, dy, sx, sy, alpha) {
   var cosAlpha = cos$1(alpha),
       sinAlpha = sin$1(alpha),
       a = cosAlpha * k,
@@ -9791,13 +9975,14 @@ function scaleTranslateRotate(k, dx, dy, alpha) {
       bi = sinAlpha / k,
       ci = (sinAlpha * dy - cosAlpha * dx) / k,
       fi = (sinAlpha * dx + cosAlpha * dy) / k;
-  function transform$$1(x, y) {
+  function transform(x, y) {
+    x *= sx; y *= sy;
     return [a * x - b * y + dx, dy - b * x - a * y];
   }
-  transform$$1.invert = function(x, y) {
-    return [ai * x - bi * y + ci, fi - bi * x - ai * y];
+  transform.invert = function(x, y) {
+    return [sx * (ai * x - bi * y + ci), sy * (fi - bi * x - ai * y)];
   };
-  return transform$$1;
+  return transform;
 }
 
 function projection(project) {
@@ -9810,7 +9995,9 @@ function projectionMutator(projectAt) {
       x = 480, y = 250, // translate
       lambda = 0, phi = 0, // center
       deltaLambda = 0, deltaPhi = 0, deltaGamma = 0, rotate, // pre-rotate
-      alpha = 0, // post-rotate
+      alpha = 0, // post-rotate angle
+      sx = 1, // reflectX
+      sy = 1, // reflectX
       theta = null, preclip = clipAntimeridian, // pre-clip angle
       x0 = null, y0, x1, y1, postclip = identity$4, // post-clip extent
       delta2 = 0.5, // precision
@@ -9869,6 +10056,14 @@ function projectionMutator(projectAt) {
     return arguments.length ? (alpha = _ % 360 * radians, recenter()) : alpha * degrees$1;
   };
 
+  projection.reflectX = function(_) {
+    return arguments.length ? (sx = _ ? -1 : 1, recenter()) : sx < 0;
+  };
+
+  projection.reflectY = function(_) {
+    return arguments.length ? (sy = _ ? -1 : 1, recenter()) : sy < 0;
+  };
+
   projection.precision = function(_) {
     return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt(delta2);
   };
@@ -9890,10 +10085,10 @@ function projectionMutator(projectAt) {
   };
 
   function recenter() {
-    var center = scaleTranslateRotate(k, 0, 0, alpha).apply(null, project(lambda, phi)),
-        transform$$1 = (alpha ? scaleTranslateRotate : scaleTranslate)(k, x - center[0], y - center[1], alpha);
+    var center = scaleTranslateRotate(k, 0, 0, sx, sy, alpha).apply(null, project(lambda, phi)),
+        transform = (alpha ? scaleTranslateRotate : scaleTranslate)(k, x - center[0], y - center[1], sx, sy, alpha);
     rotate = rotateRadians(deltaLambda, deltaPhi, deltaGamma);
-    projectTransform = compose(project, transform$$1);
+    projectTransform = compose(project, transform);
     projectRotateTransform = compose(rotate, projectTransform);
     projectResample = resample(projectTransform, delta2);
     return reset();
@@ -9952,8 +10147,11 @@ function conicEqualAreaRaw(y0, y1) {
   }
 
   project.invert = function(x, y) {
-    var r0y = r0 - y;
-    return [atan2(x, abs(r0y)) / n * sign(r0y), asin((c - (x * x + r0y * r0y) * n * n) / (2 * n))];
+    var r0y = r0 - y,
+        l = atan2(x, abs(r0y)) * sign(r0y);
+    if (r0y * n < 0)
+      l -= pi$3 * sign(x) * sign(r0y);
+    return [l / n, asin((c - (x * x + r0y * r0y) * n * n) / (2 * n))];
   };
 
   return project;
@@ -10202,8 +10400,11 @@ function conicConformalRaw(y0, y1) {
   }
 
   project.invert = function(x, y) {
-    var fy = f - y, r = sign(n) * sqrt(x * x + fy * fy);
-    return [atan2(x, abs(fy)) / n * sign(fy), 2 * atan(pow(f / r, 1 / n)) - halfPi$2];
+    var fy = f - y, r = sign(n) * sqrt(x * x + fy * fy),
+      l = atan2(x, abs(fy)) * sign(fy);
+    if (fy * n < 0)
+      l -= pi$3 * sign(x) * sign(fy);
+    return [l / n, 2 * atan(pow(f / r, 1 / n)) - halfPi$2];
   };
 
   return project;
@@ -10239,8 +10440,11 @@ function conicEquidistantRaw(y0, y1) {
   }
 
   project.invert = function(x, y) {
-    var gy = g - y;
-    return [atan2(x, abs(gy)) / n * sign(gy), g - sign(n) * sqrt(x * x + gy * gy)];
+    var gy = g - y,
+        l = atan2(x, abs(gy)) * sign(gy);
+    if (gy * n < 0)
+      l -= pi$3 * sign(x) * sign(gy);
+    return [l / n, g - sign(n) * sqrt(x * x + gy * gy)];
   };
 
   return project;
@@ -10299,62 +10503,84 @@ function gnomonic() {
       .clipAngle(60);
 }
 
-function scaleTranslate$1(kx, ky, tx, ty) {
-  return kx === 1 && ky === 1 && tx === 0 && ty === 0 ? identity$4 : transformer({
-    point: function(x, y) {
-      this.stream.point(x * kx + tx, y * ky + ty);
-    }
-  });
-}
-
 function identity$5() {
-  var k = 1, tx = 0, ty = 0, sx = 1, sy = 1, transform$$1 = identity$4, // scale, translate and reflect
+  var k = 1, tx = 0, ty = 0, sx = 1, sy = 1, // scale, translate and reflect
+      alpha = 0, ca, sa, // angle
       x0 = null, y0, x1, y1, // clip extent
+      kx = 1, ky = 1,
+      transform = transformer({
+        point: function(x, y) {
+          var p = projection([x, y]);
+          this.stream.point(p[0], p[1]);
+        }
+      }),
       postclip = identity$4,
       cache,
-      cacheStream,
-      projection;
+      cacheStream;
 
   function reset() {
+    kx = k * sx;
+    ky = k * sy;
     cache = cacheStream = null;
     return projection;
   }
 
-  return projection = {
-    stream: function(stream) {
-      return cache && cacheStream === stream ? cache : cache = transform$$1(postclip(cacheStream = stream));
-    },
-    postclip: function(_) {
-      return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
-    },
-    clipExtent: function(_) {
-      return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$4) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
-    },
-    scale: function(_) {
-      return arguments.length ? (transform$$1 = scaleTranslate$1((k = +_) * sx, k * sy, tx, ty), reset()) : k;
-    },
-    translate: function(_) {
-      return arguments.length ? (transform$$1 = scaleTranslate$1(k * sx, k * sy, tx = +_[0], ty = +_[1]), reset()) : [tx, ty];
-    },
-    reflectX: function(_) {
-      return arguments.length ? (transform$$1 = scaleTranslate$1(k * (sx = _ ? -1 : 1), k * sy, tx, ty), reset()) : sx < 0;
-    },
-    reflectY: function(_) {
-      return arguments.length ? (transform$$1 = scaleTranslate$1(k * sx, k * (sy = _ ? -1 : 1), tx, ty), reset()) : sy < 0;
-    },
-    fitExtent: function(extent, object) {
-      return fitExtent(projection, extent, object);
-    },
-    fitSize: function(size, object) {
-      return fitSize(projection, size, object);
-    },
-    fitWidth: function(width, object) {
-      return fitWidth(projection, width, object);
-    },
-    fitHeight: function(height, object) {
-      return fitHeight(projection, height, object);
+  function projection (p) {
+    var x = p[0] * kx, y = p[1] * ky;
+    if (alpha) {
+      var t = y * ca - x * sa;
+      x = x * ca + y * sa;
+      y = t;
+    }    
+    return [x + tx, y + ty];
+  }
+  projection.invert = function(p) {
+    var x = p[0] - tx, y = p[1] - ty;
+    if (alpha) {
+      var t = y * ca + x * sa;
+      x = x * ca - y * sa;
+      y = t;
     }
+    return [x / kx, y / ky];
+  };
+  projection.stream = function(stream) {
+    return cache && cacheStream === stream ? cache : cache = transform(postclip(cacheStream = stream));
+  };
+  projection.postclip = function(_) {
+    return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
+  };
+  projection.clipExtent = function(_) {
+    return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$4) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
+  };
+  projection.scale = function(_) {
+    return arguments.length ? (k = +_, reset()) : k;
+  };
+  projection.translate = function(_) {
+    return arguments.length ? (tx = +_[0], ty = +_[1], reset()) : [tx, ty];
+  };
+  projection.angle = function(_) {
+    return arguments.length ? (alpha = _ % 360 * radians, sa = sin$1(alpha), ca = cos$1(alpha), reset()) : alpha * degrees$1;
+  };
+  projection.reflectX = function(_) {
+    return arguments.length ? (sx = _ ? -1 : 1, reset()) : sx < 0;
+  };
+  projection.reflectY = function(_) {
+    return arguments.length ? (sy = _ ? -1 : 1, reset()) : sy < 0;
+  };
+  projection.fitExtent = function(extent, object) {
+    return fitExtent(projection, extent, object);
   };
+  projection.fitSize = function(size, object) {
+    return fitSize(projection, size, object);
+  };
+  projection.fitWidth = function(width, object) {
+    return fitWidth(projection, width, object);
+  };
+  projection.fitHeight = function(height, object) {
+    return fitHeight(projection, height, object);
+  };
+
+  return projection;
 }
 
 function naturalEarth1Raw(lambda, phi) {
@@ -11951,7 +12177,7 @@ function initInterpolator(domain, interpolator) {
 
 var array$3 = Array.prototype;
 
-var map$2 = array$3.map;
+var map$3 = array$3.map;
 var slice$5 = array$3.slice;
 
 var implicit = {name: "implicit"};
@@ -12000,7 +12226,7 @@ function band() {
   var scale = ordinal().unknown(undefined),
       domain = scale.domain,
       ordinalRange = scale.range,
-      range$$1 = [0, 1],
+      range = [0, 1],
       step,
       bandwidth,
       round = false,
@@ -12012,9 +12238,9 @@ function band() {
 
   function rescale() {
     var n = domain().length,
-        reverse = range$$1[1] < range$$1[0],
-        start = range$$1[reverse - 0],
-        stop = range$$1[1 - reverse];
+        reverse = range[1] < range[0],
+        start = range[reverse - 0],
+        stop = range[1 - reverse];
     step = (stop - start) / Math.max(1, n - paddingInner + paddingOuter * 2);
     if (round) step = Math.floor(step);
     start += (stop - start - step * (n - paddingInner)) * align;
@@ -12029,11 +12255,11 @@ function band() {
   };
 
   scale.range = function(_) {
-    return arguments.length ? (range$$1 = [+_[0], +_[1]], rescale()) : range$$1.slice();
+    return arguments.length ? (range = [+_[0], +_[1]], rescale()) : range.slice();
   };
 
   scale.rangeRound = function(_) {
-    return range$$1 = [+_[0], +_[1]], round = true, rescale();
+    return range = [+_[0], +_[1]], round = true, rescale();
   };
 
   scale.bandwidth = function() {
@@ -12065,7 +12291,7 @@ function band() {
   };
 
   scale.copy = function() {
-    return band(domain(), range$$1)
+    return band(domain(), range)
         .round(round)
         .paddingInner(paddingInner)
         .paddingOuter(paddingOuter)
@@ -12123,14 +12349,14 @@ function clamper(domain) {
 
 // normalize(a, b)(x) takes a domain value x in [a,b] and returns the corresponding parameter t in [0,1].
 // interpolate(a, b)(t) takes a parameter t in [0,1] and returns the corresponding range value x in [a,b].
-function bimap(domain, range, interpolate$$1) {
+function bimap(domain, range, interpolate) {
   var d0 = domain[0], d1 = domain[1], r0 = range[0], r1 = range[1];
-  if (d1 < d0) d0 = normalize(d1, d0), r0 = interpolate$$1(r1, r0);
-  else d0 = normalize(d0, d1), r0 = interpolate$$1(r0, r1);
+  if (d1 < d0) d0 = normalize(d1, d0), r0 = interpolate(r1, r0);
+  else d0 = normalize(d0, d1), r0 = interpolate(r0, r1);
   return function(x) { return r0(d0(x)); };
 }
 
-function polymap(domain, range, interpolate$$1) {
+function polymap(domain, range, interpolate) {
   var j = Math.min(domain.length, range.length) - 1,
       d = new Array(j),
       r = new Array(j),
@@ -12144,7 +12370,7 @@ function polymap(domain, range, interpolate$$1) {
 
   while (++i < j) {
     d[i] = normalize(domain[i], domain[i + 1]);
-    r[i] = interpolate$$1(range[i], range[i + 1]);
+    r[i] = interpolate(range[i], range[i + 1]);
   }
 
   return function(x) {
@@ -12165,31 +12391,31 @@ function copy(source, target) {
 function transformer$1() {
   var domain = unit,
       range = unit,
-      interpolate$$1 = interpolateValue,
+      interpolate = interpolateValue,
       transform,
       untransform,
       unknown,
       clamp = identity$6,
-      piecewise$$1,
+      piecewise,
       output,
       input;
 
   function rescale() {
-    piecewise$$1 = Math.min(domain.length, range.length) > 2 ? polymap : bimap;
+    piecewise = Math.min(domain.length, range.length) > 2 ? polymap : bimap;
     output = input = null;
     return scale;
   }
 
   function scale(x) {
-    return isNaN(x = +x) ? unknown : (output || (output = piecewise$$1(domain.map(transform), range, interpolate$$1)))(transform(clamp(x)));
+    return isNaN(x = +x) ? unknown : (output || (output = piecewise(domain.map(transform), range, interpolate)))(transform(clamp(x)));
   }
 
   scale.invert = function(y) {
-    return clamp(untransform((input || (input = piecewise$$1(range, domain.map(transform), interpolateNumber)))(y)));
+    return clamp(untransform((input || (input = piecewise(range, domain.map(transform), interpolateNumber)))(y)));
   };
 
   scale.domain = function(_) {
-    return arguments.length ? (domain = map$2.call(_, number$2), clamp === identity$6 || (clamp = clamper(domain)), rescale()) : domain.slice();
+    return arguments.length ? (domain = map$3.call(_, number$2), clamp === identity$6 || (clamp = clamper(domain)), rescale()) : domain.slice();
   };
 
   scale.range = function(_) {
@@ -12197,7 +12423,7 @@ function transformer$1() {
   };
 
   scale.rangeRound = function(_) {
-    return range = slice$5.call(_), interpolate$$1 = interpolateRound, rescale();
+    return range = slice$5.call(_), interpolate = interpolateRound, rescale();
   };
 
   scale.clamp = function(_) {
@@ -12205,7 +12431,7 @@ function transformer$1() {
   };
 
   scale.interpolate = function(_) {
-    return arguments.length ? (interpolate$$1 = _, rescale()) : interpolate$$1;
+    return arguments.length ? (interpolate = _, rescale()) : interpolate;
   };
 
   scale.unknown = function(_) {
@@ -12327,7 +12553,7 @@ function identity$7(domain) {
   scale.invert = scale;
 
   scale.domain = scale.range = function(_) {
-    return arguments.length ? (domain = map$2.call(_, number$2), scale) : domain.slice();
+    return arguments.length ? (domain = map$3.call(_, number$2), scale) : domain.slice();
   };
 
   scale.unknown = function(_) {
@@ -12338,7 +12564,7 @@ function identity$7(domain) {
     return identity$7(domain).unknown(unknown);
   };
 
-  domain = arguments.length ? map$2.call(domain, number$2) : [0, 1];
+  domain = arguments.length ? map$3.call(domain, number$2) : [0, 1];
 
   return linearish(scale);
 }
@@ -12581,7 +12807,7 @@ function sqrt$1() {
   return pow$1.apply(null, arguments).exponent(0.5);
 }
 
-function quantile$$1() {
+function quantile() {
   var domain = [],
       range = [],
       thresholds = [],
@@ -12627,7 +12853,7 @@ function quantile$$1() {
   };
 
   scale.copy = function() {
-    return quantile$$1()
+    return quantile()
         .domain(domain)
         .range(range)
         .unknown(unknown);
@@ -12732,10 +12958,12 @@ var t0$1 = new Date,
 function newInterval(floori, offseti, count, field) {
 
   function interval(date) {
-    return floori(date = new Date(+date)), date;
+    return floori(date = arguments.length === 0 ? new Date : new Date(+date)), date;
   }
 
-  interval.floor = interval;
+  interval.floor = function(date) {
+    return floori(date = new Date(+date)), date;
+  };
 
   interval.ceil = function(date) {
     return floori(date = new Date(date - 1)), offseti(date, 1), floori(date), date;
@@ -13043,8 +13271,8 @@ function utcDate(d) {
   return new Date(Date.UTC(d.y, d.m, d.d, d.H, d.M, d.S, d.L));
 }
 
-function newYear(y) {
-  return {y: y, m: 0, d: 1, H: 0, M: 0, S: 0, L: 0};
+function newDate(y, m, d) {
+  return {y: y, m: m, d: d, H: 0, M: 0, S: 0, L: 0};
 }
 
 function formatLocale$1(locale) {
@@ -13084,6 +13312,7 @@ function formatLocale$1(locale) {
     "m": formatMonthNumber,
     "M": formatMinutes,
     "p": formatPeriod,
+    "q": formatQuarter,
     "Q": formatUnixTimestamp,
     "s": formatUnixTimestampSeconds,
     "S": formatSeconds,
@@ -13116,6 +13345,7 @@ function formatLocale$1(locale) {
     "m": formatUTCMonthNumber,
     "M": formatUTCMinutes,
     "p": formatUTCPeriod,
+    "q": formatUTCQuarter,
     "Q": formatUnixTimestamp,
     "s": formatUnixTimestampSeconds,
     "S": formatUTCSeconds,
@@ -13148,6 +13378,7 @@ function formatLocale$1(locale) {
     "m": parseMonthNumber,
     "M": parseMinutes,
     "p": parsePeriod,
+    "q": parseQuarter,
     "Q": parseUnixTimestamp,
     "s": parseUnixTimestampSeconds,
     "S": parseSeconds,
@@ -13200,33 +13431,40 @@ function formatLocale$1(locale) {
     };
   }
 
-  function newParse(specifier, newDate) {
+  function newParse(specifier, Z) {
     return function(string) {
-      var d = newYear(1900),
+      var d = newDate(1900, undefined, 1),
           i = parseSpecifier(d, specifier, string += "", 0),
-          week, day$$1;
+          week, day$1;
       if (i != string.length) return null;
 
       // If a UNIX timestamp is specified, return it.
       if ("Q" in d) return new Date(d.Q);
+      if ("s" in d) return new Date(d.s * 1000 + ("L" in d ? d.L : 0));
+
+      // If this is utcParse, never use the local timezone.
+      if (Z && !("Z" in d)) d.Z = 0;
 
       // The am-pm flag is 0 for AM, and 1 for PM.
       if ("p" in d) d.H = d.H % 12 + d.p * 12;
 
+      // If the month was not specified, inherit from the quarter.
+      if (d.m === undefined) d.m = "q" in d ? d.q : 0;
+
       // Convert day-of-week and week-of-year to day-of-year.
       if ("V" in d) {
         if (d.V < 1 || d.V > 53) return null;
         if (!("w" in d)) d.w = 1;
         if ("Z" in d) {
-          week = utcDate(newYear(d.y)), day$$1 = week.getUTCDay();
-          week = day$$1 > 4 || day$$1 === 0 ? utcMonday.ceil(week) : utcMonday(week);
+          week = utcDate(newDate(d.y, 0, 1)), day$1 = week.getUTCDay();
+          week = day$1 > 4 || day$1 === 0 ? utcMonday.ceil(week) : utcMonday(week);
           week = utcDay.offset(week, (d.V - 1) * 7);
           d.y = week.getUTCFullYear();
           d.m = week.getUTCMonth();
           d.d = week.getUTCDate() + (d.w + 6) % 7;
         } else {
-          week = newDate(newYear(d.y)), day$$1 = week.getDay();
-          week = day$$1 > 4 || day$$1 === 0 ? monday.ceil(week) : monday(week);
+          week = localDate(newDate(d.y, 0, 1)), day$1 = week.getDay();
+          week = day$1 > 4 || day$1 === 0 ? monday.ceil(week) : monday(week);
           week = day.offset(week, (d.V - 1) * 7);
           d.y = week.getFullYear();
           d.m = week.getMonth();
@@ -13234,9 +13472,9 @@ function formatLocale$1(locale) {
         }
       } else if ("W" in d || "U" in d) {
         if (!("w" in d)) d.w = "u" in d ? d.u % 7 : "W" in d ? 1 : 0;
-        day$$1 = "Z" in d ? utcDate(newYear(d.y)).getUTCDay() : newDate(newYear(d.y)).getDay();
+        day$1 = "Z" in d ? utcDate(newDate(d.y, 0, 1)).getUTCDay() : localDate(newDate(d.y, 0, 1)).getDay();
         d.m = 0;
-        d.d = "W" in d ? (d.w + 6) % 7 + d.W * 7 - (day$$1 + 5) % 7 : d.w + d.U * 7 - (day$$1 + 6) % 7;
+        d.d = "W" in d ? (d.w + 6) % 7 + d.W * 7 - (day$1 + 5) % 7 : d.w + d.U * 7 - (day$1 + 6) % 7;
       }
 
       // If a time zone is specified, all fields are interpreted as UTC and then
@@ -13248,7 +13486,7 @@ function formatLocale$1(locale) {
       }
 
       // Otherwise, all fields are in local time.
-      return newDate(d);
+      return localDate(d);
     };
   }
 
@@ -13331,6 +13569,10 @@ function formatLocale$1(locale) {
     return locale_periods[+(d.getHours() >= 12)];
   }
 
+  function formatQuarter(d) {
+    return 1 + ~~(d.getMonth() / 3);
+  }
+
   function formatUTCShortWeekday(d) {
     return locale_shortWeekdays[d.getUTCDay()];
   }
@@ -13351,6 +13593,10 @@ function formatLocale$1(locale) {
     return locale_periods[+(d.getUTCHours() >= 12)];
   }
 
+  function formatUTCQuarter(d) {
+    return 1 + ~~(d.getUTCMonth() / 3);
+  }
+
   return {
     format: function(specifier) {
       var f = newFormat(specifier += "", formats);
@@ -13358,7 +13604,7 @@ function formatLocale$1(locale) {
       return f;
     },
     parse: function(specifier) {
-      var p = newParse(specifier += "", localDate);
+      var p = newParse(specifier += "", false);
       p.toString = function() { return specifier; };
       return p;
     },
@@ -13368,7 +13614,7 @@ function formatLocale$1(locale) {
       return f;
     },
     utcParse: function(specifier) {
-      var p = newParse(specifier, utcDate);
+      var p = newParse(specifier += "", true);
       p.toString = function() { return specifier; };
       return p;
     }
@@ -13441,6 +13687,11 @@ function parseZone(d, string, i) {
   return n ? (d.Z = n[1] ? 0 : -(n[2] + (n[3] || "00")), i + n[0].length) : -1;
 }
 
+function parseQuarter(d, string, i) {
+  var n = numberRe.exec(string.slice(i, i + 1));
+  return n ? (d.q = n[0] * 3 - 3, i + n[0].length) : -1;
+}
+
 function parseMonthNumber(d, string, i) {
   var n = numberRe.exec(string.slice(i, i + 2));
   return n ? (d.m = n[0] - 1, i + n[0].length) : -1;
@@ -13493,7 +13744,7 @@ function parseUnixTimestamp(d, string, i) {
 
 function parseUnixTimestampSeconds(d, string, i) {
   var n = numberRe.exec(string.slice(i));
-  return n ? (d.Q = (+n[0]) * 1000, i + n[0].length) : -1;
+  return n ? (d.s = +n[0], i + n[0].length) : -1;
 }
 
 function formatDayOfMonth(d, p) {
@@ -13533,17 +13784,17 @@ function formatSeconds(d, p) {
 }
 
 function formatWeekdayNumberMonday(d) {
-  var day$$1 = d.getDay();
-  return day$$1 === 0 ? 7 : day$$1;
+  var day = d.getDay();
+  return day === 0 ? 7 : day;
 }
 
 function formatWeekNumberSunday(d, p) {
-  return pad$1(sunday.count(year(d), d), p, 2);
+  return pad$1(sunday.count(year(d) - 1, d), p, 2);
 }
 
 function formatWeekNumberISO(d, p) {
-  var day$$1 = d.getDay();
-  d = (day$$1 >= 4 || day$$1 === 0) ? thursday(d) : thursday.ceil(d);
+  var day = d.getDay();
+  d = (day >= 4 || day === 0) ? thursday(d) : thursday.ceil(d);
   return pad$1(thursday.count(year(d), d) + (year(d).getDay() === 4), p, 2);
 }
 
@@ -13552,7 +13803,7 @@ function formatWeekdayNumberSunday(d) {
 }
 
 function formatWeekNumberMonday(d, p) {
-  return pad$1(monday.count(year(d), d), p, 2);
+  return pad$1(monday.count(year(d) - 1, d), p, 2);
 }
 
 function formatYear$1(d, p) {
@@ -13612,12 +13863,12 @@ function formatUTCWeekdayNumberMonday(d) {
 }
 
 function formatUTCWeekNumberSunday(d, p) {
-  return pad$1(utcSunday.count(utcYear(d), d), p, 2);
+  return pad$1(utcSunday.count(utcYear(d) - 1, d), p, 2);
 }
 
 function formatUTCWeekNumberISO(d, p) {
-  var day$$1 = d.getUTCDay();
-  d = (day$$1 >= 4 || day$$1 === 0) ? utcThursday(d) : utcThursday.ceil(d);
+  var day = d.getUTCDay();
+  d = (day >= 4 || day === 0) ? utcThursday(d) : utcThursday.ceil(d);
   return pad$1(utcThursday.count(utcYear(d), d) + (utcYear(d).getUTCDay() === 4), p, 2);
 }
 
@@ -13626,7 +13877,7 @@ function formatUTCWeekdayNumberSunday(d) {
 }
 
 function formatUTCWeekNumberMonday(d, p) {
-  return pad$1(utcMonday.count(utcYear(d), d), p, 2);
+  return pad$1(utcMonday.count(utcYear(d) - 1, d), p, 2);
 }
 
 function formatUTCYear(d, p) {
@@ -13710,7 +13961,7 @@ function number$3(t) {
   return t instanceof Date ? +t : +new Date(+t);
 }
 
-function calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1, millisecond$$1, format) {
+function calendar(year, month, week, day, hour, minute, second, millisecond, format) {
   var scale = continuous(identity$6, identity$6),
       invert = scale.invert,
       domain = scale.domain;
@@ -13725,33 +13976,33 @@ function calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1
       formatYear = format("%Y");
 
   var tickIntervals = [
-    [second$$1,  1,      durationSecond$1],
-    [second$$1,  5,  5 * durationSecond$1],
-    [second$$1, 15, 15 * durationSecond$1],
-    [second$$1, 30, 30 * durationSecond$1],
-    [minute$$1,  1,      durationMinute$1],
-    [minute$$1,  5,  5 * durationMinute$1],
-    [minute$$1, 15, 15 * durationMinute$1],
-    [minute$$1, 30, 30 * durationMinute$1],
-    [  hour$$1,  1,      durationHour$1  ],
-    [  hour$$1,  3,  3 * durationHour$1  ],
-    [  hour$$1,  6,  6 * durationHour$1  ],
-    [  hour$$1, 12, 12 * durationHour$1  ],
-    [   day$$1,  1,      durationDay$1   ],
-    [   day$$1,  2,  2 * durationDay$1   ],
+    [second,  1,      durationSecond$1],
+    [second,  5,  5 * durationSecond$1],
+    [second, 15, 15 * durationSecond$1],
+    [second, 30, 30 * durationSecond$1],
+    [minute,  1,      durationMinute$1],
+    [minute,  5,  5 * durationMinute$1],
+    [minute, 15, 15 * durationMinute$1],
+    [minute, 30, 30 * durationMinute$1],
+    [  hour,  1,      durationHour$1  ],
+    [  hour,  3,  3 * durationHour$1  ],
+    [  hour,  6,  6 * durationHour$1  ],
+    [  hour, 12, 12 * durationHour$1  ],
+    [   day,  1,      durationDay$1   ],
+    [   day,  2,  2 * durationDay$1   ],
     [  week,  1,      durationWeek$1  ],
-    [ month$$1,  1,      durationMonth ],
-    [ month$$1,  3,  3 * durationMonth ],
-    [  year$$1,  1,      durationYear  ]
+    [ month,  1,      durationMonth ],
+    [ month,  3,  3 * durationMonth ],
+    [  year,  1,      durationYear  ]
   ];
 
   function tickFormat(date) {
-    return (second$$1(date) < date ? formatMillisecond
-        : minute$$1(date) < date ? formatSecond
-        : hour$$1(date) < date ? formatMinute
-        : day$$1(date) < date ? formatHour
-        : month$$1(date) < date ? (week(date) < date ? formatDay : formatWeek)
-        : year$$1(date) < date ? formatMonth
+    return (second(date) < date ? formatMillisecond
+        : minute(date) < date ? formatSecond
+        : hour(date) < date ? formatMinute
+        : day(date) < date ? formatHour
+        : month(date) < date ? (week(date) < date ? formatDay : formatWeek)
+        : year(date) < date ? formatMonth
         : formatYear)(date);
   }
 
@@ -13766,14 +14017,14 @@ function calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1
           i = bisector(function(i) { return i[2]; }).right(tickIntervals, target);
       if (i === tickIntervals.length) {
         step = tickStep(start / durationYear, stop / durationYear, interval);
-        interval = year$$1;
+        interval = year;
       } else if (i) {
         i = tickIntervals[target / tickIntervals[i - 1][2] < tickIntervals[i][2] / target ? i - 1 : i];
         step = i[1];
         interval = i[0];
       } else {
         step = Math.max(tickStep(start, stop, interval), 1);
-        interval = millisecond$$1;
+        interval = millisecond;
       }
     }
 
@@ -13785,7 +14036,7 @@ function calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1
   };
 
   scale.domain = function(_) {
-    return arguments.length ? domain(map$2.call(_, number$3)) : domain().map(date$1);
+    return arguments.length ? domain(map$3.call(_, number$3)) : domain().map(date$1);
   };
 
   scale.ticks = function(interval, step) {
@@ -13812,7 +14063,7 @@ function calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1
   };
 
   scale.copy = function() {
-    return copy(scale, calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1, millisecond$$1, format));
+    return copy(scale, calendar(year, month, week, day, hour, minute, second, millisecond, format));
   };
 
   return scale;
@@ -14050,6 +14301,8 @@ var Set2 = colors("66c2a5fc8d628da0cbe78ac3a6d854ffd92fe5c494b3b3b3");
 
 var Set3 = colors("8dd3c7ffffb3bebadafb807280b1d3fdb462b3de69fccde5d9d9d9bc80bdccebc5ffed6f");
 
+var Tableau10 = colors("4e79a7f28e2ce1575976b7b259a14fedc949af7aa1ff9da79c755fbab0ab");
+
 function ramp(scheme) {
   return rgbBasis(scheme[scheme.length - 1]);
 }
@@ -14396,6 +14649,15 @@ var scheme$q = new Array(3).concat(
 
 var Oranges = ramp(scheme$q);
 
+function cividis(t) {
+  t = Math.max(0, Math.min(1, t));
+  return "rgb("
+      + Math.max(0, Math.min(255, Math.round(-4.54 - t * (35.34 - t * (2381.73 - t * (6402.7 - t * (7024.72 - t * 2710.57))))))) + ", "
+      + Math.max(0, Math.min(255, Math.round(32.49 + t * (170.73 + t * (52.82 - t * (131.46 - t * (176.58 - t * 67.37))))))) + ", "
+      + Math.max(0, Math.min(255, Math.round(81.24 + t * (442.36 - t * (2482.43 - t * (6167.24 - t * (6614.94 - t * 2475.67)))))))
+      + ")";
+}
+
 var cubehelix$3 = cubehelixLong(cubehelix(300, 0.5, 0.0), cubehelix(-240, 0.5, 1.0));
 
 var warm = cubehelixLong(cubehelix(-100, 0.75, 0.35), cubehelix(80, 1.50, 0.8));
@@ -14426,6 +14688,15 @@ function sinebow(t) {
   return c$1 + "";
 }
 
+function turbo(t) {
+  t = Math.max(0, Math.min(1, t));
+  return "rgb("
+      + Math.max(0, Math.min(255, Math.round(34.61 + t * (1172.33 - t * (10793.56 - t * (33300.12 - t * (38394.49 - t * 14825.05))))))) + ", "
+      + Math.max(0, Math.min(255, Math.round(23.31 + t * (557.33 + t * (1225.33 - t * (3574.96 - t * (1073.77 + t * 707.56))))))) + ", "
+      + Math.max(0, Math.min(255, Math.round(27.2 + t * (3211.1 - t * (15327.97 - t * (27814 - t * (22569.18 - t * 6838.66)))))))
+      + ")";
+}
+
 function ramp$1(range) {
   var n = range.length;
   return function(t) {
@@ -14767,8 +15038,8 @@ function y$3(p) {
 }
 
 function line() {
-  var x$$1 = x$3,
-      y$$1 = y$3,
+  var x = x$3,
+      y = y$3,
       defined = constant$b(true),
       context = null,
       curve = curveLinear,
@@ -14788,18 +15059,18 @@ function line() {
         if (defined0 = !defined0) output.lineStart();
         else output.lineEnd();
       }
-      if (defined0) output.point(+x$$1(d, i, data), +y$$1(d, i, data));
+      if (defined0) output.point(+x(d, i, data), +y(d, i, data));
     }
 
     if (buffer) return output = null, buffer + "" || null;
   }
 
   line.x = function(_) {
-    return arguments.length ? (x$$1 = typeof _ === "function" ? _ : constant$b(+_), line) : x$$1;
+    return arguments.length ? (x = typeof _ === "function" ? _ : constant$b(+_), line) : x;
   };
 
   line.y = function(_) {
-    return arguments.length ? (y$$1 = typeof _ === "function" ? _ : constant$b(+_), line) : y$$1;
+    return arguments.length ? (y = typeof _ === "function" ? _ : constant$b(+_), line) : y;
   };
 
   line.defined = function(_) {
@@ -15099,14 +15370,14 @@ function linkTarget(d) {
 function link$2(curve) {
   var source = linkSource,
       target = linkTarget,
-      x$$1 = x$3,
-      y$$1 = y$3,
+      x = x$3,
+      y = y$3,
       context = null;
 
   function link() {
     var buffer, argv = slice$6.call(arguments), s = source.apply(this, argv), t = target.apply(this, argv);
     if (!context) context = buffer = path();
-    curve(context, +x$$1.apply(this, (argv[0] = s, argv)), +y$$1.apply(this, argv), +x$$1.apply(this, (argv[0] = t, argv)), +y$$1.apply(this, argv));
+    curve(context, +x.apply(this, (argv[0] = s, argv)), +y.apply(this, argv), +x.apply(this, (argv[0] = t, argv)), +y.apply(this, argv));
     if (buffer) return context = null, buffer + "" || null;
   }
 
@@ -15119,11 +15390,11 @@ function link$2(curve) {
   };
 
   link.x = function(_) {
-    return arguments.length ? (x$$1 = typeof _ === "function" ? _ : constant$b(+_), link) : x$$1;
+    return arguments.length ? (x = typeof _ === "function" ? _ : constant$b(+_), link) : x;
   };
 
   link.y = function(_) {
-    return arguments.length ? (y$$1 = typeof _ === "function" ? _ : constant$b(+_), link) : y$$1;
+    return arguments.length ? (y = typeof _ === "function" ? _ : constant$b(+_), link) : y;
   };
 
   link.context = function(_) {
@@ -15623,15 +15894,15 @@ CardinalClosed.prototype = {
 
 var cardinalClosed = (function custom(tension) {
 
-  function cardinal$$1(context) {
+  function cardinal(context) {
     return new CardinalClosed(context, tension);
   }
 
-  cardinal$$1.tension = function(tension) {
+  cardinal.tension = function(tension) {
     return custom(+tension);
   };
 
-  return cardinal$$1;
+  return cardinal;
 })(0);
 
 function CardinalOpen(context, tension) {
@@ -15671,15 +15942,15 @@ CardinalOpen.prototype = {
 
 var cardinalOpen = (function custom(tension) {
 
-  function cardinal$$1(context) {
+  function cardinal(context) {
     return new CardinalOpen(context, tension);
   }
 
-  cardinal$$1.tension = function(tension) {
+  cardinal.tension = function(tension) {
     return custom(+tension);
   };
 
-  return cardinal$$1;
+  return cardinal;
 })(0);
 
 function point$4(that, x, y) {
@@ -15828,15 +16099,15 @@ CatmullRomClosed.prototype = {
 
 var catmullRomClosed = (function custom(alpha) {
 
-  function catmullRom$$1(context) {
+  function catmullRom(context) {
     return alpha ? new CatmullRomClosed(context, alpha) : new CardinalClosed(context, 0);
   }
 
-  catmullRom$$1.alpha = function(alpha) {
+  catmullRom.alpha = function(alpha) {
     return custom(+alpha);
   };
 
-  return catmullRom$$1;
+  return catmullRom;
 })(0.5);
 
 function CatmullRomOpen(context, alpha) {
@@ -15888,15 +16159,15 @@ CatmullRomOpen.prototype = {
 
 var catmullRomOpen = (function custom(alpha) {
 
-  function catmullRom$$1(context) {
+  function catmullRom(context) {
     return alpha ? new CatmullRomOpen(context, alpha) : new CardinalOpen(context, 0);
   }
 
-  catmullRom$$1.alpha = function(alpha) {
+  catmullRom.alpha = function(alpha) {
     return custom(+alpha);
   };
 
-  return catmullRom$$1;
+  return catmullRom;
 })(0.5);
 
 function LinearClosed(context) {
@@ -16227,15 +16498,15 @@ function expand(series, order) {
 }
 
 function diverging$1(series, order) {
-  if (!((n = series.length) > 1)) return;
+  if (!((n = series.length) > 0)) return;
   for (var i, j = 0, d, dy, yp, yn, n, m = series[order[0]].length; j < m; ++j) {
     for (yp = yn = 0, i = 0; i < n; ++i) {
-      if ((dy = (d = series[order[i]][j])[1] - d[0]) >= 0) {
+      if ((dy = (d = series[order[i]][j])[1] - d[0]) > 0) {
         d[0] = yp, d[1] = yp += dy;
       } else if (dy < 0) {
         d[1] = yn, d[0] = yn += dy;
       } else {
-        d[0] = yp;
+        d[0] = 0, d[1] = dy;
       }
     }
   }
@@ -17271,13 +17542,13 @@ Diagram.prototype = {
 };
 
 function voronoi() {
-  var x$$1 = x$4,
-      y$$1 = y$4,
+  var x = x$4,
+      y = y$4,
       extent = null;
 
   function voronoi(data) {
     return new Diagram(data.map(function(d, i) {
-      var s = [Math.round(x$$1(d, i, data) / epsilon$4) * epsilon$4, Math.round(y$$1(d, i, data) / epsilon$4) * epsilon$4];
+      var s = [Math.round(x(d, i, data) / epsilon$4) * epsilon$4, Math.round(y(d, i, data) / epsilon$4) * epsilon$4];
       s.index = i;
       s.data = d;
       return s;
@@ -17297,11 +17568,11 @@ function voronoi() {
   };
 
   voronoi.x = function(_) {
-    return arguments.length ? (x$$1 = typeof _ === "function" ? _ : constant$c(+_), voronoi) : x$$1;
+    return arguments.length ? (x = typeof _ === "function" ? _ : constant$c(+_), voronoi) : x;
   };
 
   voronoi.y = function(_) {
-    return arguments.length ? (y$$1 = typeof _ === "function" ? _ : constant$c(+_), voronoi) : y$$1;
+    return arguments.length ? (y = typeof _ === "function" ? _ : constant$c(+_), voronoi) : y;
   };
 
   voronoi.extent = function(_) {
@@ -17375,7 +17646,8 @@ var identity$9 = new Transform(1, 0, 0);
 transform$1.prototype = Transform.prototype;
 
 function transform$1(node) {
-  return node.__zoom || identity$9;
+  while (!node.__zoom) if (!(node = node.parentNode)) return identity$9;
+  return node.__zoom;
 }
 
 function nopropagation$2() {
@@ -17389,20 +17661,20 @@ function noevent$2() {
 
 // Ignore right-click, since that should open the context menu.
 function defaultFilter$2() {
-  return !exports.event.button;
+  return !exports.event.ctrlKey && !exports.event.button;
 }
 
 function defaultExtent$1() {
-  var e = this, w, h;
+  var e = this;
   if (e instanceof SVGElement) {
     e = e.ownerSVGElement || e;
-    w = e.width.baseVal.value;
-    h = e.height.baseVal.value;
-  } else {
-    w = e.clientWidth;
-    h = e.clientHeight;
+    if (e.hasAttribute("viewBox")) {
+      e = e.viewBox.baseVal;
+      return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
+    }
+    return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
   }
-  return [[0, 0], [w, h]];
+  return [[0, 0], [e.clientWidth, e.clientHeight]];
 }
 
 function defaultTransform() {
@@ -17410,11 +17682,11 @@ function defaultTransform() {
 }
 
 function defaultWheelDelta() {
-  return -exports.event.deltaY * (exports.event.deltaMode ? 120 : 1) / 500;
+  return -exports.event.deltaY * (exports.event.deltaMode === 1 ? 0.05 : exports.event.deltaMode ? 1 : 0.002);
 }
 
-function defaultTouchable$1() {
-  return "ontouchstart" in this;
+function defaultTouchable$2() {
+  return navigator.maxTouchPoints || ("ontouchstart" in this);
 }
 
 function defaultConstrain(transform, extent, translateExtent) {
@@ -17433,12 +17705,11 @@ function zoom() {
       extent = defaultExtent$1,
       constrain = defaultConstrain,
       wheelDelta = defaultWheelDelta,
-      touchable = defaultTouchable$1,
+      touchable = defaultTouchable$2,
       scaleExtent = [0, Infinity],
       translateExtent = [[-Infinity, -Infinity], [Infinity, Infinity]],
       duration = 250,
       interpolate = interpolateZoom,
-      gestures = [],
       listeners = dispatch("start", "zoom", "end"),
       touchstarting,
       touchending,
@@ -17446,8 +17717,8 @@ function zoom() {
       wheelDelay = 150,
       clickDistance2 = 0;
 
-  function zoom(selection$$1) {
-    selection$$1
+  function zoom(selection) {
+    selection
         .property("__zoom", defaultTransform)
         .on("wheel.zoom", wheeled)
         .on("mousedown.zoom", mousedowned)
@@ -17460,13 +17731,13 @@ function zoom() {
         .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
   }
 
-  zoom.transform = function(collection, transform) {
-    var selection$$1 = collection.selection ? collection.selection() : collection;
-    selection$$1.property("__zoom", defaultTransform);
-    if (collection !== selection$$1) {
-      schedule(collection, transform);
+  zoom.transform = function(collection, transform, point) {
+    var selection = collection.selection ? collection.selection() : collection;
+    selection.property("__zoom", defaultTransform);
+    if (collection !== selection) {
+      schedule(collection, transform, point);
     } else {
-      selection$$1.interrupt().each(function() {
+      selection.interrupt().each(function() {
         gesture(this, arguments)
             .start()
             .zoom(null, typeof transform === "function" ? transform.apply(this, arguments) : transform)
@@ -17475,27 +17746,27 @@ function zoom() {
     }
   };
 
-  zoom.scaleBy = function(selection$$1, k) {
-    zoom.scaleTo(selection$$1, function() {
+  zoom.scaleBy = function(selection, k, p) {
+    zoom.scaleTo(selection, function() {
       var k0 = this.__zoom.k,
           k1 = typeof k === "function" ? k.apply(this, arguments) : k;
       return k0 * k1;
-    });
+    }, p);
   };
 
-  zoom.scaleTo = function(selection$$1, k) {
-    zoom.transform(selection$$1, function() {
+  zoom.scaleTo = function(selection, k, p) {
+    zoom.transform(selection, function() {
       var e = extent.apply(this, arguments),
           t0 = this.__zoom,
-          p0 = centroid(e),
+          p0 = p == null ? centroid(e) : typeof p === "function" ? p.apply(this, arguments) : p,
           p1 = t0.invert(p0),
           k1 = typeof k === "function" ? k.apply(this, arguments) : k;
       return constrain(translate(scale(t0, k1), p0, p1), e, translateExtent);
-    });
+    }, p);
   };
 
-  zoom.translateBy = function(selection$$1, x, y) {
-    zoom.transform(selection$$1, function() {
+  zoom.translateBy = function(selection, x, y) {
+    zoom.transform(selection, function() {
       return constrain(this.__zoom.translate(
         typeof x === "function" ? x.apply(this, arguments) : x,
         typeof y === "function" ? y.apply(this, arguments) : y
@@ -17503,16 +17774,16 @@ function zoom() {
     });
   };
 
-  zoom.translateTo = function(selection$$1, x, y) {
-    zoom.transform(selection$$1, function() {
+  zoom.translateTo = function(selection, x, y, p) {
+    zoom.transform(selection, function() {
       var e = extent.apply(this, arguments),
           t = this.__zoom,
-          p = centroid(e);
-      return constrain(identity$9.translate(p[0], p[1]).scale(t.k).translate(
+          p0 = p == null ? centroid(e) : typeof p === "function" ? p.apply(this, arguments) : p;
+      return constrain(identity$9.translate(p0[0], p0[1]).scale(t.k).translate(
         typeof x === "function" ? -x.apply(this, arguments) : -x,
         typeof y === "function" ? -y.apply(this, arguments) : -y
       ), e, translateExtent);
-    });
+    }, p);
   };
 
   function scale(transform, k) {
@@ -17529,8 +17800,8 @@ function zoom() {
     return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
   }
 
-  function schedule(transition$$1, transform, center) {
-    transition$$1
+  function schedule(transition, transform, point) {
+    transition
         .on("start.zoom", function() { gesture(this, arguments).start(); })
         .on("interrupt.zoom end.zoom", function() { gesture(this, arguments).end(); })
         .tween("zoom", function() {
@@ -17538,7 +17809,7 @@ function zoom() {
               args = arguments,
               g = gesture(that, args),
               e = extent.apply(that, args),
-              p = center || centroid(e),
+              p = point == null ? centroid(e) : typeof point === "function" ? point.apply(that, args) : point,
               w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
               a = that.__zoom,
               b = typeof transform === "function" ? transform.apply(that, args) : transform,
@@ -17551,27 +17822,22 @@ function zoom() {
         });
   }
 
-  function gesture(that, args) {
-    for (var i = 0, n = gestures.length, g; i < n; ++i) {
-      if ((g = gestures[i]).that === that) {
-        return g;
-      }
-    }
-    return new Gesture(that, args);
+  function gesture(that, args, clean) {
+    return (!clean && that.__zooming) || new Gesture(that, args);
   }
 
   function Gesture(that, args) {
     this.that = that;
     this.args = args;
-    this.index = -1;
     this.active = 0;
     this.extent = extent.apply(that, args);
+    this.taps = 0;
   }
 
   Gesture.prototype = {
     start: function() {
       if (++this.active === 1) {
-        this.index = gestures.push(this) - 1;
+        this.that.__zooming = this;
         this.emit("start");
       }
       return this;
@@ -17586,8 +17852,7 @@ function zoom() {
     },
     end: function() {
       if (--this.active === 0) {
-        gestures.splice(this.index, 1);
-        this.index = -1;
+        delete this.that.__zooming;
         this.emit("end");
       }
       return this;
@@ -17635,7 +17900,7 @@ function zoom() {
 
   function mousedowned() {
     if (touchending || !filter.apply(this, arguments)) return;
-    var g = gesture(this, arguments),
+    var g = gesture(this, arguments, true),
         v = select(exports.event.view).on("mousemove.zoom", mousemoved, true).on("mouseup.zoom", mouseupped, true),
         p = mouse(this),
         x0 = exports.event.clientX,
@@ -17679,46 +17944,39 @@ function zoom() {
 
   function touchstarted() {
     if (!filter.apply(this, arguments)) return;
-    var g = gesture(this, arguments),
-        touches$$1 = exports.event.changedTouches,
-        started,
-        n = touches$$1.length, i, t, p;
+    var touches = exports.event.touches,
+        n = touches.length,
+        g = gesture(this, arguments, exports.event.changedTouches.length === n),
+        started, i, t, p;
 
     nopropagation$2();
     for (i = 0; i < n; ++i) {
-      t = touches$$1[i], p = touch(this, touches$$1, t.identifier);
+      t = touches[i], p = touch(this, touches, t.identifier);
       p = [p, this.__zoom.invert(p), t.identifier];
-      if (!g.touch0) g.touch0 = p, started = true;
-      else if (!g.touch1) g.touch1 = p;
+      if (!g.touch0) g.touch0 = p, started = true, g.taps = 1 + !!touchstarting;
+      else if (!g.touch1 && g.touch0[2] !== p[2]) g.touch1 = p, g.taps = 0;
     }
 
-    // If this is a dbltap, reroute to the (optional) dblclick.zoom handler.
-    if (touchstarting) {
-      touchstarting = clearTimeout(touchstarting);
-      if (!g.touch1) {
-        g.end();
-        p = select(this).on("dblclick.zoom");
-        if (p) p.apply(this, arguments);
-        return;
-      }
-    }
+    if (touchstarting) touchstarting = clearTimeout(touchstarting);
 
     if (started) {
-      touchstarting = setTimeout(function() { touchstarting = null; }, touchDelay);
+      if (g.taps < 2) touchstarting = setTimeout(function() { touchstarting = null; }, touchDelay);
       interrupt(this);
       g.start();
     }
   }
 
   function touchmoved() {
+    if (!this.__zooming) return;
     var g = gesture(this, arguments),
-        touches$$1 = exports.event.changedTouches,
-        n = touches$$1.length, i, t, p, l;
+        touches = exports.event.changedTouches,
+        n = touches.length, i, t, p, l;
 
     noevent$2();
     if (touchstarting) touchstarting = clearTimeout(touchstarting);
+    g.taps = 0;
     for (i = 0; i < n; ++i) {
-      t = touches$$1[i], p = touch(this, touches$$1, t.identifier);
+      t = touches[i], p = touch(this, touches, t.identifier);
       if (g.touch0 && g.touch0[2] === t.identifier) g.touch0[0] = p;
       else if (g.touch1 && g.touch1[2] === t.identifier) g.touch1[0] = p;
     }
@@ -17738,21 +17996,29 @@ function zoom() {
   }
 
   function touchended() {
+    if (!this.__zooming) return;
     var g = gesture(this, arguments),
-        touches$$1 = exports.event.changedTouches,
-        n = touches$$1.length, i, t;
+        touches = exports.event.changedTouches,
+        n = touches.length, i, t;
 
     nopropagation$2();
     if (touchending) clearTimeout(touchending);
     touchending = setTimeout(function() { touchending = null; }, touchDelay);
     for (i = 0; i < n; ++i) {
-      t = touches$$1[i];
+      t = touches[i];
       if (g.touch0 && g.touch0[2] === t.identifier) delete g.touch0;
       else if (g.touch1 && g.touch1[2] === t.identifier) delete g.touch1;
     }
     if (g.touch1 && !g.touch0) g.touch0 = g.touch1, delete g.touch1;
     if (g.touch0) g.touch0[1] = this.__zoom.invert(g.touch0[0]);
-    else g.end();
+    else {
+      g.end();
+      // If this was a dbltap, reroute to the (optional) dblclick.zoom handler.
+      if (g.taps === 2) {
+        var p = select(this).on("dblclick.zoom");
+        if (p) p.apply(this, arguments);
+      }
+    }
   }
 
   zoom.wheelDelta = function(_) {
@@ -17803,128 +18069,111 @@ function zoom() {
   return zoom;
 }
 
-exports.version = version;
-exports.bisect = bisectRight;
-exports.bisectRight = bisectRight;
-exports.bisectLeft = bisectLeft;
+exports.FormatSpecifier = FormatSpecifier;
+exports.active = active;
+exports.arc = arc;
+exports.area = area$3;
+exports.areaRadial = areaRadial;
 exports.ascending = ascending;
-exports.bisector = bisector;
-exports.cross = cross;
-exports.descending = descending;
-exports.deviation = deviation;
-exports.extent = extent;
-exports.histogram = histogram;
-exports.thresholdFreedmanDiaconis = freedmanDiaconis;
-exports.thresholdScott = scott;
-exports.thresholdSturges = thresholdSturges;
-exports.max = max;
-exports.mean = mean;
-exports.median = median;
-exports.merge = merge;
-exports.min = min;
-exports.pairs = pairs;
-exports.permute = permute;
-exports.quantile = threshold;
-exports.range = sequence;
-exports.scan = scan;
-exports.shuffle = shuffle;
-exports.sum = sum;
-exports.ticks = ticks;
-exports.tickIncrement = tickIncrement;
-exports.tickStep = tickStep;
-exports.transpose = transpose;
-exports.variance = variance;
-exports.zip = zip;
-exports.axisTop = axisTop;
-exports.axisRight = axisRight;
+exports.autoType = autoType;
 exports.axisBottom = axisBottom;
 exports.axisLeft = axisLeft;
+exports.axisRight = axisRight;
+exports.axisTop = axisTop;
+exports.bisect = bisectRight;
+exports.bisectLeft = bisectLeft;
+exports.bisectRight = bisectRight;
+exports.bisector = bisector;
+exports.blob = blob;
 exports.brush = brush;
+exports.brushSelection = brushSelection;
 exports.brushX = brushX;
 exports.brushY = brushY;
-exports.brushSelection = brushSelection;
+exports.buffer = buffer;
 exports.chord = chord;
-exports.ribbon = ribbon;
-exports.nest = nest;
-exports.set = set$2;
-exports.map = map$1;
-exports.keys = keys;
-exports.values = values;
-exports.entries = entries;
+exports.clientPoint = point;
+exports.cluster = cluster;
 exports.color = color;
-exports.rgb = rgb;
-exports.hsl = hsl;
-exports.lab = lab;
-exports.hcl = hcl;
-exports.lch = lch;
-exports.gray = gray;
-exports.cubehelix = cubehelix;
-exports.contours = contours;
 exports.contourDensity = density;
+exports.contours = contours;
+exports.create = create;
+exports.creator = creator;
+exports.cross = cross;
+exports.csv = csv$1;
+exports.csvFormat = csvFormat;
+exports.csvFormatBody = csvFormatBody;
+exports.csvFormatRow = csvFormatRow;
+exports.csvFormatRows = csvFormatRows;
+exports.csvFormatValue = csvFormatValue;
+exports.csvParse = csvParse;
+exports.csvParseRows = csvParseRows;
+exports.cubehelix = cubehelix;
+exports.curveBasis = basis$2;
+exports.curveBasisClosed = basisClosed$1;
+exports.curveBasisOpen = basisOpen;
+exports.curveBundle = bundle;
+exports.curveCardinal = cardinal;
+exports.curveCardinalClosed = cardinalClosed;
+exports.curveCardinalOpen = cardinalOpen;
+exports.curveCatmullRom = catmullRom;
+exports.curveCatmullRomClosed = catmullRomClosed;
+exports.curveCatmullRomOpen = catmullRomOpen;
+exports.curveLinear = curveLinear;
+exports.curveLinearClosed = linearClosed;
+exports.curveMonotoneX = monotoneX;
+exports.curveMonotoneY = monotoneY;
+exports.curveNatural = natural;
+exports.curveStep = step;
+exports.curveStepAfter = stepAfter;
+exports.curveStepBefore = stepBefore;
+exports.customEvent = customEvent;
+exports.descending = descending;
+exports.deviation = deviation;
 exports.dispatch = dispatch;
 exports.drag = drag;
 exports.dragDisable = dragDisable;
 exports.dragEnable = yesdrag;
+exports.dsv = dsv;
 exports.dsvFormat = dsvFormat;
-exports.csvParse = csvParse;
-exports.csvParseRows = csvParseRows;
-exports.csvFormat = csvFormat;
-exports.csvFormatBody = csvFormatBody;
-exports.csvFormatRows = csvFormatRows;
-exports.tsvParse = tsvParse;
-exports.tsvParseRows = tsvParseRows;
-exports.tsvFormat = tsvFormat;
-exports.tsvFormatBody = tsvFormatBody;
-exports.tsvFormatRows = tsvFormatRows;
-exports.autoType = autoType;
-exports.easeLinear = linear$1;
-exports.easeQuad = quadInOut;
-exports.easeQuadIn = quadIn;
-exports.easeQuadOut = quadOut;
-exports.easeQuadInOut = quadInOut;
+exports.easeBack = backInOut;
+exports.easeBackIn = backIn;
+exports.easeBackInOut = backInOut;
+exports.easeBackOut = backOut;
+exports.easeBounce = bounceOut;
+exports.easeBounceIn = bounceIn;
+exports.easeBounceInOut = bounceInOut;
+exports.easeBounceOut = bounceOut;
+exports.easeCircle = circleInOut;
+exports.easeCircleIn = circleIn;
+exports.easeCircleInOut = circleInOut;
+exports.easeCircleOut = circleOut;
 exports.easeCubic = cubicInOut;
 exports.easeCubicIn = cubicIn;
-exports.easeCubicOut = cubicOut;
 exports.easeCubicInOut = cubicInOut;
+exports.easeCubicOut = cubicOut;
+exports.easeElastic = elasticOut;
+exports.easeElasticIn = elasticIn;
+exports.easeElasticInOut = elasticInOut;
+exports.easeElasticOut = elasticOut;
+exports.easeExp = expInOut;
+exports.easeExpIn = expIn;
+exports.easeExpInOut = expInOut;
+exports.easeExpOut = expOut;
+exports.easeLinear = linear$1;
 exports.easePoly = polyInOut;
 exports.easePolyIn = polyIn;
-exports.easePolyOut = polyOut;
 exports.easePolyInOut = polyInOut;
+exports.easePolyOut = polyOut;
+exports.easeQuad = quadInOut;
+exports.easeQuadIn = quadIn;
+exports.easeQuadInOut = quadInOut;
+exports.easeQuadOut = quadOut;
 exports.easeSin = sinInOut;
 exports.easeSinIn = sinIn;
-exports.easeSinOut = sinOut;
 exports.easeSinInOut = sinInOut;
-exports.easeExp = expInOut;
-exports.easeExpIn = expIn;
-exports.easeExpOut = expOut;
-exports.easeExpInOut = expInOut;
-exports.easeCircle = circleInOut;
-exports.easeCircleIn = circleIn;
-exports.easeCircleOut = circleOut;
-exports.easeCircleInOut = circleInOut;
-exports.easeBounce = bounceOut;
-exports.easeBounceIn = bounceIn;
-exports.easeBounceOut = bounceOut;
-exports.easeBounceInOut = bounceInOut;
-exports.easeBack = backInOut;
-exports.easeBackIn = backIn;
-exports.easeBackOut = backOut;
-exports.easeBackInOut = backInOut;
-exports.easeElastic = elasticOut;
-exports.easeElasticIn = elasticIn;
-exports.easeElasticOut = elasticOut;
-exports.easeElasticInOut = elasticInOut;
-exports.blob = blob;
-exports.buffer = buffer;
-exports.dsv = dsv;
-exports.csv = csv$1;
-exports.tsv = tsv$1;
-exports.image = image;
-exports.json = json;
-exports.text = text;
-exports.xml = xml;
-exports.html = html;
-exports.svg = svg;
+exports.easeSinOut = sinOut;
+exports.entries = entries;
+exports.extent = extent;
 exports.forceCenter = center$1;
 exports.forceCollide = collide;
 exports.forceLink = link;
@@ -17936,10 +18185,13 @@ exports.forceY = y$2;
 exports.formatDefaultLocale = defaultLocale;
 exports.formatLocale = formatLocale;
 exports.formatSpecifier = formatSpecifier;
-exports.precisionFixed = precisionFixed;
-exports.precisionPrefix = precisionPrefix;
-exports.precisionRound = precisionRound;
+exports.geoAlbers = albers;
+exports.geoAlbersUsa = albersUsa;
 exports.geoArea = area$1;
+exports.geoAzimuthalEqualArea = azimuthalEqualArea;
+exports.geoAzimuthalEqualAreaRaw = azimuthalEqualAreaRaw;
+exports.geoAzimuthalEquidistant = azimuthalEquidistant;
+exports.geoAzimuthalEquidistantRaw = azimuthalEquidistantRaw;
 exports.geoBounds = bounds;
 exports.geoCentroid = centroid;
 exports.geoCircle = circle;
@@ -17947,260 +18199,243 @@ exports.geoClipAntimeridian = clipAntimeridian;
 exports.geoClipCircle = clipCircle;
 exports.geoClipExtent = extent$1;
 exports.geoClipRectangle = clipRectangle;
-exports.geoContains = contains$1;
-exports.geoDistance = distance;
-exports.geoGraticule = graticule;
-exports.geoGraticule10 = graticule10;
-exports.geoInterpolate = interpolate$1;
-exports.geoLength = length$1;
-exports.geoPath = index$1;
-exports.geoAlbers = albers;
-exports.geoAlbersUsa = albersUsa;
-exports.geoAzimuthalEqualArea = azimuthalEqualArea;
-exports.geoAzimuthalEqualAreaRaw = azimuthalEqualAreaRaw;
-exports.geoAzimuthalEquidistant = azimuthalEquidistant;
-exports.geoAzimuthalEquidistantRaw = azimuthalEquidistantRaw;
 exports.geoConicConformal = conicConformal;
 exports.geoConicConformalRaw = conicConformalRaw;
 exports.geoConicEqualArea = conicEqualArea;
 exports.geoConicEqualAreaRaw = conicEqualAreaRaw;
 exports.geoConicEquidistant = conicEquidistant;
 exports.geoConicEquidistantRaw = conicEquidistantRaw;
+exports.geoContains = contains$1;
+exports.geoDistance = distance;
 exports.geoEqualEarth = equalEarth;
 exports.geoEqualEarthRaw = equalEarthRaw;
 exports.geoEquirectangular = equirectangular;
 exports.geoEquirectangularRaw = equirectangularRaw;
 exports.geoGnomonic = gnomonic;
 exports.geoGnomonicRaw = gnomonicRaw;
+exports.geoGraticule = graticule;
+exports.geoGraticule10 = graticule10;
 exports.geoIdentity = identity$5;
-exports.geoProjection = projection;
-exports.geoProjectionMutator = projectionMutator;
+exports.geoInterpolate = interpolate$1;
+exports.geoLength = length$1;
 exports.geoMercator = mercator;
 exports.geoMercatorRaw = mercatorRaw;
 exports.geoNaturalEarth1 = naturalEarth1;
 exports.geoNaturalEarth1Raw = naturalEarth1Raw;
 exports.geoOrthographic = orthographic;
 exports.geoOrthographicRaw = orthographicRaw;
+exports.geoPath = index$1;
+exports.geoProjection = projection;
+exports.geoProjectionMutator = projectionMutator;
+exports.geoRotation = rotation;
 exports.geoStereographic = stereographic;
 exports.geoStereographicRaw = stereographicRaw;
-exports.geoTransverseMercator = transverseMercator;
-exports.geoTransverseMercatorRaw = transverseMercatorRaw;
-exports.geoRotation = rotation;
 exports.geoStream = geoStream;
 exports.geoTransform = transform;
-exports.cluster = cluster;
+exports.geoTransverseMercator = transverseMercator;
+exports.geoTransverseMercatorRaw = transverseMercatorRaw;
+exports.gray = gray;
+exports.hcl = hcl;
 exports.hierarchy = hierarchy;
-exports.pack = index$2;
-exports.packSiblings = siblings;
-exports.packEnclose = enclose;
-exports.partition = partition;
-exports.stratify = stratify;
-exports.tree = tree;
-exports.treemap = index$3;
-exports.treemapBinary = binary;
-exports.treemapDice = treemapDice;
-exports.treemapSlice = treemapSlice;
-exports.treemapSliceDice = sliceDice;
-exports.treemapSquarify = squarify;
-exports.treemapResquarify = resquarify;
+exports.histogram = histogram;
+exports.hsl = hsl;
+exports.html = html;
+exports.image = image;
 exports.interpolate = interpolateValue;
 exports.interpolateArray = array$1;
 exports.interpolateBasis = basis$1;
 exports.interpolateBasisClosed = basisClosed;
+exports.interpolateBlues = Blues;
+exports.interpolateBrBG = BrBG;
+exports.interpolateBuGn = BuGn;
+exports.interpolateBuPu = BuPu;
+exports.interpolateCividis = cividis;
+exports.interpolateCool = cool;
+exports.interpolateCubehelix = cubehelix$2;
+exports.interpolateCubehelixDefault = cubehelix$3;
+exports.interpolateCubehelixLong = cubehelixLong;
 exports.interpolateDate = date;
 exports.interpolateDiscrete = discrete;
+exports.interpolateGnBu = GnBu;
+exports.interpolateGreens = Greens;
+exports.interpolateGreys = Greys;
+exports.interpolateHcl = hcl$2;
+exports.interpolateHclLong = hclLong;
+exports.interpolateHsl = hsl$2;
+exports.interpolateHslLong = hslLong;
 exports.interpolateHue = hue$1;
+exports.interpolateInferno = inferno;
+exports.interpolateLab = lab$1;
+exports.interpolateMagma = magma;
 exports.interpolateNumber = interpolateNumber;
+exports.interpolateNumberArray = numberArray;
 exports.interpolateObject = object;
+exports.interpolateOrRd = OrRd;
+exports.interpolateOranges = Oranges;
+exports.interpolatePRGn = PRGn;
+exports.interpolatePiYG = PiYG;
+exports.interpolatePlasma = plasma;
+exports.interpolatePuBu = PuBu;
+exports.interpolatePuBuGn = PuBuGn;
+exports.interpolatePuOr = PuOr;
+exports.interpolatePuRd = PuRd;
+exports.interpolatePurples = Purples;
+exports.interpolateRainbow = rainbow;
+exports.interpolateRdBu = RdBu;
+exports.interpolateRdGy = RdGy;
+exports.interpolateRdPu = RdPu;
+exports.interpolateRdYlBu = RdYlBu;
+exports.interpolateRdYlGn = RdYlGn;
+exports.interpolateReds = Reds;
+exports.interpolateRgb = interpolateRgb;
+exports.interpolateRgbBasis = rgbBasis;
+exports.interpolateRgbBasisClosed = rgbBasisClosed;
 exports.interpolateRound = interpolateRound;
+exports.interpolateSinebow = sinebow;
+exports.interpolateSpectral = Spectral;
 exports.interpolateString = interpolateString;
 exports.interpolateTransformCss = interpolateTransformCss;
 exports.interpolateTransformSvg = interpolateTransformSvg;
+exports.interpolateTurbo = turbo;
+exports.interpolateViridis = viridis;
+exports.interpolateWarm = warm;
+exports.interpolateYlGn = YlGn;
+exports.interpolateYlGnBu = YlGnBu;
+exports.interpolateYlOrBr = YlOrBr;
+exports.interpolateYlOrRd = YlOrRd;
 exports.interpolateZoom = interpolateZoom;
-exports.interpolateRgb = interpolateRgb;
-exports.interpolateRgbBasis = rgbBasis;
-exports.interpolateRgbBasisClosed = rgbBasisClosed;
-exports.interpolateHsl = hsl$2;
-exports.interpolateHslLong = hslLong;
-exports.interpolateLab = lab$1;
-exports.interpolateHcl = hcl$2;
-exports.interpolateHclLong = hclLong;
-exports.interpolateCubehelix = cubehelix$2;
-exports.interpolateCubehelixLong = cubehelixLong;
-exports.piecewise = piecewise;
-exports.quantize = quantize;
-exports.path = path;
-exports.polygonArea = area$2;
-exports.polygonCentroid = centroid$1;
-exports.polygonHull = hull;
-exports.polygonContains = contains$2;
-exports.polygonLength = length$2;
-exports.quadtree = quadtree;
-exports.randomUniform = uniform;
-exports.randomNormal = normal;
-exports.randomLogNormal = logNormal;
+exports.interrupt = interrupt;
+exports.interval = interval$1;
+exports.isoFormat = formatIso;
+exports.isoParse = parseIso;
+exports.json = json;
+exports.keys = keys;
+exports.lab = lab;
+exports.lch = lch;
+exports.line = line;
+exports.lineRadial = lineRadial$1;
+exports.linkHorizontal = linkHorizontal;
+exports.linkRadial = linkRadial;
+exports.linkVertical = linkVertical;
+exports.local = local;
+exports.map = map$1;
+exports.matcher = matcher;
+exports.max = max;
+exports.mean = mean;
+exports.median = median;
+exports.merge = merge;
+exports.min = min;
+exports.mouse = mouse;
+exports.namespace = namespace;
+exports.namespaces = namespaces;
+exports.nest = nest;
+exports.now = now;
+exports.pack = index$2;
+exports.packEnclose = enclose;
+exports.packSiblings = siblings;
+exports.pairs = pairs;
+exports.partition = partition;
+exports.path = path;
+exports.permute = permute;
+exports.pie = pie;
+exports.piecewise = piecewise;
+exports.pointRadial = pointRadial;
+exports.polygonArea = area$2;
+exports.polygonCentroid = centroid$1;
+exports.polygonContains = contains$2;
+exports.polygonHull = hull;
+exports.polygonLength = length$2;
+exports.precisionFixed = precisionFixed;
+exports.precisionPrefix = precisionPrefix;
+exports.precisionRound = precisionRound;
+exports.quadtree = quadtree;
+exports.quantile = threshold;
+exports.quantize = quantize;
+exports.radialArea = areaRadial;
+exports.radialLine = lineRadial$1;
 exports.randomBates = bates;
-exports.randomIrwinHall = irwinHall;
 exports.randomExponential = exponential$1;
+exports.randomIrwinHall = irwinHall;
+exports.randomLogNormal = logNormal;
+exports.randomNormal = normal;
+exports.randomUniform = uniform;
+exports.range = sequence;
+exports.rgb = rgb;
+exports.ribbon = ribbon;
 exports.scaleBand = band;
-exports.scalePoint = point$1;
+exports.scaleDiverging = diverging;
+exports.scaleDivergingLog = divergingLog;
+exports.scaleDivergingPow = divergingPow;
+exports.scaleDivergingSqrt = divergingSqrt;
+exports.scaleDivergingSymlog = divergingSymlog;
 exports.scaleIdentity = identity$7;
+exports.scaleImplicit = implicit;
 exports.scaleLinear = linear$2;
 exports.scaleLog = log$1;
-exports.scaleSymlog = symlog;
 exports.scaleOrdinal = ordinal;
-exports.scaleImplicit = implicit;
+exports.scalePoint = point$1;
 exports.scalePow = pow$1;
-exports.scaleSqrt = sqrt$1;
-exports.scaleQuantile = quantile$$1;
+exports.scaleQuantile = quantile;
 exports.scaleQuantize = quantize$1;
-exports.scaleThreshold = threshold$1;
-exports.scaleTime = time;
-exports.scaleUtc = utcTime;
 exports.scaleSequential = sequential;
 exports.scaleSequentialLog = sequentialLog;
 exports.scaleSequentialPow = sequentialPow;
+exports.scaleSequentialQuantile = sequentialQuantile;
 exports.scaleSequentialSqrt = sequentialSqrt;
 exports.scaleSequentialSymlog = sequentialSymlog;
-exports.scaleSequentialQuantile = sequentialQuantile;
-exports.scaleDiverging = diverging;
-exports.scaleDivergingLog = divergingLog;
-exports.scaleDivergingPow = divergingPow;
-exports.scaleDivergingSqrt = divergingSqrt;
-exports.scaleDivergingSymlog = divergingSymlog;
-exports.tickFormat = tickFormat;
-exports.schemeCategory10 = category10;
+exports.scaleSqrt = sqrt$1;
+exports.scaleSymlog = symlog;
+exports.scaleThreshold = threshold$1;
+exports.scaleTime = time;
+exports.scaleUtc = utcTime;
+exports.scan = scan;
 exports.schemeAccent = Accent;
+exports.schemeBlues = scheme$l;
+exports.schemeBrBG = scheme;
+exports.schemeBuGn = scheme$9;
+exports.schemeBuPu = scheme$a;
+exports.schemeCategory10 = category10;
 exports.schemeDark2 = Dark2;
+exports.schemeGnBu = scheme$b;
+exports.schemeGreens = scheme$m;
+exports.schemeGreys = scheme$n;
+exports.schemeOrRd = scheme$c;
+exports.schemeOranges = scheme$q;
+exports.schemePRGn = scheme$1;
 exports.schemePaired = Paired;
 exports.schemePastel1 = Pastel1;
 exports.schemePastel2 = Pastel2;
-exports.schemeSet1 = Set1;
-exports.schemeSet2 = Set2;
-exports.schemeSet3 = Set3;
-exports.interpolateBrBG = BrBG;
-exports.schemeBrBG = scheme;
-exports.interpolatePRGn = PRGn;
-exports.schemePRGn = scheme$1;
-exports.interpolatePiYG = PiYG;
 exports.schemePiYG = scheme$2;
-exports.interpolatePuOr = PuOr;
+exports.schemePuBu = scheme$e;
+exports.schemePuBuGn = scheme$d;
 exports.schemePuOr = scheme$3;
-exports.interpolateRdBu = RdBu;
+exports.schemePuRd = scheme$f;
+exports.schemePurples = scheme$o;
 exports.schemeRdBu = scheme$4;
-exports.interpolateRdGy = RdGy;
 exports.schemeRdGy = scheme$5;
-exports.interpolateRdYlBu = RdYlBu;
+exports.schemeRdPu = scheme$g;
 exports.schemeRdYlBu = scheme$6;
-exports.interpolateRdYlGn = RdYlGn;
 exports.schemeRdYlGn = scheme$7;
-exports.interpolateSpectral = Spectral;
+exports.schemeReds = scheme$p;
+exports.schemeSet1 = Set1;
+exports.schemeSet2 = Set2;
+exports.schemeSet3 = Set3;
 exports.schemeSpectral = scheme$8;
-exports.interpolateBuGn = BuGn;
-exports.schemeBuGn = scheme$9;
-exports.interpolateBuPu = BuPu;
-exports.schemeBuPu = scheme$a;
-exports.interpolateGnBu = GnBu;
-exports.schemeGnBu = scheme$b;
-exports.interpolateOrRd = OrRd;
-exports.schemeOrRd = scheme$c;
-exports.interpolatePuBuGn = PuBuGn;
-exports.schemePuBuGn = scheme$d;
-exports.interpolatePuBu = PuBu;
-exports.schemePuBu = scheme$e;
-exports.interpolatePuRd = PuRd;
-exports.schemePuRd = scheme$f;
-exports.interpolateRdPu = RdPu;
-exports.schemeRdPu = scheme$g;
-exports.interpolateYlGnBu = YlGnBu;
-exports.schemeYlGnBu = scheme$h;
-exports.interpolateYlGn = YlGn;
+exports.schemeTableau10 = Tableau10;
 exports.schemeYlGn = scheme$i;
-exports.interpolateYlOrBr = YlOrBr;
+exports.schemeYlGnBu = scheme$h;
 exports.schemeYlOrBr = scheme$j;
-exports.interpolateYlOrRd = YlOrRd;
 exports.schemeYlOrRd = scheme$k;
-exports.interpolateBlues = Blues;
-exports.schemeBlues = scheme$l;
-exports.interpolateGreens = Greens;
-exports.schemeGreens = scheme$m;
-exports.interpolateGreys = Greys;
-exports.schemeGreys = scheme$n;
-exports.interpolatePurples = Purples;
-exports.schemePurples = scheme$o;
-exports.interpolateReds = Reds;
-exports.schemeReds = scheme$p;
-exports.interpolateOranges = Oranges;
-exports.schemeOranges = scheme$q;
-exports.interpolateCubehelixDefault = cubehelix$3;
-exports.interpolateRainbow = rainbow;
-exports.interpolateWarm = warm;
-exports.interpolateCool = cool;
-exports.interpolateSinebow = sinebow;
-exports.interpolateViridis = viridis;
-exports.interpolateMagma = magma;
-exports.interpolateInferno = inferno;
-exports.interpolatePlasma = plasma;
-exports.create = create;
-exports.creator = creator;
-exports.local = local;
-exports.matcher = matcher;
-exports.mouse = mouse;
-exports.namespace = namespace;
-exports.namespaces = namespaces;
-exports.clientPoint = point;
 exports.select = select;
 exports.selectAll = selectAll;
 exports.selection = selection;
 exports.selector = selector;
 exports.selectorAll = selectorAll;
-exports.style = styleValue;
-exports.touch = touch;
-exports.touches = touches;
-exports.window = defaultView;
-exports.customEvent = customEvent;
-exports.arc = arc;
-exports.area = area$3;
-exports.line = line;
-exports.pie = pie;
-exports.areaRadial = areaRadial;
-exports.radialArea = areaRadial;
-exports.lineRadial = lineRadial$1;
-exports.radialLine = lineRadial$1;
-exports.pointRadial = pointRadial;
-exports.linkHorizontal = linkHorizontal;
-exports.linkVertical = linkVertical;
-exports.linkRadial = linkRadial;
-exports.symbol = symbol;
-exports.symbols = symbols;
-exports.symbolCircle = circle$2;
-exports.symbolCross = cross$2;
-exports.symbolDiamond = diamond;
-exports.symbolSquare = square;
-exports.symbolStar = star;
-exports.symbolTriangle = triangle;
-exports.symbolWye = wye;
-exports.curveBasisClosed = basisClosed$1;
-exports.curveBasisOpen = basisOpen;
-exports.curveBasis = basis$2;
-exports.curveBundle = bundle;
-exports.curveCardinalClosed = cardinalClosed;
-exports.curveCardinalOpen = cardinalOpen;
-exports.curveCardinal = cardinal;
-exports.curveCatmullRomClosed = catmullRomClosed;
-exports.curveCatmullRomOpen = catmullRomOpen;
-exports.curveCatmullRom = catmullRom;
-exports.curveLinearClosed = linearClosed;
-exports.curveLinear = curveLinear;
-exports.curveMonotoneX = monotoneX;
-exports.curveMonotoneY = monotoneY;
-exports.curveNatural = natural;
-exports.curveStep = step;
-exports.curveStepAfter = stepAfter;
-exports.curveStepBefore = stepBefore;
+exports.set = set$2;
+exports.shuffle = shuffle;
 exports.stack = stack;
-exports.stackOffsetExpand = expand;
 exports.stackOffsetDiverging = diverging$1;
+exports.stackOffsetExpand = expand;
 exports.stackOffsetNone = none$1;
 exports.stackOffsetSilhouette = silhouette;
 exports.stackOffsetWiggle = wiggle;
@@ -18210,84 +18445,124 @@ exports.stackOrderDescending = descending$2;
 exports.stackOrderInsideOut = insideOut;
 exports.stackOrderNone = none$2;
 exports.stackOrderReverse = reverse;
+exports.stratify = stratify;
+exports.style = styleValue;
+exports.sum = sum;
+exports.svg = svg;
+exports.symbol = symbol;
+exports.symbolCircle = circle$2;
+exports.symbolCross = cross$2;
+exports.symbolDiamond = diamond;
+exports.symbolSquare = square;
+exports.symbolStar = star;
+exports.symbolTriangle = triangle;
+exports.symbolWye = wye;
+exports.symbols = symbols;
+exports.text = text;
+exports.thresholdFreedmanDiaconis = freedmanDiaconis;
+exports.thresholdScott = scott;
+exports.thresholdSturges = thresholdSturges;
+exports.tickFormat = tickFormat;
+exports.tickIncrement = tickIncrement;
+exports.tickStep = tickStep;
+exports.ticks = ticks;
+exports.timeDay = day;
+exports.timeDays = days;
+exports.timeFormatDefaultLocale = defaultLocale$1;
+exports.timeFormatLocale = formatLocale$1;
+exports.timeFriday = friday;
+exports.timeFridays = fridays;
+exports.timeHour = hour;
+exports.timeHours = hours;
 exports.timeInterval = newInterval;
 exports.timeMillisecond = millisecond;
 exports.timeMilliseconds = milliseconds;
-exports.utcMillisecond = millisecond;
-exports.utcMilliseconds = milliseconds;
-exports.timeSecond = second;
-exports.timeSeconds = seconds;
-exports.utcSecond = second;
-exports.utcSeconds = seconds;
 exports.timeMinute = minute;
 exports.timeMinutes = minutes;
-exports.timeHour = hour;
-exports.timeHours = hours;
-exports.timeDay = day;
-exports.timeDays = days;
-exports.timeWeek = sunday;
-exports.timeWeeks = sundays;
-exports.timeSunday = sunday;
-exports.timeSundays = sundays;
 exports.timeMonday = monday;
 exports.timeMondays = mondays;
+exports.timeMonth = month;
+exports.timeMonths = months;
+exports.timeSaturday = saturday;
+exports.timeSaturdays = saturdays;
+exports.timeSecond = second;
+exports.timeSeconds = seconds;
+exports.timeSunday = sunday;
+exports.timeSundays = sundays;
+exports.timeThursday = thursday;
+exports.timeThursdays = thursdays;
 exports.timeTuesday = tuesday;
 exports.timeTuesdays = tuesdays;
 exports.timeWednesday = wednesday;
 exports.timeWednesdays = wednesdays;
-exports.timeThursday = thursday;
-exports.timeThursdays = thursdays;
-exports.timeFriday = friday;
-exports.timeFridays = fridays;
-exports.timeSaturday = saturday;
-exports.timeSaturdays = saturdays;
-exports.timeMonth = month;
-exports.timeMonths = months;
+exports.timeWeek = sunday;
+exports.timeWeeks = sundays;
 exports.timeYear = year;
 exports.timeYears = years;
-exports.utcMinute = utcMinute;
-exports.utcMinutes = utcMinutes;
-exports.utcHour = utcHour;
-exports.utcHours = utcHours;
+exports.timeout = timeout$1;
+exports.timer = timer;
+exports.timerFlush = timerFlush;
+exports.touch = touch;
+exports.touches = touches;
+exports.transition = transition;
+exports.transpose = transpose;
+exports.tree = tree;
+exports.treemap = index$3;
+exports.treemapBinary = binary;
+exports.treemapDice = treemapDice;
+exports.treemapResquarify = resquarify;
+exports.treemapSlice = treemapSlice;
+exports.treemapSliceDice = sliceDice;
+exports.treemapSquarify = squarify;
+exports.tsv = tsv$1;
+exports.tsvFormat = tsvFormat;
+exports.tsvFormatBody = tsvFormatBody;
+exports.tsvFormatRow = tsvFormatRow;
+exports.tsvFormatRows = tsvFormatRows;
+exports.tsvFormatValue = tsvFormatValue;
+exports.tsvParse = tsvParse;
+exports.tsvParseRows = tsvParseRows;
 exports.utcDay = utcDay;
 exports.utcDays = utcDays;
-exports.utcWeek = utcSunday;
-exports.utcWeeks = utcSundays;
-exports.utcSunday = utcSunday;
-exports.utcSundays = utcSundays;
+exports.utcFriday = utcFriday;
+exports.utcFridays = utcFridays;
+exports.utcHour = utcHour;
+exports.utcHours = utcHours;
+exports.utcMillisecond = millisecond;
+exports.utcMilliseconds = milliseconds;
+exports.utcMinute = utcMinute;
+exports.utcMinutes = utcMinutes;
 exports.utcMonday = utcMonday;
 exports.utcMondays = utcMondays;
+exports.utcMonth = utcMonth;
+exports.utcMonths = utcMonths;
+exports.utcSaturday = utcSaturday;
+exports.utcSaturdays = utcSaturdays;
+exports.utcSecond = second;
+exports.utcSeconds = seconds;
+exports.utcSunday = utcSunday;
+exports.utcSundays = utcSundays;
+exports.utcThursday = utcThursday;
+exports.utcThursdays = utcThursdays;
 exports.utcTuesday = utcTuesday;
 exports.utcTuesdays = utcTuesdays;
 exports.utcWednesday = utcWednesday;
 exports.utcWednesdays = utcWednesdays;
-exports.utcThursday = utcThursday;
-exports.utcThursdays = utcThursdays;
-exports.utcFriday = utcFriday;
-exports.utcFridays = utcFridays;
-exports.utcSaturday = utcSaturday;
-exports.utcSaturdays = utcSaturdays;
-exports.utcMonth = utcMonth;
-exports.utcMonths = utcMonths;
+exports.utcWeek = utcSunday;
+exports.utcWeeks = utcSundays;
 exports.utcYear = utcYear;
 exports.utcYears = utcYears;
-exports.timeFormatDefaultLocale = defaultLocale$1;
-exports.timeFormatLocale = formatLocale$1;
-exports.isoFormat = formatIso;
-exports.isoParse = parseIso;
-exports.now = now;
-exports.timer = timer;
-exports.timerFlush = timerFlush;
-exports.timeout = timeout$1;
-exports.interval = interval$1;
-exports.transition = transition;
-exports.active = active;
-exports.interrupt = interrupt;
+exports.values = values;
+exports.variance = variance;
+exports.version = version;
 exports.voronoi = voronoi;
+exports.window = defaultView;
+exports.xml = xml;
+exports.zip = zip;
 exports.zoom = zoom;
-exports.zoomTransform = transform$1;
 exports.zoomIdentity = identity$9;
+exports.zoomTransform = transform$1;
 
 Object.defineProperty(exports, '__esModule', { value: true });
 
-})));
+}));
diff --git a/app/assets/javascripts/d3.v5.min.js b/app/assets/javascripts/d3.v5.min.js
index 6b882ae..344d26c 100644
--- a/app/assets/javascripts/d3.v5.min.js
+++ b/app/assets/javascripts/d3.v5.min.js
@@ -1,2 +1,2 @@
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diff --git a/lib/d3/rails/version.rb b/lib/d3/rails/version.rb
index 95dd0fb..dfcdf82 100644
--- a/lib/d3/rails/version.rb
+++ b/lib/d3/rails/version.rb
@@ -1,5 +1,5 @@
 module D3
   module Rails
-    VERSION = "5.9.2"
+    VERSION = "5.16.0"
   end
 end