From 76a6e8282456dd281fd0385fa2615ccc48dd5057 Mon Sep 17 00:00:00 2001
From: Andrew Huang <ahuang@anaconda.com>
Date: Wed, 13 Sep 2023 21:47:31 -0700
Subject: [PATCH 1/2] Add alpha dimension

---
 geoviews/util.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/geoviews/util.py b/geoviews/util.py
index 550c354f..67dc92c8 100644
--- a/geoviews/util.py
+++ b/geoviews/util.py
@@ -745,6 +745,8 @@ def from_xarray(da, crs=None, apply_transform=False, nan_nodata=False, **kwargs)
         from .element.geo import RGB, HvRGB
         el = RGB if 'crs' in kwargs else HvRGB
         vdims = el.vdims[:bands]
+        if bands == 4:
+            vdims.append("A")
         el = el(data, [x, y], vdims, **kwargs)
     if hasattr(el.data, 'attrs'):
         el.data.attrs = da.attrs

From 1702d7204a0ec66b99c08d1fc7a53e49b8769973 Mon Sep 17 00:00:00 2001
From: Andrew Huang <ahuang@anaconda.com>
Date: Wed, 13 Sep 2023 21:59:57 -0700
Subject: [PATCH 2/2] Add test

---
 geoviews/tests/assets/test_alpha.tif | Bin 0 -> 422 bytes
 geoviews/tests/test_util.py          |  13 +++++++++++++
 2 files changed, 13 insertions(+)
 create mode 100644 geoviews/tests/assets/test_alpha.tif

diff --git a/geoviews/tests/assets/test_alpha.tif b/geoviews/tests/assets/test_alpha.tif
new file mode 100644
index 0000000000000000000000000000000000000000..1cbffeb3dbe629a4e25bde2a44236c01005e1800
GIT binary patch
literal 422
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plsP#zw1f0;gJ}kaj@*)IvP+6U<~b}2iEs>e4_2@+seu^}rvdzYCp-WE

literal 0
HcmV?d00001

diff --git a/geoviews/tests/test_util.py b/geoviews/tests/test_util.py
index 4cd0c9fc..579cd237 100644
--- a/geoviews/tests/test_util.py
+++ b/geoviews/tests/test_util.py
@@ -1,3 +1,5 @@
+from pathlib import Path
+
 import cartopy.crs as ccrs
 import pytest
 
@@ -9,6 +11,7 @@
 except ImportError:
     rxr = None
 
+ASSETS_DIR = Path(__file__).parent / "assets"
 
 @pytest.mark.parametrize(
     "raw_crs",
@@ -45,3 +48,13 @@ def test_from_xarray():
     assert isinstance(output, gv.RGB)
     assert sorted(map(str, output.kdims)) == ["x", "y"]
     assert isinstance(output.crs, ccrs.CRS)
+
+
+@pytest.mark.skipif(rxr is None, reason="Needs rioxarray to be installed")
+def test_from_xarray_with_alpha():
+    file = str(ASSETS_DIR / "test_alpha.tif")
+    output = from_xarray(rxr.open_rasterio(file))
+
+    assert isinstance(output, gv.RGB)
+    assert sorted(map(str, output.kdims)) == ["x", "y"]
+    assert set(map(str, output.vdims)) == set(["R", "G", "B", "A"])