diff --git a/package-lock.json b/package-lock.json
index cc46d56..33e1637 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,7 +9,8 @@
       "version": "0.10.1",
       "license": "MIT",
       "dependencies": {
-        "@wowserhq/io": "^2.0.2"
+        "@wowserhq/io": "^2.0.2",
+        "gl-matrix": "^3.4.3"
       },
       "devDependencies": {
         "@commitlint/config-conventional": "^18.4.3",
@@ -3110,6 +3111,11 @@
         "node": ">=10"
       }
     },
+    "node_modules/gl-matrix": {
+      "version": "3.4.3",
+      "resolved": "https://registry.npmjs.org/gl-matrix/-/gl-matrix-3.4.3.tgz",
+      "integrity": "sha512-wcCp8vu8FT22BnvKVPjXa/ICBWRq/zjFfdofZy1WSpQZpphblv12/bOQLBC1rMM7SGOFS9ltVmKOHil5+Ml7gA=="
+    },
     "node_modules/glob": {
       "version": "7.2.3",
       "resolved": "https://registry.npmjs.org/glob/-/glob-7.2.3.tgz",
@@ -7832,6 +7838,11 @@
         }
       }
     },
+    "gl-matrix": {
+      "version": "3.4.3",
+      "resolved": "https://registry.npmjs.org/gl-matrix/-/gl-matrix-3.4.3.tgz",
+      "integrity": "sha512-wcCp8vu8FT22BnvKVPjXa/ICBWRq/zjFfdofZy1WSpQZpphblv12/bOQLBC1rMM7SGOFS9ltVmKOHil5+Ml7gA=="
+    },
     "glob": {
       "version": "7.2.3",
       "resolved": "https://registry.npmjs.org/glob/-/glob-7.2.3.tgz",
diff --git a/package.json b/package.json
index 53d45a4..b0b472d 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,8 @@
     "wowser"
   ],
   "dependencies": {
-    "@wowserhq/io": "^2.0.2"
+    "@wowserhq/io": "^2.0.2",
+    "gl-matrix": "^3.4.3"
   },
   "devDependencies": {
     "@commitlint/config-conventional": "^18.4.3",
diff --git a/src/lib/map/Map.ts b/src/lib/map/Map.ts
index 44e63cf..59bb922 100644
--- a/src/lib/map/Map.ts
+++ b/src/lib/map/Map.ts
@@ -1,4 +1,5 @@
 import { IoMode, IoSource, openStream } from '@wowserhq/io';
+import { quat } from 'gl-matrix';
 import * as wdtIo from './io/wdt.js';
 import {
   AREA_INFO_FLAG,
@@ -56,6 +57,37 @@ class Map {
     };
   }
 
+  /**
+   * Convert the given position vector in the doodad or map obj def coordinate system into a vector
+   * in the map coordinate system.
+   *
+   * @param defPosition - Vector in doodad / map obj def coordinate system
+   */
+  static getNormalizedDefPosition(defPosition: Float32Array) {
+    const normalized = new Float32Array(3);
+
+    normalized[0] = MAP_CORNER_X - defPosition[2];
+    normalized[1] = MAP_CORNER_Y - defPosition[0];
+    normalized[2] = defPosition[1];
+
+    return normalized;
+  }
+
+  /**
+   * Convert the given Euler angle in the doodad or map obj def coordinate system into a quaternion
+   * in the map coordinate system.
+   *
+   * @param defRotation - Euler angle in doodad / map obj def coordinate system
+   */
+  static getNormalizedDefRotation(defRotation: Float32Array) {
+    const normalized = quat.create();
+
+    // glMatrix defaults to the correct euler order (zyx) to convert to the map coordinate system
+    quat.fromEuler(normalized, defRotation[2], defRotation[0], defRotation[1] + 180);
+
+    return normalized as Float32Array;
+  }
+
   load(source: IoSource) {
     const stream = openStream(source, IoMode.Read);
     const chunks = wdtIo.wdt.read(stream);
diff --git a/src/lib/map/MapArea.ts b/src/lib/map/MapArea.ts
index 40eb70b..bd17666 100644
--- a/src/lib/map/MapArea.ts
+++ b/src/lib/map/MapArea.ts
@@ -2,6 +2,7 @@ import { IoMode, IoSource, openStream } from '@wowserhq/io';
 import * as adtIo from './io/adt.js';
 import * as commonIo from './io/common.js';
 import { indexChunks } from '../util.js';
+import Map from './Map.js';
 import MapChunk from './MapChunk.js';
 import MapLayer from './MapLayer.js';
 import MapDoodadDef from './MapDoodadDef.js';
@@ -68,7 +69,7 @@ class MapArea {
     return this;
   }
 
-  #loadDoodadDefs(defs: any[], areaData: Map<string, any>) {
+  #loadDoodadDefs(defs: any[], areaData: globalThis.Map<string, any>) {
     if (!defs || defs.length === 0) {
       return;
     }
@@ -80,13 +81,16 @@ class MapArea {
       names.offset = nameOfs[def.nameId];
       const name = commonIo.mapString.read(names);
 
+      const normalizedPosition = Map.getNormalizedDefPosition(def.position);
+      const normalizedRotation = Map.getNormalizedDefRotation(def.rotation);
+
       this.#doodadDefs.push(
-        new MapDoodadDef(name, def.uniqueId, def.position, def.rotation, def.scale),
+        new MapDoodadDef(name, def.uniqueId, normalizedPosition, normalizedRotation, def.scale),
       );
     }
   }
 
-  #loadObjDefs(defs: any[], areaData: Map<string, any>) {
+  #loadObjDefs(defs: any[], areaData: globalThis.Map<string, any>) {
     if (!defs || defs.length === 0) {
       return;
     }
@@ -98,17 +102,24 @@ class MapArea {
       names.offset = nameOfs[def.nameId];
       const name = commonIo.mapString.read(names);
 
-      this.#objDefs.push(new MapObjDef(name, def.uniqueId, def.position, def.rotation));
+      const normalizedPosition = Map.getNormalizedDefPosition(def.position);
+      const normalizedRotation = Map.getNormalizedDefRotation(def.rotation);
+
+      this.#objDefs.push(new MapObjDef(name, def.uniqueId, normalizedPosition, normalizedRotation));
     }
   }
 
-  #loadChunks(chunks: any[], areaData: Map<string, any>) {
+  #loadChunks(chunks: any[], areaData: globalThis.Map<string, any>) {
     for (const chunk of chunks) {
       this.#loadChunk(chunk.header, indexChunks(chunk.data), areaData);
     }
   }
 
-  #loadChunk(chunkHeader: any, chunkData: Map<string, any>, areaData: Map<string, any>) {
+  #loadChunk(
+    chunkHeader: any,
+    chunkData: globalThis.Map<string, any>,
+    areaData: globalThis.Map<string, any>,
+  ) {
     const chunk = new MapChunk(chunkHeader.position, chunkHeader.holes);
 
     // Vertices
diff --git a/src/lib/map/MapDoodadDef.ts b/src/lib/map/MapDoodadDef.ts
index 071c0aa..0f2f597 100644
--- a/src/lib/map/MapDoodadDef.ts
+++ b/src/lib/map/MapDoodadDef.ts
@@ -1,12 +1,8 @@
-import { MAP_CORNER_X, MAP_CORNER_Y } from './const.js';
-
 class MapDoodadDef {
   #name: string;
   #id: number;
   #position: Float32Array;
-  #mapPosition: Float32Array;
   #rotation: Float32Array;
-  #mapRotation: Float32Array;
   #scale: number;
 
   constructor(
@@ -21,18 +17,6 @@ class MapDoodadDef {
     this.#position = position;
     this.#rotation = rotation;
     this.#scale = scale;
-
-    // Doodad defs (map placements) are stored in a Y-up right-handed coordinate system
-
-    this.#mapPosition = new Float32Array(3);
-    this.#mapPosition[0] = MAP_CORNER_X - position[2];
-    this.#mapPosition[1] = MAP_CORNER_Y - position[0];
-    this.#mapPosition[2] = position[1];
-
-    this.#mapRotation = new Float32Array(3);
-    this.#mapRotation[0] = rotation[2];
-    this.#mapRotation[1] = rotation[0];
-    this.#mapRotation[2] = rotation[1] - 180;
   }
 
   get name() {
@@ -43,22 +27,20 @@ class MapDoodadDef {
     return this.#id;
   }
 
+  /**
+   * Returns vector representing doodad placement position in the map coordinate system.
+   */
   get position() {
     return this.#position;
   }
 
-  get mapPosition() {
-    return this.#mapPosition;
-  }
-
+  /**
+   * Returns quaternion representing doodad placement rotation in the map coordinate system.
+   */
   get rotation() {
     return this.#rotation;
   }
 
-  get mapRotation() {
-    return this.#mapRotation;
-  }
-
   get scale() {
     return this.#scale;
   }
diff --git a/src/lib/map/MapObjDef.ts b/src/lib/map/MapObjDef.ts
index 2d5811c..cd053f0 100644
--- a/src/lib/map/MapObjDef.ts
+++ b/src/lib/map/MapObjDef.ts
@@ -4,7 +4,7 @@ class MapObjDef {
   #position: Float32Array;
   #rotation: Float32Array;
 
-  constructor(name, id, position, rotation) {
+  constructor(name: string, id: number, position: Float32Array, rotation: Float32Array) {
     this.#name = name;
     this.#id = id;
     this.#position = position;
@@ -19,10 +19,16 @@ class MapObjDef {
     return this.#id;
   }
 
+  /**
+   * Returns vector representing doodad placement position in the map coordinate system.
+   */
   get position() {
     return this.#position;
   }
 
+  /**
+   * Returns quaternion representing doodad placement rotation in the map coordinate system.
+   */
   get rotation() {
     return this.#rotation;
   }
diff --git a/src/spec/map/MapArea.spec.ts b/src/spec/map/MapArea.spec.ts
index bab49a7..94d7ad6 100644
--- a/src/spec/map/MapArea.spec.ts
+++ b/src/spec/map/MapArea.spec.ts
@@ -14,6 +14,23 @@ describe('MapArea', () => {
         expect(mapArea.doodadDefs.length).toBe(381);
         expect(mapArea.objDefs.length).toBe(19);
       });
+
+      test('should contain doodad defs in the expected format', () => {
+        const map = new Map().load('./fixture/map/continent.wdt');
+        const mapArea = new MapArea(map.layerSplatDepth).load('./fixture/map/continent4229.adt');
+
+        const doodadDef1 = mapArea.doodadDefs.find((def) => def.id === 206410);
+        expect(doodadDef1.name.split(/\\/).at(-1)).toBe('TIRISFALLGLADECANOPYTREE05.M2');
+        expect(doodadDef1.rotation).toEqual(new Float32Array([0, 0, 1, 6.123234262925839e-17]));
+
+        const doodadDef2 = mapArea.doodadDefs.find((def) => def.id === 2542963);
+        expect(doodadDef2.name.split(/\\/).at(-1)).toBe('TIRISFALLGLADECANOPYTREE05.M2');
+        expect(doodadDef2.rotation).toEqual(
+          new Float32Array([
+            0.0701502189040184, -0.038644179701805115, 0.9901213645935059, 0.11508788913488388,
+          ]),
+        );
+      });
     });
 
     describe('pvpzone', () => {