diff --git a/src/ol/source/BingMaps.js b/src/ol/source/BingMaps.js
index bbfbbbe557..c12e5d9aa7 100644
--- a/src/ol/source/BingMaps.js
+++ b/src/ol/source/BingMaps.js
@@ -45,6 +45,48 @@ const TOS_ATTRIBUTION = '<a class="ol-attribution-bing-tos" ' +
  */
 
 
+/**
+ * @typedef {Object} BingMapsImageryMetadataResponse
+ * @property {number} statusCode The response status code
+ * @property {string} statusDescription The response status description
+ * @property {string} authenticationResultCode The authentication result code
+ * @property {Array<ResourceSet>} resourceSets The array of resource sets
+ */
+
+
+/**
+ * @typedef {Object} ResourceSet
+ * @property {Array<Resource>} resources
+ */
+
+
+/**
+ * @typedef {Object} Resource
+ * @property {number} imageHeight The image height
+ * @property {number} imageWidth The image width
+ * @property {number} zoomMin The minimum zoom level
+ * @property {number} zoomMax The maximum zoom level
+ * @property {string} imageUrl The image URL
+ * @property {Array<string>} imageUrlSubdomains The image URL subdomains for rotation
+ * @property {Array<ImageryProvider>} [imageryProviders] The array of ImageryProviders
+ */
+
+
+/**
+ * @typedef {Object} ImageryProvider
+ * @property {Array<CoverageArea>} coverageAreas The coverage areas
+ * @property {string} [attribution] The attribution
+ */
+
+
+/**
+ * @typedef {Object} CoverageArea
+ * @property {number} zoomMin The minimum zoom
+ * @property {number} zoomMax The maximum zoom
+ * @property {Array<number>} bbox The coverage bounding box
+ */
+
+
 /**
  * @classdesc
  * Layer source for Bing Maps tile data.
@@ -150,13 +192,16 @@ class BingMaps extends TileImage {
 
     const sourceProjection = this.getProjection();
     const extent = extentFromProjection(sourceProjection);
+    const scale = this.hidpi_ ? 2 : 1;
     const tileSize = resource.imageWidth == resource.imageHeight ?
-      resource.imageWidth : [resource.imageWidth, resource.imageHeight];
+      resource.imageWidth / scale :
+      [resource.imageWidth / scale, resource.imageHeight / scale];
+
     const tileGrid = createXYZ({
       extent: extent,
       minZoom: resource.zoomMin,
       maxZoom: maxZoom,
-      tileSize: tileSize / (this.hidpi_ ? 2 : 1)
+      tileSize: tileSize
     });
     this.tileGrid = tileGrid;