Merge pull request #12703 from adamwirth/wmts-tile-threshold-removal

Raise WMTS imagery provider tile count threshold

Author: lukemckinstry

CHANGES.md

@@ -8,6 +8,10 @@
 
 - Removed the argument fallback in `ITwinData.*` functions. Please switch to the new options argument signature [#12778](https://github.com/CesiumGS/cesium/issues/12778)
 
+#### Fixes :wrench:
+
+- Removes the minimum tile threshold of four for WMTS. [#4372](https://github.com/CesiumGS/cesium/issues/4372)
+
 #### Additions :tada:
 
 - Added support for the [EXT_mesh_primitive_restart](https://github.com/KhronosGroup/glTF/pull/2478) glTF extension. [#12764](https://github.com/CesiumGS/cesium/issues/12764)

packages/engine/Source/Scene/WebMapTileServiceImageryProvider.js

@@ -4,7 +4,6 @@ import Frozen from "../Core/Frozen.js";
 import defined from "../Core/defined.js";
 import DeveloperError from "../Core/DeveloperError.js";
 import Event from "../Core/Event.js";
-import Rectangle from "../Core/Rectangle.js";
 import Resource from "../Core/Resource.js";
 import WebMercatorTilingScheme from "../Core/WebMercatorTilingScheme.js";
 import ImageryProvider from "./ImageryProvider.js";
@@ -208,27 +207,6 @@ function WebMapTileServiceImageryProvider(options) {
     });
   }
 
-  // Check the number of tiles at the minimum level.  If it's more than four,
-  // throw an exception, because starting at the higher minimum
-  // level will cause too many tiles to be downloaded and rendered.
-  const swTile = this._tilingScheme.positionToTileXY(
-    Rectangle.southwest(this._rectangle),
-    this._minimumLevel,
-  );
-  const neTile = this._tilingScheme.positionToTileXY(
-    Rectangle.northeast(this._rectangle),
-    this._minimumLevel,
-  );
-  const tileCount =
-    (Math.abs(neTile.x - swTile.x) + 1) * (Math.abs(neTile.y - swTile.y) + 1);
-  //>>includeStart('debug', pragmas.debug);
-  if (tileCount > 4) {
-    throw new DeveloperError(
-      `The imagery provider's rectangle and minimumLevel indicate that there are ${tileCount} tiles at the minimum level. Imagery providers with more than four tiles at the minimum level are not supported.`,
-    );
-  }
-  //>>includeEnd('debug');
-
   this._errorEvent = new Event();
 
   const credit = options.credit;