Merge pull request #8937 from tschaub/debug-tiles

Make the tile debug source useful for understanding tiles

examples/canvas-tiles.html

@@ -4,10 +4,7 @@ title: Canvas Tiles
 shortdesc: Renders tiles with coordinates for debugging.
 docs: >
   The black grid tiles are generated on the client with an HTML5 canvas. The
-  displayed tile coordinates are OpenLayers tile coordinates. These increase
-  from bottom to top, but standard XYZ tiling scheme coordinates increase from
-  top to bottom. To calculate the `y` for a standard XYZ tile coordinate, use
-  `-y - 1`.
+  displayed tile coordinates are the XYZ tile coordinates.
 tags: "layers, openstreetmap, canvas"
 ---
 <div id="map" class="map"></div>

examples/canvas-tiles.js

@@ -1,26 +1,21 @@
 import Map from '../src/ol/Map.js';
 import View from '../src/ol/View.js';
 import TileLayer from '../src/ol/layer/Tile.js';
-import {fromLonLat} from '../src/ol/proj.js';
 import {OSM, TileDebug} from '../src/ol/source.js';
 
 
-const osmSource = new OSM();
 const map = new Map({
   layers: [
     new TileLayer({
-      source: osmSource
+      source: new OSM()
     }),
     new TileLayer({
-      source: new TileDebug({
-        projection: 'EPSG:3857',
-        tileGrid: osmSource.getTileGrid()
-      })
+      source: new TileDebug()
     })
   ],
   target: 'map',
   view: new View({
-    center: fromLonLat([-0.1275, 51.507222]),
-    zoom: 10
+    center: [0, 0],
+    zoom: 1
   })
 });