Add example showing vector tiles in EPSG:4326

2019-10-03 12:34:42 +02:00
parent 3ab32ff744
commit db583be0f9
2 changed files with 71 additions and 0 deletions
--- a/examples/vector-tiles-4326.html
+++ b/examples/vector-tiles-4326.html
@@ -0,0 +1,13 @@
+---
+layout: example.html
+title: Vector tiles in EPSG:4326
+shortdesc: Example showing vector tiles in EPSG:4326 (styled using ol-mapbox-style)
+docs: >
+  Example showing vector tiles in EPSG:4326 (styled using `ol-mapbox-style`) loaded from maptiler.com.
+  **Note**: Make sure to get your own API key at https://www.maptiler.com/cloud/ when using this example. No map will be visible when the API key has expired.
+tags: "vector tiles, epsg4326, mapbox style, ol-mapbox-style, maptiler"
+cloak:
+  - key: get_your_own_D6rA4zTHduk6KOKTXzGB
+    value: Get your own API key at https://www.maptiler.com/cloud/
+---
+<div id="map" class="map" style="background:none;"></div>
--- a/examples/vector-tiles-4326.js
+++ b/examples/vector-tiles-4326.js
@@ -0,0 +1,58 @@
+import Map from '../src/ol/Map.js';
+import View from '../src/ol/View.js';
+import MVT from '../src/ol/format/MVT.js';
+import VectorTileLayer from '../src/ol/layer/VectorTile.js';
+import VectorTileSource from '../src/ol/source/VectorTile.js';
+import TileGrid from '../src/ol/tilegrid/TileGrid.js';
+
+import {applyStyle, applyBackground} from 'ol-mapbox-style';
+
+const key = 'get_your_own_D6rA4zTHduk6KOKTXzGB';
+
+const tileGridOptions = {
+  extent: [-180, -90, 180, 90],
+  sizes: [[2, 1], [4, 2], [8, 4], [16, 8], [32, 16], [64, 32], [128, 64], [256, 128], [512, 256], [1024, 512], [2048, 1024], [4096, 2048], [8192, 4096], [16384, 8192]],
+  tileSize: 512,
+  resolutions: [0.3515625, 0.17578125, 0.087890625, 0.0439453125, 0.02197265625, 0.010986328125, 0.0054931640625, 0.00274658203125, 0.001373291015625, 0.0006866455078125, 0.00034332275390625, 0.000171661376953125, 8.58306884765625e-05, 4.291534423828125e-05]
+};
+
+const map = new Map({
+  target: 'map',
+  view: new View({
+    projection: 'EPSG:4326',
+    center: [0, 35],
+    zoom: 1
+  })
+});
+
+fetch('https://api.maptiler.com/maps/basic-4326/style.json?key=' + key)
+  .then(function(res) {
+    return res.json();
+  })
+  .then(function(style) {
+    Object.keys(style.sources).forEach(function(sourceId) {
+      const source = style.sources[sourceId];
+      if (source && source.url && source.type == 'vector') {
+        fetch(source.url)
+          .then(function(res) {
+            return res.json();
+          })
+          .then(function(tilejson) {
+            const layer = new VectorTileLayer({
+              declutter: true,
+              source: new VectorTileSource({
+                attribution: tilejson.attribution,
+                format: new MVT(),
+                projection: 'EPSG:4326',
+                tileGrid: new TileGrid(tileGridOptions),
+                urls: tilejson.tiles
+              })
+            });
+            map.addLayer(layer);
+
+            applyStyle(layer, style, sourceId, undefined, tileGridOptions.resolutions);
+          });
+      }
+    });
+    applyBackground(map, style);
+  });