Add EPSG:4326 example

examples/epsg-4326.js

@@ -0,0 +1,56 @@
+goog.require('goog.debug.Console');
+goog.require('goog.debug.Logger');
+goog.require('goog.debug.Logger.Level');
+goog.require('ol.Collection');
+goog.require('ol.Coordinate');
+goog.require('ol.Map');
+goog.require('ol.Projection');
+goog.require('ol.RendererHint');
+goog.require('ol.View2D');
+goog.require('ol.layer.TileLayer');
+goog.require('ol.source.TiledWMS');
+
+
+if (goog.DEBUG) {
+  goog.debug.Console.autoInstall();
+  goog.debug.Logger.getLogger('ol').setLevel(goog.debug.Logger.Level.INFO);
+}
+
+var epsg4326 = ol.Projection.getFromCode('EPSG:4326');
+
+// We give the single image source a set of resolutions. This prevents the
+// source from requesting images of arbitrary resolutions.
+var projectionExtent = epsg4326.getExtent();
+var maxResolution = Math.max(
+    projectionExtent.maxX - projectionExtent.minX,
+    projectionExtent.maxY - projectionExtent.minY) / 256;
+var resolutions = new Array(10);
+for (var i = 0; i < 10; ++i) {
+  resolutions[i] = maxResolution / Math.pow(2.0, i);
+}
+
+var layers = new ol.Collection([
+  new ol.layer.TileLayer({
+    source: new ol.source.TiledWMS({
+      url: 'http://vmap0.tiles.osgeo.org/wms/vmap0',
+      crossOrigin: null,
+      params: {
+        'LAYERS': 'basic',
+        'FORMAT': 'image/jpeg'
+      },
+      projection: epsg4326
+    })
+  })
+]);
+
+var map = new ol.Map({
+  layers: layers,
+  // The OSgeo server does not set cross origin headers, so we cannot use WebGL
+  renderers: [ol.RendererHint.CANVAS, ol.RendererHint.DOM],
+  target: 'map',
+  view: new ol.View2D({
+    projection: epsg4326,
+    center: new ol.Coordinate(0, 0),
+    zoom: 2
+  })
+});