51 lines
1.2 KiB
JavaScript
51 lines
1.2 KiB
JavaScript
goog.require('ol.Map');
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goog.require('ol.View');
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goog.require('ol.layer.Tile');
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goog.require('ol.proj');
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goog.require('ol.source.TileJSON');
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function transform(extent) {
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return ol.proj.transformExtent(extent, 'EPSG:4326', 'EPSG:3857');
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}
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var extents = {
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northwest: transform([-180, 0, 0, 85]),
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northeast: transform([0, 0, 180, 85]),
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southeast: transform([0, -85, 180, 0]),
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southwest: transform([-180, -85, 0, 0]),
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world: transform([-180, -85, 180, 85])
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};
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var base = new ol.layer.Tile({
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source: new ol.source.TileJSON({
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url: 'http://api.tiles.mapbox.com/v3/' +
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'mapbox.world-black.jsonp',
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crossOrigin: 'anonymous'
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})
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});
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var overlay = new ol.layer.Tile({
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extent: extents.northwest,
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source: new ol.source.TileJSON({
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url: 'http://api.tiles.mapbox.com/v3/' +
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'mapbox.world-glass.jsonp',
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crossOrigin: 'anonymous'
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})
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});
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var map = new ol.Map({
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layers: [base, overlay],
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renderer: exampleNS.getRendererFromQueryString(),
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target: 'map',
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view: new ol.View({
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center: [0, 0],
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zoom: 1
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})
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});
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for (var key in extents) {
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document.getElementById(key).onclick = function(event) {
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overlay.setExtent(extents[event.target.id]);
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};
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}
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