70 lines
1.7 KiB
JavaScript
70 lines
1.7 KiB
JavaScript
goog.require('ol.Map');
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goog.require('ol.View2D');
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goog.require('ol.format.TopoJSON');
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goog.require('ol.layer.Vector');
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goog.require('ol.proj');
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goog.require('ol.source.TileVector');
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goog.require('ol.style.Stroke');
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goog.require('ol.style.Style');
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goog.require('ol.tilegrid.XYZ');
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var vectorSource = new ol.source.TileVector({
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format: new ol.format.TopoJSON({
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defaultProjection: 'EPSG:4326'
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}),
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projection: 'EPSG:3857',
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tileGrid: new ol.tilegrid.XYZ({
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maxZoom: 19
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}),
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url: 'http://{a-c}.tile.openstreetmap.us/' +
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'vectiles-highroad/{z}/{x}/{y}.topojson'
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});
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var styleCache = {};
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var styleFunction = function(feature, resolution) {
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var kind = feature.get('kind');
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var railway = feature.get('railway');
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var sort_key = feature.get('sort_key');
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var styleKey = kind + '/' + railway + '/' + sort_key;
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var styleArray = styleCache[styleKey];
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if (!styleArray) {
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var color, width;
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if (railway) {
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color = '#7de';
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width = 1;
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} else {
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color = {
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'major_road': '#776',
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'minor_road': '#ccb',
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'highway': '#f39'
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}[kind];
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width = kind == 'highway' ? 1.5 : 1;
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}
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styleArray = [new ol.style.Style({
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stroke: new ol.style.Stroke({
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color: color,
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width: width
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}),
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zIndex: sort_key
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})];
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styleCache[styleKey] = styleArray;
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}
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return styleArray;
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};
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var vector = new ol.layer.Vector({
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source: vectorSource,
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style: styleFunction
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});
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var map = new ol.Map({
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layers: [vector],
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renderer: 'canvas',
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target: document.getElementById('map'),
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view: new ol.View2D({
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center: ol.proj.transform([-74.0064, 40.7142], 'EPSG:4326', 'EPSG:3857'),
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maxZoom: 19,
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zoom: 14
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})
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});
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