54 lines
1.4 KiB
JavaScript
54 lines
1.4 KiB
JavaScript
// NOCOMPILE
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// this example uses JSTS for which we don't have an externs file.
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goog.require('ol.Feature');
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goog.require('ol.Map');
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goog.require('ol.View');
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goog.require('ol.format.GeoJSON');
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goog.require('ol.layer.Tile');
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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.MapQuest');
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goog.require('ol.source.Vector');
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var source = new ol.source.Vector();
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$.ajax('data/geojson/roads-seoul.geojson').then(function(response) {
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var format = new ol.format.GeoJSON();
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var features = format.readFeatures(response,
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{featureProjection: 'EPSG:3857'});
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var parser = new jsts.io.olParser();
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for (var i = 0; i < features.length; i++) {
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var feature = features[i];
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// convert the OpenLayers geometry to a JSTS geometry
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var jstsGeom = parser.read(feature.getGeometry());
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// create a buffer of 40 meters around each line
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var buffered = jstsGeom.buffer(40);
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// convert back from JSTS and replace the geometry on the feature
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feature.setGeometry(parser.write(buffered));
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}
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source.addFeatures(features);
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});
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var vectorLayer = new ol.layer.Vector({
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source: source
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});
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var rasterLayer = new ol.layer.Tile({
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source: new ol.source.MapQuest({
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layer: 'osm'
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})
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});
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var map = new ol.Map({
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layers: [rasterLayer, vectorLayer],
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target: document.getElementById('map'),
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view: new ol.View({
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center: ol.proj.fromLonLat([126.979293, 37.528787]),
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zoom: 15
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})
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});
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