ad62739a6e
In addition to using const and let, this also upgrades our linter config and removes lint (mostly whitespace).
52 lines
1.5 KiB
JavaScript
52 lines
1.5 KiB
JavaScript
// NOCOMPILE
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// this example uses JSTS for which we don't have an externs file.
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import Map from '../src/ol/Map.js';
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import View from '../src/ol/View.js';
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import GeoJSON from '../src/ol/format/GeoJSON.js';
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import TileLayer from '../src/ol/layer/Tile.js';
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import VectorLayer from '../src/ol/layer/Vector.js';
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import {fromLonLat} from '../src/ol/proj.js';
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import OSM from '../src/ol/source/OSM.js';
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import VectorSource from '../src/ol/source/Vector.js';
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const source = new VectorSource();
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fetch('data/geojson/roads-seoul.geojson').then(function(response) {
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return response.json();
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}).then(function(json) {
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const format = new GeoJSON();
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const features = format.readFeatures(json, {featureProjection: 'EPSG:3857'});
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const parser = new jsts.io.OL3Parser();
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for (let i = 0; i < features.length; i++) {
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const feature = features[i];
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// convert the OpenLayers geometry to a JSTS geometry
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const jstsGeom = parser.read(feature.getGeometry());
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// create a buffer of 40 meters around each line
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const 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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const vectorLayer = new VectorLayer({
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source: source
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});
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const rasterLayer = new TileLayer({
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source: new OSM()
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});
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const map = new Map({
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layers: [rasterLayer, vectorLayer],
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target: document.getElementById('map'),
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view: new View({
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center: fromLonLat([126.979293, 37.528787]),
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zoom: 15
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})
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});
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