43 lines
1.1 KiB
JavaScript
43 lines
1.1 KiB
JavaScript
import GeoJSON from '../src/ol/format/GeoJSON.js';
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import Map from '../src/ol/Map.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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import View from '../src/ol/View.js';
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import {Fill, Style} from '../src/ol/style.js';
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import {Tile as TileLayer, Vector as VectorLayer} from '../src/ol/layer.js';
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import {fromLonLat} from '../src/ol/proj.js';
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import {getVectorContext} from '../src/ol/render.js';
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const base = new TileLayer({
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source: new OSM(),
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});
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const clipLayer = new VectorLayer({
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style: new Style({
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fill: new Fill({
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color: 'black',
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}),
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}),
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source: new VectorSource({
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url: './data/geojson/switzerland.geojson',
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format: new GeoJSON(),
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}),
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});
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clipLayer.on('prerender', function (e) {
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e.context.globalCompositeOperation = 'destination-in';
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});
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clipLayer.on('postrender', function (e) {
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e.context.globalCompositeOperation = 'source-over';
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});
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const map = new Map({
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layers: [base, clipLayer],
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target: 'map',
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view: new View({
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center: fromLonLat([8.23, 46.86]),
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zoom: 7,
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}),
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});
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