71 lines
1.7 KiB
JavaScript
71 lines
1.7 KiB
JavaScript
import Map from '../src/ol/Map.js';
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import View from '../src/ol/View.js';
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import {getWidth} from '../src/ol/extent.js';
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import GeoJSON from '../src/ol/format/GeoJSON.js';
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import VectorLayer from '../src/ol/layer/Vector.js';
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import VectorSource from '../src/ol/source/Vector.js';
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import {Fill, Stroke, Style, Text} from '../src/ol/style.js';
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const map = new Map({
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target: 'map',
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view: new 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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const labelStyle = new Style({
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geometry: function(feature) {
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let geometry = feature.getGeometry();
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if (geometry.getType() == 'MultiPolygon') {
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// Only render label for the widest polygon of a multipolygon
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const polygons = geometry.getPolygons();
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let widest = 0;
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for (let i = 0, ii = polygons.length; i < ii; ++i) {
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const polygon = polygons[i];
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const width = getWidth(polygon.getExtent());
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if (width > widest) {
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widest = width;
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geometry = polygon;
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}
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}
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}
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return geometry;
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},
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text: new Text({
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font: '12px Calibri,sans-serif',
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overflow: true,
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fill: new Fill({
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color: '#000'
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}),
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stroke: new Stroke({
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color: '#fff',
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width: 3
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})
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})
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});
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const countryStyle = new Style({
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fill: new Fill({
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color: 'rgba(255, 255, 255, 0.6)'
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}),
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stroke: new Stroke({
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color: '#319FD3',
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width: 1
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})
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});
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const style = [countryStyle, labelStyle];
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const vectorLayer = new VectorLayer({
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source: new VectorSource({
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url: 'data/geojson/countries.geojson',
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format: new GeoJSON()
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}),
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style: function(feature) {
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labelStyle.getText().setText(feature.get('name'));
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return style;
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},
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declutter: true
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});
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map.addLayer(vectorLayer);
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