79c8afdba8
To have the same path (starting with `ol/`, without `.js`) as in the documentation. The support was added in the webpack config in #8928
88 lines
2.2 KiB
JavaScript
88 lines
2.2 KiB
JavaScript
import Feature from 'ol/Feature';
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import Geolocation from 'ol/Geolocation';
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import Map from 'ol/Map';
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import View from 'ol/View';
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import Point from 'ol/geom/Point';
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import {Tile as TileLayer, Vector as VectorLayer} from 'ol/layer';
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import {OSM, Vector as VectorSource} from 'ol/source';
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import {Circle as CircleStyle, Fill, Stroke, Style} from 'ol/style';
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const view = new View({
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center: [0, 0],
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zoom: 2
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});
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const map = new Map({
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layers: [
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new TileLayer({
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source: new OSM()
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})
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],
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target: 'map',
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view: view
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});
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const geolocation = new Geolocation({
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// enableHighAccuracy must be set to true to have the heading value.
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trackingOptions: {
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enableHighAccuracy: true
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},
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projection: view.getProjection()
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});
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function el(id) {
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return document.getElementById(id);
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}
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el('track').addEventListener('change', function() {
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geolocation.setTracking(this.checked);
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});
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// update the HTML page when the position changes.
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geolocation.on('change', function() {
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el('accuracy').innerText = geolocation.getAccuracy() + ' [m]';
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el('altitude').innerText = geolocation.getAltitude() + ' [m]';
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el('altitudeAccuracy').innerText = geolocation.getAltitudeAccuracy() + ' [m]';
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el('heading').innerText = geolocation.getHeading() + ' [rad]';
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el('speed').innerText = geolocation.getSpeed() + ' [m/s]';
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});
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// handle geolocation error.
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geolocation.on('error', function(error) {
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const info = document.getElementById('info');
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info.innerHTML = error.message;
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info.style.display = '';
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});
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const accuracyFeature = new Feature();
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geolocation.on('change:accuracyGeometry', function() {
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accuracyFeature.setGeometry(geolocation.getAccuracyGeometry());
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});
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const positionFeature = new Feature();
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positionFeature.setStyle(new Style({
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image: new CircleStyle({
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radius: 6,
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fill: new Fill({
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color: '#3399CC'
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}),
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stroke: new Stroke({
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color: '#fff',
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width: 2
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})
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})
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}));
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geolocation.on('change:position', function() {
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const coordinates = geolocation.getPosition();
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positionFeature.setGeometry(coordinates ?
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new Point(coordinates) : null);
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});
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new VectorLayer({
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map: map,
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source: new VectorSource({
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features: [accuracyFeature, positionFeature]
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})
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});
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