75 lines
1.9 KiB
JavaScript
75 lines
1.9 KiB
JavaScript
import Map from '../src/ol/Map.js';
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import TileLayer from '../src/ol/layer/Tile.js';
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import View from '../src/ol/View.js';
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import XYZ from '../src/ol/source/XYZ.js';
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const key = 'get_your_own_D6rA4zTHduk6KOKTXzGB';
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const attributions =
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'<a href="https://www.maptiler.com/copyright/" target="_blank">© MapTiler</a> ' +
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'<a href="https://www.openstreetmap.org/copyright" target="_blank">© OpenStreetMap contributors</a>';
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const notInterpolated = new TileLayer({
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source: new XYZ({
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attributions: attributions,
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url:
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'https://api.maptiler.com/tiles/terrain-rgb/{z}/{x}/{y}.png?key=' + key,
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tileSize: 512,
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maxZoom: 12,
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crossOrigin: '',
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interpolate: false,
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}),
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});
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const interpolated = new TileLayer({
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source: new XYZ({
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attributions: attributions,
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url:
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'https://api.maptiler.com/tiles/terrain-rgb/{z}/{x}/{y}.png?key=' + key,
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tileSize: 512,
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maxZoom: 12,
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crossOrigin: '',
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}),
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});
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const view = new View({
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center: [6.893, 45.8295],
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zoom: 16,
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projection: 'EPSG:4326',
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});
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const map1 = new Map({
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target: 'map1',
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layers: [notInterpolated],
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view: view,
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});
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const map2 = new Map({
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target: 'map2',
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layers: [interpolated],
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view: view,
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});
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function getHeight(rgba) {
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return -10000 + (rgba[0] * 256 * 256 + rgba[1] * 256 + rgba[2]) * 0.1;
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}
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const info1 = document.getElementById('info1');
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const info2 = document.getElementById('info2');
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const showElevations = function (evt) {
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if (evt.dragging) {
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return;
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}
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const notInterpolatedPixel = notInterpolated.getData(evt.pixel);
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info1.innerText = notInterpolatedPixel
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? getHeight(notInterpolatedPixel).toFixed(1)
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: '-';
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const interpolatedPixel = interpolated.getData(evt.pixel);
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info2.innerText = interpolatedPixel
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? getHeight(interpolatedPixel).toFixed(1)
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: '-';
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};
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map1.on('pointermove', showElevations);
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map2.on('pointermove', showElevations);
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