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
74 lines
1.9 KiB
JavaScript
74 lines
1.9 KiB
JavaScript
import Map from 'ol/Map';
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import View from 'ol/View';
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import {getWidth, getTopLeft} from 'ol/extent';
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import TileLayer from 'ol/layer/Tile';
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import {get as getProjection} from 'ol/proj';
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import OSM from 'ol/source/OSM';
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import WMTS from 'ol/source/WMTS';
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import WMTSTileGrid from 'ol/tilegrid/WMTS';
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// create the WMTS tile grid in the google projection
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const projection = getProjection('EPSG:3857');
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const tileSizePixels = 256;
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const tileSizeMtrs = getWidth(projection.getExtent()) / tileSizePixels;
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const matrixIds = [];
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const resolutions = [];
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for (let i = 0; i <= 14; i++) {
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matrixIds[i] = i;
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resolutions[i] = tileSizeMtrs / Math.pow(2, i);
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}
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const tileGrid = new WMTSTileGrid({
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origin: getTopLeft(projection.getExtent()),
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resolutions: resolutions,
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matrixIds: matrixIds
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});
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const scalgoToken = 'CC5BF28A7D96B320C7DFBFD1236B5BEB';
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const wmtsSource = new WMTS({
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url: 'http://ts2.scalgo.com/olpatch/wmts?token=' + scalgoToken,
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layer: 'SRTM_4_1:SRTM_4_1_flooded_sealevels',
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format: 'image/png',
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matrixSet: 'EPSG:3857',
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attributions: [
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'<a href="http://scalgo.com">SCALGO</a>',
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'<a href="http://www.cgiar-csi.org/data/' +
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'srtm-90m-digital-elevation-database-v4-1">CGIAR-CSI SRTM</a>'
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],
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tileGrid: tileGrid,
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style: 'default',
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dimensions: {
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'threshold': 100
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}
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});
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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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projection: projection,
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center: [-9871995, 3566245],
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zoom: 6
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}),
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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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new TileLayer({
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opacity: 0.5,
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source: wmtsSource
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})
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]
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});
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const updateSourceDimension = function(source, sliderVal) {
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source.updateDimensions({'threshold': sliderVal});
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document.getElementById('theinfo').innerHTML = sliderVal + ' meters';
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};
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updateSourceDimension(wmtsSource, 10);
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document.getElementById('slider').addEventListener('input', function() {
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updateSourceDimension(wmtsSource, this.value);
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});
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