79 lines
2.6 KiB
JavaScript
79 lines
2.6 KiB
JavaScript
import ImageLayer from '../src/ol/layer/Image.js';
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import ImageWMS from '../src/ol/source/ImageWMS.js';
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import Map from '../src/ol/Map.js';
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import Projection from '../src/ol/proj/Projection.js';
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import View from '../src/ol/View.js';
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import proj4 from 'proj4';
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import {ScaleLine, defaults as defaultControls} from '../src/ol/control.js';
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import {fromLonLat} from '../src/ol/proj.js';
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import {register} from '../src/ol/proj/proj4.js';
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// Transparent Proj4js support:
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//
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// EPSG:21781 is known to Proj4js because its definition is registered by
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// calling proj4.defs(). Now when we create an ol/proj/Projection instance with
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// the 'EPSG:21781' code, OpenLayers will pick up the transform functions from
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// Proj4js. To get the registered ol/proj/Projection instance with other
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// parameters like units and axis orientation applied from Proj4js, use
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// `ol/proj#get('EPSG:21781')`.
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//
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// Note that we are setting the projection's extent here, which is used to
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// determine the view resolution for zoom level 0. Recommended values for a
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// projection's validity extent can be found at https://epsg.io/.
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proj4.defs(
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'EPSG:21781',
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'+proj=somerc +lat_0=46.95240555555556 +lon_0=7.439583333333333 +k_0=1 ' +
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'+x_0=600000 +y_0=200000 +ellps=bessel ' +
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'+towgs84=660.077,13.551,369.344,2.484,1.783,2.939,5.66 +units=m +no_defs'
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);
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register(proj4);
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const projection = new Projection({
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code: 'EPSG:21781',
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extent: [485869.5728, 76443.1884, 837076.5648, 299941.7864],
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});
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const extent = [420000, 30000, 900000, 350000];
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const layers = [
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new ImageLayer({
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extent: extent,
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source: new ImageWMS({
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url: 'https://wms.geo.admin.ch/',
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crossOrigin: 'anonymous',
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attributions:
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'© <a href="https://shop.swisstopo.admin.ch/en/products/maps/national/lk1000"' +
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'target="_blank">Pixelmap 1:1000000 / geo.admin.ch</a>',
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params: {
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'LAYERS': 'ch.swisstopo.pixelkarte-farbe-pk1000.noscale',
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'FORMAT': 'image/jpeg',
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},
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serverType: 'mapserver',
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}),
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}),
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new ImageLayer({
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extent: extent,
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source: new ImageWMS({
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url: 'https://wms.geo.admin.ch/',
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crossOrigin: 'anonymous',
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attributions:
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'© <a href="https://www.hydrodaten.admin.ch/en/notes-on-the-flood-alert-maps.html"' +
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'target="_blank">Flood Alert / geo.admin.ch</a>',
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params: {'LAYERS': 'ch.bafu.hydroweb-warnkarte_national'},
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serverType: 'mapserver',
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}),
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}),
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];
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const map = new Map({
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controls: defaultControls().extend([new ScaleLine()]),
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layers: layers,
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target: 'map',
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view: new View({
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projection: projection,
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center: fromLonLat([8.23, 46.86], projection),
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extent: extent,
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zoom: 2,
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}),
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});
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