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
78 lines
2.5 KiB
JavaScript
78 lines
2.5 KiB
JavaScript
import Map from 'ol/Map';
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import View from 'ol/View';
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import {defaults as defaultControls, ScaleLine} from 'ol/control';
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import ImageLayer from 'ol/layer/Image';
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import {fromLonLat} from 'ol/proj';
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import Projection from 'ol/proj/Projection';
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import ImageWMS from 'ol/source/ImageWMS';
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import {register} from 'ol/proj/proj4';
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import proj4 from 'proj4';
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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('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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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: '© <a href="http://www.geo.admin.ch/internet/geoportal/' +
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'en/home.html">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: '© <a href="http://www.geo.admin.ch/internet/geoportal/' +
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'en/home.html">National parks / geo.admin.ch</a>',
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params: {'LAYERS': 'ch.bafu.schutzgebiete-paerke_nationaler_bedeutung'},
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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([
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new ScaleLine()
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]),
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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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