87ce763ccb
Previously, the TiledWMS source generated a resolutions array derived from the world extent in meters, to match the default Web Mercator resolutions of the map. This wouldn't work for projections with distance units different than meters. It is better to commit to a default resolutions array where zoom level 0 is the validity extent of the projection (not the Web Mercator world extent!) at a 256 pixel tile size.
65 lines
2.0 KiB
JavaScript
65 lines
2.0 KiB
JavaScript
goog.require('goog.debug.Console');
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goog.require('goog.debug.Logger');
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goog.require('goog.debug.Logger.Level');
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goog.require('ol.Collection');
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goog.require('ol.Coordinate');
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goog.require('ol.Map');
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goog.require('ol.Projection');
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goog.require('ol.View2D');
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goog.require('ol.source.TiledWMS');
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if (goog.DEBUG) {
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goog.debug.Console.autoInstall();
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goog.debug.Logger.getLogger('ol').setLevel(goog.debug.Logger.Level.INFO);
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}
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var epsg21781 = new ol.Projection('EPSG:21781', ol.ProjectionUnits.METERS,
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// Validity extent from http://spatialreference.org
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new ol.Extent(485869.5728, 76443.1884, 837076.5648, 299941.7864));
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ol.Projection.addProjection(epsg21781);
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var extent = new ol.Extent(420000, 30000, 900000, 350000);
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var layers = new ol.Collection([
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new ol.layer.TileLayer({
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source: new ol.source.TiledWMS({
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url: 'http://wms.geo.admin.ch/',
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attributions: [new ol.Attribution(
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'© ' +
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'<a href="http://www.geo.admin.ch/internet/geoportal/en/home.html">' +
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'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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projection: epsg21781,
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extent: extent
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})
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}),
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new ol.layer.TileLayer({
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source: new ol.source.TiledWMS({
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url: 'http://wms.geo.admin.ch/',
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attributions: [new ol.Attribution(
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'© ' +
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'<a href="http://www.geo.admin.ch/internet/geoportal/en/home.html">' +
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'National parks / geo.admin.ch</a>')],
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params: {'LAYERS': 'ch.bafu.schutzgebiete-paerke_nationaler_bedeutung'},
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projection: epsg21781,
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extent: extent
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})
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})
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]);
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var map = new ol.Map({
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// By setting userProjection to the same as projection, we do not need
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// proj4js because we do not need any transforms.
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userProjection: epsg21781,
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layers: layers,
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target: 'map',
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view: new ol.View2D({
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projection: epsg21781,
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center: new ol.Coordinate(660000, 190000),
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zoom: 2
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})
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});
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