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Demo to use OpenLayers with Finland projection and WMS Aeromagnetic anomalous layer from GTK
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<!DOCTYPE html> | |
<html> | |
<head> | |
<title>Finland Aeromagnetic anomalous map with Proj4</title> | |
<link rel="stylesheet" href="https://openlayers.org/en/v4.6.5/css/ol.css" type="text/css"> | |
<!-- The line below is only needed for old environments like Internet Explorer and Android 4.x --> | |
<script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script> | |
<script src="https://openlayers.org/en/v4.6.5/build/ol.js"></script> | |
<script src="https://cdnjs.cloudflare.com/ajax/libs/proj4js/2.4.4/proj4.js"></script> | |
</head> | |
<body> | |
<div id="map" class="map"></div> | |
<script> | |
var newProjCode = 'EPSG:3067'; | |
proj4.defs('EPSG:3067', '+proj=utm +zone=35 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs'); | |
var newProj = ol.proj.get(newProjCode); | |
var fromLonLat = ol.proj.getTransform('EPSG:4326', newProj); | |
// very approximate calculation of projection extent | |
var extent = ol.extent.applyTransform( | |
[19.08, 58.84, 31.59, 70.09], fromLonLat); | |
newProj.setExtent(extent); | |
var view = new ol.View({ | |
projection: newProj | |
}); | |
var map = new ol.Map({ | |
layers: [ | |
new ol.layer.Tile({ | |
source: new ol.source.OSM() | |
}), | |
new ol.layer.Tile({ | |
source: new ol.source.TileWMS({ | |
url: 'http://gtkdata.gtk.fi/arcgis/services/GTKWMS/GTKWMS/MapServer/WMSServer', | |
crossOrigin: 'anonymous', | |
attributions: '© <a href="http://en.gtk.fi/informationservices/interface_services/">Geological Survey of Finland</a>', | |
params: { | |
'LAYERS': 'aeromagneettinen_anomaliakartta', | |
'FORMAT': 'image/png' | |
} | |
}) | |
}) | |
], | |
target: 'map', | |
view: view | |
}); | |
view.fit(extent); | |
map.getLayers().forEach(function(layer) { | |
if (layer instanceof ol.layer.Tile) { | |
var source = layer.getSource(); | |
if (source instanceof ol.source.TileImage) { | |
source.setRenderReprojectionEdges(renderEdgesCheckbox.checked); | |
} | |
} | |
}); | |
</script> | |
</body> | |
</html> | |
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