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<!DOCTYPE html>
<html>
<head>
<title>KML Ground Overlay as Image Layer - Azure Maps Web SDK Samples</title>
<meta charset="utf-8" />
<meta http-equiv="x-ua-compatible" content="IE=Edge" />
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no" />
<meta name="description" content="This sample shows how to overlay KML Ground Overlay information as an image layer on the map." />
<meta name="keywords" content="map, gis, API, SDK, image, raster, kml, layer, ground overlay, groundoverlay" />
<meta name="author" content="Microsoft Azure Maps" />
<!-- Add references to the Azure Maps Map control JavaScript and CSS files. -->
<link rel="stylesheet" href="https://atlas.microsoft.com/sdk/javascript/mapcontrol/2/atlas.min.css" type="text/css" />
<script src="https://atlas.microsoft.com/sdk/javascript/mapcontrol/2/atlas.min.js"></script>
<script type='text/javascript'>
var map;
//KML Ground Overlay information extracted from: https://commons.wikimedia.org/wiki/File:Chartres.svg/overlay.kml
var overlayInfo = {
url: '../Common/images/image-overlays/1600px-Chartres.svg.png',
north: 48.44820923628113,
south: 48.44737203258976,
east: 1.488833825534365,
west: 1.486788581643038,
kmlRotation: 46.44067597839695
};
function GetMap() {
//Initialize a map instance.
map = new atlas.Map('myMap', {
center: [-122.33, 47.6],
zoom: 12,
view: 'Auto',
//Add your Azure Maps subscription key to the map SDK. Get an Azure Maps key at https://azure.com/maps
authOptions: {
authType: 'subscriptionKey',
subscriptionKey: '<Your Azure Maps Key>'
}
});
//Wait until the map resources are ready.
map.events.add('ready', function () {
//Calculate the corner coordinates of the ground overlay.
var coords = atlas.layer.ImageLayer.getCoordinatesFromEdges(
overlayInfo.north, overlayInfo.south, overlayInfo.east, overlayInfo.west,
//KML rotations are counter-clockwise, subtrack from 360 to make them clockwise.
360 - overlayInfo.kmlRotation
);
//Create an image layer from the ground overlay data and add it to the map.
map.layers.add(new atlas.layer.ImageLayer({
url: overlayInfo.url,
coordinates: coords
}));
//Optionally, calculate the bounds of the coordinates and use it set the map view.
map.setCamera({
bounds: atlas.data.BoundingBox.fromPositions(coords)
});
//Create a style control and add it to the map.
map.controls.add(new atlas.control.StyleControl({
style: 'dark'
}), {
position: 'top-right'
});
});
}
</script>
</head>
<body onload="GetMap()">
<div id="myMap" style="position:relative;width:100%;min-width:290px;height:600px;"></div>
<fieldset style="width:calc(100% - 30px);min-width:290px;margin-top:10px;">
<legend>KML Ground Overlay as Image Layer</legend>
This sample shows how to overlay KML Ground Overlay information as an image layer on the map.
KML ground overlays provide north, south, east, and west coordinates and a counter-clockwise rotation,
where as the image layer expects coordinates for each corner of the image. The KML ground overlay in this sample is of the Chartres cathedral and sourced from <a href="https://commons.wikimedia.org/wiki/File:Chartres.svg/overlay.kml">wikimedia</a>.
</fieldset>
</body>
</html>
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