Point Compression Example
Example using the PointCompression Class.
Example
In this example the encoded string “x90uhio4sQmhuGwxrGz8sGp-zP5ooKpx9Eiz7Ip2vFko8E56xEl-zEyhkG” is decoded into an array of Locations. The array of locations is then displayed on the map as a Polyline and map view set accordingly so that we can see what it looks like. To demonstrate and verify the encoding/decoding logic this example then encodes the Locations and compares the two strings to ensure they are the same.
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta charset="utf-8" />
<script type='text/javascript'>
function GetMap() {
var map = new Microsoft.Maps.Map('#myMap', {
credentials: ‘Your Bing Maps Key’
});
var encodedString = 'x90uhio4sQmhuGwxrGz8sGp-zP5ooKpx9Eiz7Ip2vFko8E56xEl-zEyhkG';
//Decode the encoded string.
var locs = Microsoft.Maps.PointCompression.decode(encodedString);
//Display the locations as a polyline on the map so we can see what it looks like.
var p = new Microsoft.Maps.Polyline(locs, {
strokeColor: 'red',
strokeThickness: 5
});
map.entities.push(p);
//Set the view of the map over the polyline.
map.setView({ bounds: Microsoft.Maps.LocationRect.fromLocations(locs) });
//Encode the locations.
var newEncodedString = Microsoft.Maps.PointCompression.encode(locs);
//Verify that the encoded string and new encoded string match.
if (encodedString === newEncodedString) {
alert('Correctly encoded locations.');
} else {
alert('Incorrectly encoded locations.');
}
}
</script>
<script type='text/javascript' src='http://www.bing.com/api/maps/mapcontrol?callback=GetMap' async defer></script>
</head>
<body>
<div id="myMap" style="position:relative;width:600px;height:400px;"></div>
</body>
</html>
Running this code will display a Polyline, that is derived from the provided encoded string, on to of the map. In this case it represents a section of the 520 highway in Bellevue, WA.
