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Zoom into Clusters

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Note

Bing Maps Web Control SDK retirement

Bing Maps Web Control SDK is deprecated and will be retired. Free (Basic) account customers can continue to use Bing Maps Web Control SDK until June 30th, 2025. Enterprise account customers can continue to use Bing Maps Web Control SDK until June 30th, 2028. To avoid service disruptions, all implementations using Bing Maps Web Control SDK will need to be updated to use Azure Maps Web SDK by the retirement date that applies to your Bing Maps for Enterprise account type. For detailed migration guidance, see Migrate from Bing Maps Web Control SDK and Migrate Bing Maps Enterprise applications to Azure Maps with GitHub Copilot.

Azure Maps is Microsoft's next-generation maps and geospatial services for developers. Azure Maps has many of the same features as Bing Maps for Enterprise, and more. To get started with Azure Maps, create a free Azure subscription and an Azure Maps account. For more information about azure Maps, see Azure Maps Documentation. For migration guidance, see Bing Maps Migration Overview.

This example adds a click event to the clustered pushpins. When clicked, a bounding box is calculated based on the location of the pushpins in the cluster. This bounding box is then used to zoom into the cluster. A padding is added when setting the map view to provide a buffer to account for the pushpin icon pixel size. If it highly possible that when zooming into a cluster that not all individual pushpins will be displayed as some pushpin may form smaller clusters.

<!DOCTYPE html>
<html>
<head>
    <title></title>
    <meta charset="utf-8" />
	<script type="text/javascript">
    var map, clusterLayer;

	function GetMap() {
	    map = new Microsoft.Maps.Map('#myMap',{
	        credentials: 'Your Bing Maps Key',
            zoom: 3
	    });

        Microsoft.Maps.loadModule("Microsoft.Maps.Clustering", function () {
            //Generate 3000 random pushpins in the map view.
            var pins = Microsoft.Maps.TestDataGenerator.getPushpins(3000, map.getBounds());

            //Create a ClusterLayer with options and add it to the map.
            clusterLayer = new Microsoft.Maps.ClusterLayer(pins, {
                clusteredPinCallback: customizeClusteredPin
            });
            map.layers.insert(clusterLayer);
        });
	}

	function customizeClusteredPin(cluster) {
           //Add click event to clustered pushpin
	    Microsoft.Maps.Events.addHandler(cluster, 'click', clusterClicked);
	}

	function clusterClicked(e) {
	    if (e.target.containedPushpins) {
	        var locs = [];
	        for (var i = 0, len = e.target.containedPushpins.length; i < len; i++) {
                //Get the location of each pushpin.
	            locs.push(e.target.containedPushpins[i].getLocation());
	        }

	        //Create a bounding box for the pushpins.
	        var bounds = Microsoft.Maps.LocationRect.fromLocations(locs);

	        //Zoom into the bounding box of the cluster. 
	        //Add a padding to compensate for the pixel area of the pushpins.
	        map.setView({ bounds: bounds, padding: 100 });
	    }
	}
    </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>