A marker clustering library for the Google Maps JavaScript API v3.
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README.md

Please note: This repository is kept for historical purpose only - the current version of marker clusterer is available as part of the v3-utility-library repository.

Marker Clusterer – A Google Maps JavaScript API utility library

A Google Maps JavaScript API v3 library to create and manage per-zoom-level clusters for large amounts of markers. Analytics

Reference documentation

Migrated from the Google Maps JavaScript API utility libraries on Google Code.

Usage

Download or clone markerclusterer.js and images m1.png to m5.png, save images in images folder.

To use your own custom cluster images just name your images m[1-5].png or set the imagePath option to the location and name of your images like this: imagePath: 'customImages/cat' for images cat1.png to cat5.png.

index.html

...

<div id="map-container"><div id="map"></div></div>
<script src="markerclusterer.js"></script>
<script>
    function initialize() {
        var center = new google.maps.LatLng(51.5074, 0.1278);

        var map = new google.maps.Map(document.getElementById('map'), {
          zoom: 3,
          center: center,
          mapTypeId: google.maps.MapTypeId.ROADMAP
        });

        var markers = [];
        var marker = new google.maps.Marker({
            position: new google.maps.LatLng(51.5074, 0.1278)
        });
        markers.push(marker);

        var options = {
            imagePath: 'images/m'
        };

        var markerCluster = new MarkerClusterer(map, markers, options);
    }

    google.maps.event.addDomListener(window, 'load', initialize);
</script>
...

Live Demos

Marker Clusterer Screenshot

Examples page

Contributing

Want to contribute? Check out the contributing guide!

License

Copyright 2014 Google Inc. All rights reserved.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.