This is just a Google Maps Api v3 interface to add-remove and group markers on a map.
(moved from http://code.google.com/p/gmapsmarkermanager)

You may initialize marker manager with following params: group marker icon properties (src, shadow), cell width and height - grouping grid dimentions, threshold - zoom level applies stop grouping markers, sanity - square of a map where user movements do not call grid redraw. All params are optional.



Usage:

  var markerManagerOptions = {
    icon: {
      src: "http://maps.google.com/mapfiles/ms/micons/partly_cloudy.png",
      shadow: "http://maps.google.com/mapfiles/ms/micons/partly_cloudy.shadow.png"
    },
    cell: {
      width: 48,
      height: 96
    },
    threshold: 12,
    sanity: 1.5
  };
  
  var markerManager = new GmapsMarkerManager(map, markerManagerOptions);
  
  var marker = new google.maps.Marker({position: new google.maps.LatLng(-25.363882, 131.044922)}));
  markerManager.addMarker(marker);
  markerManager.removeMarkerByNumber(0);
  



Author: Alexander Kaupanin