title: How to utilize google map MarkerCluster to catch Polygon rather than marker ?
body: <p>everyone! </p>
  
  <p>How to utilize google map MarkerCluster to catch Polygon rather than Marker ? </p>
  
  <p>My program has about 20,000 markers on Google Map, and it becomes very slow when the data is loading into the map. Then I use JS code to draw one polygon as the replacement of marker. It would run faster. Maybe the PNG image loading for markers exercises negative influence on speed.</p>
  
  <p>Finally, I read this article </p>
  
  <p><a href="http://google-maps-utility-library-v3.googlecode.com/svn/trunk/markerclusterer/docs/examples.html" rel="nofollow">http://google-maps-utility-library-v3.googlecode.com/svn/trunk/markerclusterer/docs/examples.html</a></p>
  
  <p>The function 'MarkerCluster' is great. However, it can be only used on the aspect of Google Marker.</p>
  
  <pre><code>var markerClusterer = new MarkerClusterer(map, **markerArray**)
  </code></pre>
  
  <p>So is there some solution for putting polygon into this cluster mechanism ? </p>
  
  <p>Any help would be greatly appreciated !</p>