How to cluster graphics

Question

I am drawing hundreds of graphics (points) on a map and it's too slow in IE -- I get the alert asking if you want to stop the script. So I want to cluster the points and draw one for each set that falls within a certain offset. Are there libs and /or techniques readily available for doing this, or do I have to write it myself? I can see it wouldn't be too difficult to do the clustering but then the graphics need to have an infoWindow, so when clicking on a clustered point I need to display the option to view the attributes for each real data point.

Thanks,

nicogis · Answer

esri adds new sample with 3.0: http://help.arcgis.com/en/webapi/javascript/arcgis/help/jssamples/layers_point_clustering.html

StephenLead · Answer

Hi all,

We've updated our site to use the clustering sample - see http://atlas.nsw.gov.au/public/nsw/home/map/national-parks.html

I had to make some tweaks to the sample clustering script, to avoid the infoWindow flicking on/off on mouse hover, but otherwise I'm pretty happy with the way it works.

Let me know if you have any questions.

Cheers,
Steve

derekswingley1 · Answer

I played with this a little but didn't take it too far. I used it in an app that uses web mercator base maps. Maybe someone will find this helpful:  http://swingley.appspot.com/phish