(bing) maps: +5000 pinpoints

I am building a map application with the silverlight bing maps control.

In the map control I want to show all of the subscribed customers. The amount of customers is somewhere between 5000 and 7000, this means I can't show them all at once. This would result in a crash I guess.

How would you solve this issue? I've read about events on zoomlevels etc. about tile layers about spatial sql but I have no idea what the right solution is in this situation and where to begin.

This seems like a pretty basic problem when working with maps but there 开发者_如何学Pythonis little to no information on how to handle lots of data when working with bing maps.

Can anyone explain or point me to a good tutorial?

You can use a space-filling-curve or a spatial-index to get those points nested with the zoom-level of your map application to achieve a cluster effect http://blog.notdot.net/2009/11/Damn-Cool-Algorithms-Spatial-indexing-with-Quadtrees-and-Hilbert-Curves. There are many implementation of sfc and hilbert-curves. I've uploaded my own at phpclasses.org (hilbert-curve, bsd licence) and with a quadkey function for a cluster function. I've succesful implemented it for some customers. The idea is to search for a quadkey from left to right to get only a portion of pois. www.maptiler.org uses a quadkey with a z-curve. Probably you are getting better answers at gis.stackexchange. A sfc has usually a constraint of power of 2.