Over at Soul Solutions they have a great article which talks about how to cluster a million points on Virtual Earth using AJAX & .NET.

You can download all the source code from their article.

The key bit are:

  • Presentation Layer - .NET Web Form - calls are made to the Business Layer using AJAX.
  • Business Layer - Web Service and also holds the clustering logic
  • Data Layer - configuration - in this example is an XML file.

not clustered clustered

Check out the article here.

Other great stuff from Soul Solutions: