I stumbled across a great little pin clustering/aggregation tool for Google Maps. This elegantly solves the problem that many Google Map developers come across which involves having too many pins on the map. Too many pins not only causes the page to load/refresh slow, but looks rubbish as well...

Here is a link to an example screenshot (linked from http://googlegeodevelopers.blogspot.com/2009/04/markerclusterer-solution-to-too-many.html)

markercluster

For more info check out the Google Geo Devlopers blog...

http://googlegeodevelopers.blogspot.com/2009/04/markerclusterer-solution-to-too-many.html

Kudos to the developer for releasing this into the open source (it looks like it was originally used in a commercial product)...

Best wishes,

Daniel

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Daniel Bryant (Director) | Tai-Dev Ltd
www.tai-dev.co.uk - IT Consultancy Services Specialising in JEE, Web 2.0 and RDBMS