British Road Casualties 2008 & 2009
Google Maps built with Fusion Tables can support huge amounts of data and can also now support spatial queries. This Google Map of British Road Casualties is an excellent example of a map using Fusion Tables to great effect.
The map shows the location of nearly 50,000 fatal and serious injuries on British roads for 2008 & 2009. The map also makes great use of queries. It will load the nearest 100 results for any searched location and the map also reloads the nearest markers on the fly as you pan the map around.
As well as these spatial queries it is possible to query the results shown by year of serious injury or fatality.