The million-marker map is an experimental set of Flash and JavaScripts add-ons to the Google Maps API that allows you to display and interact with very large data sets on a regular Google map. The map also offers a way to select markers with a paintbrush; you can geographically constrain queries by painting a region on the map, like using the QuickMask tool in Photoshop.

gmaps & canvas, presumably. no workie on ff3

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