Polymaps – A JS Library For Image & Vector-Tiled Maps

Polymaps is a free JavaScript library for creating dynamic and interactive maps.

Besides the usual cartography from OpenStreetMap, CloudMade, Bing, etc., it works with image-based and vector-tiled maps by providing a quick display of multi-zoom datasets over maps, and supports a variety of visual presentations.

As Polymaps can load data at a full range of scales, it’s a good fit for showing information from country level on down to states, cities, neighborhoods, and individual streets.

And, as it uses SVG to display information, you can use CSS rules to define the design of the data.