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d3-cartogram

This is a JavaScript implementation of an algoritm to construct continuous area cartograms, by James A. Dougenik, Nicholas R. Chrisman and Duane R. Niemeyer, ©1985 by the Association of American Geographers. It relies heavily on d3 for rendering and TopoJSON both for writing and reading topological JSON geodata.

The included example combines TopoJSON-encoded and boundaries of the United States from Natural Earth with 2011 US Census population estimates to size each state proportionally.

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