Click on the links or the images to download the shapefiles. If you could let me know how you are using them, that would help me justify keeping this site up. Also, suggestions and comments welcome.
hardisty@sc.edu
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US Contiguous Counties 1990 Population Cartogram |
In the code used to produce these shapefiles, Michael Gastner asks that you acknowledge the algorithm used to produce these maps as: "Generating population density-equalizing maps", Michael T. Gastner and M. E. J. Newman, Proceedings of the National Academy of Sciences of the United States of America, vol. 101, pp. 7499-7504, 2004.