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Purple Map
Saturday, Nov 6, 2004 - Posted by Rich Miller Below is the Illinois presidential election results map that I inexpertly cropped from Robert J. Vanderbei’s national purple map. Here’s the explanation: Using County-by-County election return data from USA Today together with County boundary data from the US Census’ Tiger database we produced the following graphic depicting the results. Of course, blue is for the democrats, red is for the republicans, and green is for all other. Each county’s color is a mix of these three color components in proportion to the results for that county.  By blowing it up, you appear to see more subtle details.
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