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. Author manuscript; available in PMC: 2011 Sep 15.
Published in final edited form as: Cartogr J. 2010 May 1;47(2):130–140. doi: 10.1179/000870409X12488753453372

Figure 2. A value-by-alpha map of 2008 US Presidential election results aggregated to the state level.

Figure 2

Here, the equalizing variable is the state population. Data source: USA Today. (recommended size: 1 column)