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Traditional maps of election results tend to paint the US as red or blue which hides a number of important factors, most crucially the distribution of the population. They often create a visually skewed impression of reality and leave you wondering how come the Democrats won in 2012 when the map is mostly red! This map uses a technique called value-by-alpha to overlay a second layer which varies transparency by population density. It corrects the map’s message by bringing the areas with more voters into focus and so we see not only how the vote went but where and to what magnitude.
