http://www.geog.le.ac.uk/russianheartland/DemographicMaps/images/PopulationMaps/RaionMaps/7RaionPopDenPerCh8902.jpgA Bivariate Choropleth Map shows two different variables using color schemes. It generally us shows spatial difference of two variables along with the geographic differences between the two variables. For instance, the above map compares the population density and the change of density over central Russia. A Bivariate Choropleth Map is usually used to compare data of two variables.
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