Bivariate Choropleth Map

This map shows population density in 2002, and percentage population change from 1989-2002 in Russia's Central Federal District. A bivariate choropleth map displays two variables on a single map by combining two different sets of graphic symbols or colors.

Image Source: http://www.geog.le.ac.uk/russianheartland/DemographicMaps/images/PopulationMaps/RaionMaps/7RaionPopDenPerCh8902.jpg