Choropleth maps

This is a cloropleth map. Cloropleth maps are thematic maps that display ares that are shaded or patterned in proportion to the measurement of the data. Two choropleth map examples are population density and per-capita income. They can also be used for indicating the differences in land use. This is a map of the Czech Republic.
http://geographyfieldwork.com/DataPresentationMappingTechniques.htm