Choropleth Map

a Choropleth map uses shading or color to show a trait; e.g., colors indicate altitude; or darker shading indicates more-dense population. Chorpleth Maps are great for showing contrasting information such as rainfall, air temperature, and population density. Viewers can quickly look at the map and see lots of data in a manageable format. This Chorpleth map of Australia breaks down every type of climate represented in Australia and then display the degree of wetness in each climate.





http://www.bom.gov.au/climate/how/newproducts/images/kpn_map.jpg