Source:http://personal.frostburg.edu/krtopping0/maps.htm
-Proportional Cricel Maps are used for showing a quantity (such as the population of a country) that can be divided into parts (such as different ethnic groups). A circle is drawn to represent the total quantity. It is then divided into segments proportional in size to the components. The actual size of the circle can also be used to represent data. This maps shows the number of people killed in road accidents in Europe in 2000.
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