Range Graded Proportional Circle Map- a proportional circle map that uses a set number of circles to convey the magnitude of the data. Each circle corresponds to a geographically distinct area.
A range graded proportional circle map uses only a set number of circles, while a continuously graded proportional circle map uses an unlimited number of circles to show the differences in data. In a range graded map, the numbers of data are rounded to make each area fit a set circle. This map shows the German population in the Chicago area, but the data is not conveyed as accurately as it would be with a continuously graded map.
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