Wednesday, March 28, 2012

Proportional Circle Maps


   These types of maps are similar to dot distribution/dot density maps because they use shapes to depict numerical values on the maps; however, the size of the circle on a proportional circle map is directly related to the data it presents, but not necessarily the area that it is covering. This particular map shows zinc deposits found in a small portion of Canada. The larger dots present a greater amount of zinc found in the soil. A distance scale is shown on the map so that the map reader can determine how much area the map covers and what the actual distance is from circle to circle.

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