Source: http://www.e-cartouche.ch/content_reg/cartouche/cartdesign/en/html/ThemMaps_ThemData.html
Range Graded Proportional Circle Maps are very similar to the other proportional circle maps. These maps use the circles to represent data, and vary in size depending on their numerical data, however, when these maps are created, there is a set number of dots that will be used. This map above is presenting the population of the Communes in the Region of Zurich. The dots all have set values, and in this case, they are not equal intervals.
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