Continuously Variable Proportional Circle Map

http://personal.frostburg.edu/jaelder0/maps.htm

Proportional Circle Maps are another example of dot density maps(using circles to show the presence of some feature), where the point data is mapped with a circle instead of a dot. The size of the circle relates to the measured variable and not necessarily the area over which that variable is measured. Continuously Variable Proportional Circle Maps are accordingly, proportional circle maps that have circles that come in all sizes. The above map is a continuously variable proportional circle map because it conveys information about aggravated assault arrests by state in 2009 using circles to convey its point data, and is continuously variable because the circles on the map come in different sizes.