Proportional Circle Map

 

http://personal.frostburg.edu/mtmaier0/maps.htm

The map above is shows the traffic fatalities in the U.S. by state in 2009 in a proportional circle projection.  The size of the circle in each state is significant because the size of the circle shows the amount of  traffic fatalities each state had rather than presenting it in numeric form across the state.  The size of the dots range from the smallest begin deaths recorded under a hundred  to the largest circle which is deaths in the thousands.  Proportional circle maps create an easier way to identify what the viewer needs to know.