Proportional Circle Map

http://similaritymatrix.blogspot.com/2009/11/continuously-variable-proportional_29.html

Above is a Proportional Circle Map, this map consists of multiple circles in an area in order to create point data.  The circles are in proportion to the variable being depicted and measured, this map can be used to show rates of change, population or currency holding value. The map above shows the leading candidate in the presidential election of 2008.