Dot Distribution Map

 

http://cdepart.blogspot.com/2011/02/dot-distribution-map.html

Above is a Dot Distribution map, this type of map uses a distribution of multiple dots to represent a numerical value that can show population, sickness, poverty or any other variable to explain a certain aspect.  Above represents the cumulative AIDs cases as of September of 1997, each point represents 30 cases of aids, with a concentration in the north east region of the United States.