Dot Distribution Map

Dot Distribution Map

http://www.census.gov/geo/www/mapGallery/2kpopden.html

A Dot Distribution Map is defined as a map type that uses a dot symbol to show the presence of a feature. Dot maps rely on a visual scatter to show spatial pattern. They are often used in depicting the populous, as seen with this map of the 2000 population distribution of the United States.