Dot Distribution Map

http://go.owu.edu/~jbkrygie/krygier_html/geog_353/geog_353_lo/geog_353_lo08.html

A dot distribution map is a type of map that uses dots to represent the presence of a feature, of a quantity or a phenomenon . It is often used to show populations in a specific area. Here is a dot map representing the total distribution of the Hispanic population in Los Angeles. A blue dot represents a loss of 150 hispanic persons, a red dot represents the gain of 150 hispanic persons.