Dot Distribution Maps

http://fishesofgeorgia.uga.edu/index.php?page=information/project

A dot distribution map is a map that uses dots or other symbols to represent the presence, quantity, or value of a phenomenon or thing in a specific area. In a dot distribution map, the size of the dots is scaled in proportion to the intensity of the variable. The map above is an example of a dot distribution map of Georgia; the dots in this case represent the richness of freshwater fishes across the state. It includes all fishes that can be encountered within freshwaters of Georgia. They also included a selection of marine fishes that enter freshwater or are commonly encountered within the tidal portions of Georgia's coastal rivers and streams.