A statistical map is a map in which the differences in quantity of a subject is represented according to a specific geographic area. This a statistical map of the mean travel time to work per state.
A cartogram is a map in which some mapping variable is substituted for land area, causing the space of the map to become distorted in order to portray the information of this variable. This is a cartogram of the world population per country.
Flow Maps put in sequence and order a process. They show the relationships between varying stages of an event. This is a flow map on how to make a peanut butter and jelly sandwich.
An isoline map is a 2D representation of a 3D model. It is mapped with continuous lines joining points of the same value. This is a isoline map of temperature and precipitation anomalies in the United States.
Proportional Circle Maps
Choropleth Maps
http://my.ilstu.edu/~jrcarter/Geo204/Choro/Tom/
A choropleth map is a thematic map in which areas are shaded or patterned in proportion to the measurement of the statistical variable being displayed on the map. This is a choropleth map of the Hispanic population by county in the state of Florida.
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.
