Three Thematic Maps

A thematic map is a type of map especially designed to show a particular theme connected with a specific geographic area. These maps "can portray physical, social, political, cultural, economic, sociological, agricultural, or any other aspects of a city, state, region, nation, or continent".

Isopleth Map

A line map connecting places registering the same amount or ratio
of somegeographical or meteorological phenomenon or phenomena.

http://mapanalysisnoles949.blogspot.com/2008/06/isoline-maps.html

Choropleth Map

A map that uses graded differences in shading or color or the

placing of symbols insidedefined areas on the map in order to

indicate the average values of some property or quantity

in those areas.

http://usopenborders.com/2011/12/mexicos-war-by-the-numbers-maps/

Cartogram Map

A map in which statistical information is shown in

diagrammatic form.

http://geo-mexico.com/?p=1260