Cartogram

http://www-personal.umich.edu/~mejn/cartograms/
Cartograms are typically used to depict population but can also be used to display other ratios of information such as spending rates, mortality rates, and consumption rates.

Flow Map

http://www.nhcs.k12.nc.us/parsley/Curriculum/ThinkingMaps.html
Flow maps are used to show the order or process of an event and the relationships of the stages in the process.

Isolines Map

http://regentsprep.org/regents/earthsci/units/mapping/topographic.cfm
Isoline maps are used to represent a three dimensional model on a two dimensional scale. This is done by connecting point of the same value using continuous lines.

Proportional Circle Map

http://www.environmentamerica.org/news/ame/new-report-ranks-states-and-power-plants-mercury-pollution
Proportional Circle Maps use circles to represent different data values or ranges of data values.

Choropleth Map

http://courses.washington.edu/info424/Labs/ChoroplethMap.html
Choropleth Maps are used to describe measurement differences across regions using a color coded system similar to thematic maps.

Dot Distribution Map

http://arapaho.nsuok.edu/~ziehr/virtual/human_wg/agric/guided.html
Dot distribution maps used dots to show the occurrence of an anomaly and rely on the visual scattering to illustrate concentration or lack thereof of the anomaly.

Propaganda Map

http://www.historum.com/general-history/9905-propaganda-maps.html
Propaganda maps are typically used to sway its audience towards a specific opinion of the area depicted. It is speculated that this map was created to change the impression of how Korea was viewed.