Cartograms

http://inhabitat.com/worldmapper-cartogramps-revisualize-the-world/

A cartogram map is a map created by substituting a different standard of measurement for distance or area. Many times the area or space is distorted to convey the information. This map is a cartogram of the CO2 emissions in 2000. The size of the country is directly proportional to the emission of CO2 the country produces. The United States, China, and India are large contributors to the CO2 emission while Australia and most of Africa release little CO2 emission.

Flow Map

http://geography-student.blogspot.com/2011/12/apologisesfor-being-on-quiet-side-with.html
Flow maps show the linear movement between places. The width of the flow lines is proportional to the quantity. In regards to location and travel path, flow maps only show the general direction, not the actual path. This map displays the major international trade movements in crude oil in 1999. A large amount was distributed out of Saudia Arabia.

Isoline Maps

http://regentsprep.org/Regents/core/questions/questions.cfm?Course=ESCI&TopicCode=07

An isoline map conveys the numerical value for continuous distributions by means of lines joining points of the same value. This isoline map displays the average annual precipitation in New York for the past twenty five years.

Proportional Circle Map

https://www.e-education.psu.edu/natureofgeoinfo/book/export/html/1553

In a proportional circle map the size of the circle is directly proportional to the value of the data. In this map, the Hispanic population in the United States is displayed. The variation in the size of dots is related to the population of Hispanics. California has a high amount of Hispanics while Alaska has a very small dot representing a very small Hispanic population.

Dot Distribution Map

http://www.nrcs.usda.gov/wps/portal/nrcs/detail/null/?cid=nrcs143_013772

A dot distribution map uses dots to describe a specific quantity of a given variable. The goal of a dot distribution is to provide a visual image in the variation in the density of a distribution. This map displays the acres of non-federal wetlands in 1992. It can be seen that along the coast of the south east there is a high concentration of non-federal wetlands.

Thematic Map

http://www.colocarto.com/custom-thematic-maps
Thematic maps display information about a certain topic rather than display terrain. Variables can easily be compared due to a common theme. This map a thematic map in that it displays the estimated median household income in 2008 in the United States. This particular map could also be considered a choropleth map.

Planimetric map

http://www.geocraft.com/WVFossils/Penn_planimetric_map.html
A planimetric map is a surface map with no relief features. Street maps are a common example of a planimetric map. This planimetric map displays the ancient continents of Laurussia and Gondwana.