Lorenzo Curve

http://www.unc.edu/depts/econ/byrns_web/Economicae/Figures/Lorenz.htm

A Lorenzo Curve line graph shows a probability distribution of statistical values and most of the time show the degree of inequality that exists between two varibles. This map show the distribution of the income in reference to the population as a percentage.

Unstandardrized Choropleth Map

http://www.policemisconduct.net/2010-q3-national-police-misconduct-statistical-report/

A Unstandardrized Choropleth Map is a form of thematic map that depicts data information sets as raw numbers. Instead of is showing the average data it displays the original value. The map above is showing the 2010 3rd quarter county-level police misconduct incidents. Each color interval represents the different raw value data for each area making it a good example of a Unstandardrized Choropleth Map.

Standardized Choropleth Maps

http://www.statcan.gc.ca/pub/92f0138m/2008003/figures/5200001-eng.htm

Standardized Choropleth maps show overall averaged data. So instead of showing the viewer total value, it shows information in a standardized unit, usually in area. Standardized choropleth maps usually are used to show population in form of people per square mile in a state. The map above shows the percentage of population in canada of the age 14 and younger. See how it uses the different shades of green for each state to show the percent of how many people are 14 and younger.

Univariate Choropleth Map

http://www.colocarto.com/custom-thematic-maps.html

A univariate choropleth map is a lot like other choropleth maps except it only displays one variable but still having all the criteria to make it a choropleth map. Its just a simpler map. The map above shows the estimated median household income for 2008 in the United States. The map only displays one variable and uses one shade of color to separate the increases.

Bivariate Choropleth Map

http://proceedings.esri.com/library/userconf/proc99/proceed/papers/pap171/p171.htm

A bivariate choropleth map depicts two different variables on a single map by including two different sets of graphical colors or symbols and combining the different sets of data. The map above does a good job of showing how a bivariate map works, it shows the median house value but at the same time shows the population in 1997.

Range graded Proportional circle map

https://www.e-education.psu.edu/geog486/book/export/html/1796

A range graded proportional circle map is a proportional circle map that uses circles in relation to the different range of data. The data is divided into interval groups and depicted as circles or sometimes other symbols. The different size circles make it easier for the viewer to read the map. The maps above is a good example of a range graded proportional circle map. Its shows the the amounts of motor vehicle deaths in different areas of california. You can see how it makes some symbols larger to show a higher amount of deaths in that area.

Digital Orthopho Quater Quads (DOQQ)

http://www.lib.ncsu.edu/gis/doqq.html

Digital Orthopho Quater Quad maps are created by the USGS. They are digital aerial photos that are have a uniform scale and a resolution of 1 meter. This allows you to use the map directly without any worries of distortion. The photo above shows a aerial infrared DOQQ photo of Johnston County in 1998. You can clearly see its a straight forward photo with no distortion from camera tilt or or the terrain.