Unclassed Choropleth Map

http://geoanalytics.net/and/papers/ica01.pdf

An unclassed choropleth map uses shading rather than numerical data on the map in its various areas of the map. Each area is given a color or shade proportionate to its data. The darker the region, the more intense on the scale of data than the lighter regions. This unclassed choropleth map shows the birthrates in Europe through a varying and proportional degree of darkness.

PLSS (Public Land System Survey)

http://www.kitsapgov.com/gis/maplibrary/

A public land system survey is a method used to survey land parcels in the US. It shows boundaries on maps. This survey shows tax ownership, major roads and highways of the area.

Bivariate Choropleth Map

http://rkpjrhist615.wordpress.com/category/geography-310/

Here is an example of a bivariate choropleth map. With these types of maps, we have two variable to analyze. We see that we are trying to make a correlation between unemployment rate per county and the total persons with disabilities. This type of map is extremely handy in that it allows us to look at two very important data sets that wouldn't tell us much if they were to be presented alone. By looking at these two data sets together, we can see if there is high unemployment where there is high disability. This could lead us to make a correlation about whether or not disabilities hinder chances of getting hired. As far as the unemployment data goes, the darker the color, the higher the unemployment rates. With the disability data, the larger the wheelchairs, the higher the disability rates. 

DOQQ (Digital Orthophoto Quarter Quad)

http://www.environment.gov.au/node/21479

A DOQQ map, or Digital Orthophoto Quarter Quads map, is a digital aerial image produced by the USGS. The advantage of a DOQQ map is that it is a spatially accurate image that shows things in their correct geographic locations. This digital picture is an aerial color infrared photograph of Johnston County Nebraska in 1998.

Classed Choropleth Map

http://personal.uncc.edu/lagaro/cwg/color/color_symbol.html

A classed choropleth map shows data in a specific class by coloring in the proportional area on the map. A choropleth map provides an easy way to visualize how a measurement varies across a geographic area. This is a map that shows the amount of expenditure per pupil county by county in North Carolina. If you read the box it actually says that this is a poor exampe of a choropleth map because the hues of color that reperesents the different classes of data are too close together to distinguish. This brings up an interesting point when thinking about class choropleth maps. The idea behind them is to make it much easier to read the graph  visually but the colors have to be distinguishable.

Accumulative Line Graph

http://vlab-resi.tamu.edu/simseg/overview/demog.htm

An accumulative line graph, or Lorenz curve shows the proportion of distribution by a certain percentage of the bottom variable. It shows how far each subset group deviates from the line of equality. In this Lorenz curve, the socioeconomic status of each group is being measured. The further each curve differs from the straight line of equality, the greater the inequality in the groups status distribution.