Unstandardized choropleth maps

http://irap.oxfordjournals.org/content/8/3/279/F4.expansion

Unstandardized  chloropleth maps have no assigned order or specific rank  in displaying data.  Here are Unstandardized  coefficients for structural equation model in different years.

Standardized choropleth maps

http://www.fao.org/docrep/003/T0446E/T0446E06.htm

  Standardized Chloropleth maps to allow comparison of distribution among different areas. Here is a standardized map showing water quantity.

Univariate choropleth maps

http://www.improving-visualisation.org

A univariate map displays a single data set. The example above is a 1904 map showing housing conditions in Manchester and Salford

Bilateral Graph

http://www.mofa.go.jp/policy/oda/category/environment/pamph/2001/oda.html

A bilateral graph is usually  a visualization map, comparing two related variables are identified as well as their overlapping data. The example above displays Japans Corporations Environmental ODA.

Accumulative Line Graph

http://www.vvi.com/

Depicts two data sets usually in the form of a graph. This 21st century example compares four different data sets of apple appliances. 

DLG

http://www.dlg.nsw.gov.au/dlg/dlghome/dlg_Regions.asp?regiontype=1&region=SI

(GIS) DLG are Digital Line Graphs. These data files contain vector information and cartographic representations. Above is data from Sydney, Australia.  

Isotach Maps

http://www.atmos.washington.edu

Usually dealing with meteorology, these maps measure wind speed across a region. As you can see the lines above (contour) connect points of equal wind speeds.