LIDAR

http:// http:// www.valtus.com/gallery/
LIDAR-Laser Image Dectection and Ranging

Nominal Area Choropleth Maps

http://mapmaker.rutgers.edu/355/africa_political.gif

Nominal area choropleth maps are used to display nominal data. This map is geograpical information about Africa. Variation in color is associated with qauntitative data,

Unstandardized Choropleth Maps

http://pubs.usgs.gov/fs/2005/3051/images/2000choropleth

Unstandardized choropleth maps utilize data sets of raw numbers. This one displays the number of water withdrawals by state across the US.

Standardized Choropleth Maps

http://www.socialexplorer.com/pub/maps/images/sample-thematic-map.png
Standardized choropleth maps allow comparison of distribution among different areas.

Univariate Choropleth Maps

www.cdc.gov/pcd/issues/2007/oct/07_0091.htm

Univariate choropleth maps display a single set of data. The one above illustrates poverty in the United States.

Bivariate Choropleth Maps

cristinamazza.blogspot.com/2008/07/bivariate-...

This mapping technique uses color to solve a problem of represented in four dimesions; two dimensiona-longitude and latitiude and two statistical variables.

Unclassed Choropleth Maps

http://www.esds.ac.uk/international/support/user_guides/gisoverview.asp

This technique assigns shadings proportional to the data values so that the choropleth map doe not have to classify the data.