http://www.pbs.org/wgbh/nova/earth/global-population-growth.html

Trace the dramatic growth of human populations over recent centuries.

http://sedac.ciesin.org/plue

Another CIESIN site (see Chapter 1) with a wealth of demographic data, as related to spatial distribution. It includes remote sensing sources.

http://geography.about.com

This general-interest site discusses GIS and related geographic topics.

http://portal.hud.gov/hudportal/HUD

The home page of the United States Department of Housing and Urban Development is perhaps the best starting point for obtaining information about urbanization in the United States.

http://www.simcity.com

This is the online version of the popular game SimCity, which has players plan and manage their own virtual metropolises. This version has many features not available in the CD form.

http://www.census.gov/geo/maps-data/data/tiger.html

The United States Census Bureau’s TIGER (Topologically Integrated Geographic Encoding and Referencing) map site has an enormous amount of geographic in formation that allows users to print and download standard maps and files as well as those customized on line.

http://www.census.gov/topics.html

Access Census Bureau statistics organized by themes, or topics, such as business and education.

http://www.census.gov/prod/cen2010/briefs/c2010br-01.pdf

Describes population change for the United States, regions, and states between 2000 and 2010.