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Association of Religion Data Archives
Association of Religion Data Archives: u.s. Population Density Map
Interactive tool that lets you choose a map (Census or Religion), then choose demographic or religious profiles to create a slideshow.
National Council of Teachers of Mathematics
Nctm: Illuminations: State Data Map
Data can be displayed in a variety of ways. This interactive map of the United States shows data by degrees of color. Choose to display data such as: land area, population, population density, gas use, and much more.
University of Richmond
Digital Scholarship Lab: Voting America: White Population Density, 1840 2000
This map shows population change among whites in US counties, 1840 to 2000. Each dot represents 500 people. Corresponding historical events and elections are included for each period of time.
University of Richmond
Digital Scholarship Lab: African American Population Density, 1840 2000
This interactive map shows the African-American population change in U.S. counties from 1840 to 2000. Each dot represents 500 people. Corresponding historical events are included for each period of time.
PBS
Nova: Earth in Peril
A series of nine maps with accompanying explanations. They show how population growth has affected the environment around the world in terms of water availability, climate change, land and forest use, and more. There are both interactive...