This site is an animated pyramid graph depicting the population of the US by age and sex from 1950 to 2050. The animation runs continuously. Links to other animations and a homepage are also available. Full description.

This website contains eight maps showing human population density starting in 1 AD. Maps can be viewed as large single maps or as an animation of population change through time. The maps are from a Social Contract article by John H. Hanton, 'End of the Migration Epoch.' Full description.

This site from SERC's Starting Point presents sample Gallery Walk questions for an activity about map reading. These questions encourage students to examine lines of latitude and longitude, read representative fractions, identify landforms on topographic maps, ways to use road, contour, bedrock, soil, satellite, and aerial maps, and how to critique maps. The questions are organized according to the ... Full description.

Flying down Interstate 90 to Sioux Falls, South Dakota using an image from Landsat 7 taken April 22, 1999 Full description.

This animation was created in response to a White House request. It shows the distribution of the 20 million new jobs created since Clinton was in office. Horace Mitchell and Greg Shirah attended the press event where Clinton showed this visualization. Full description.

Showing the urban growth of Washginton, D.C. by dissolving between data collected in 1973, 1980, 1985, 1990, and 1996. Full description.

Starting with a view of the Washington, D.C., metropolitan area, the D.C. border and the Beltway fade in. The view then shifts to Manassas and Woodbridge, Virginia, indicating urban growth with red dots. Data sets for 1973, 1980, 1985, 1990, and 1996 are presented chronologically. Full description.

Starting with a view of the Washington, D.C., metropolitan area, the D.C. border and the Beltway fade in. The view then shifts to Reston and Sterling, Virginia, indicating urban growth with red dots. Data sets for 1973, 1980, 1985, 1990, and 1996 are presented chronologically. Full description.

Starting with a view of the Washington, D.C., metropolitan area, the D.C. border and the Beltway fade in. The view then shifts to Mount Airy, Maryland, indicating urban growth with red dots. Data sets for 1973, 1980, 1985, 1990, and 1996 are presented chronologically. Full description.

Starting with a view of the Washington, D.C., metropolitan area, the D.C. border and the Beltway fade in. The view then shifts to Columbia and Laurel, Maryland, indicating urban growth with red dots. Data sets for 1973, 1980, 1985, 1990, and 1996 are presented chronologically. Full description.