Complete with a comprehensive teacher's guide. Includes links to all kinds of geographic resources. This is a very busy site. And Brent Allison,head of the University of Minnesota's Borchert Map Library, has applied this lesson. His experimental ARL Electronic Atlas techniques can be seen in a demonstration of how census information can be translated into graphical data, then overlaid on maps.
Efforts here map the USA, and several metropolitan areas, to show age and income and housing data.
Download the viewer, and sample maps, and zoom anywhere in the USA,right down to street level. Another demographic map uses colored layers and graphs to present information. A map of Bostonincludes major building outlines, landmarks and hyperlinks to local websites. Metroscope -Same idea as City Net. Not as big, but just as good.