http://tags.library.upenn.edu/tag/census+data+google PennTags Feed http://tags.library.upenn.edu/makerecord/url/3733 http://tags.library.upenn.edu/makerecord/url/3733 The map images as well as the satellite imagery belong to Google and are pulled from maps.google.com. The data is extracted from the 2000 United States Census and can be downloaded from www.census.gov.