1867. Sanborn Map Company. Digital Sanborn® Maps (1867-1970) delivers detailed property and land-use records that depict the grid of everyday life in more than 12,000 U.S. to... ProQuest Information and Learning.
2000. Oak Ridge National Laboratory and East View Geospatial. Landscan is a world population dataset at approximately 1 km resolution (30" X 30"). It represents an ambient population (average over 24 hours). T... East View Geospatial.