1867. Sanborn Map Company. ProQuest Sanborn Maps Geo Edition (1867-1970) provides digital access to thousands of large-scale maps of American towns and cities, searchable by ... 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.