The American Geographical Society Library Digital Map Collection contains over 14000 maps, ranging from early maps of Asia to historical maps of Wisconsin and Milwaukee, and other American cities, states, and national parks.
The David Rumsey Map Collection contains more than 150,000 maps, ranging in date from about 1550 to the present. The collection focuses on rare 16th through 21st century maps of North and South America, as well as maps of the World, Asia, Africa, Europe, and Oceania.
The American Geographical Society (AGS) advances and promotes geography in all sectors in order to enhance the nation’s geographic literacy for sound public policy, national security, and human well-being worldwide.
The American Society for Photogrammetry and Remote Sensing (ASPRS) advances knowledge, improves understanding, and promote the application of photogrammetry, remote sensing, and geographic information systems.
The National Geographic Society (NGS), one of the largest non-profit scientific and educational institutions in the world, promotes the conservation of the world's cultural, historical, and natural resources.