The Farm Security Administration – Office of War Information photographic dataset is a collection of over 170,000 monochrome and colour photographs, commissioned between 1935 and 1945 by the government of the United States of America. Offering a unique snapshot of the nation during the period, it serves as an important visual record for scholars and the public­at­large. The FSA­OWI photographic archive has been digitized by United States Library of Congress, and because the photographs were taken on behalf of the United States Government, access to and use of the collection is essentially free and open. The Photogrammar project takes the conditions of this archive (pre­digitized and publicly accessible) as the starting point for a digital, scholarly and open source platform that builds upon, and significantly extends, the Library of Congress’ online collection.