Aerial Photo Mosaics

Aerial Photo Mosaics were the aerial photo finding aids during the creation and photo revision of the U.S. Geological Survey (USGS) topographic map series. The film is referenced as a series of photo indexes (mosaics), each of which consists of a single-sheet composite of many individual photos. The photos date from the 1937 through 1980, and they were originally acquired by a variety of sources, such as the USGS, Bureau of Land Management, National Park Service, U.S. Air Force, U.S. Navy, and the Army Map Service. This sporadic collection does not follow any specific schedule or pattern.