From the Digital Library of Georgia:
Along with our partners at the University of Georgia Map and Government Information Library (MAGIL), the Digital Library of Georgia has made the Georgia Aerial Photography Index Collection available, now providing online access to more than 1200 indexes produced by U.S. government agencies, including the U.S. Department of Agriculture’s Agricultural Stabilization and Conservation Service (ASCS). Indexes covering all 159 Georgia counties are available with coverage ranging from the 1930s to the 1990s. The Georgia Aerial Photograph Index Collection provides access to digital versions of all Georgia county indexes in MAGIL’s physical collection. Previously-digitized indexes of select counties in the State of Georgia, along with approximately 50,000 black and white photographs, are available in the Georgia Aerial Photographs database.
Aerial photography depicts the physical and cultural characteristics of land at a specific time. The images can provide insights into various fields from ecology and geography to history, archeology, and urban planning. In addition to aiding in the mapmaking process, aerial photographs can be used to settle legal issues such as property disputes and even identify ancestral sites for people researching genealogy, according to the National Archives website.