The Orange County Archives has numerous sets of aerial photos, each showing all or part of the county. These are mapping photographs, shot looking straight down. Aerial photo series are available for the years 1988, 1980, 1977, 1975, 1970, 1964, 1959, 1955, 1947, 1942 and 1938. A smaller collection of aerial photos of assorted specific locations is also available. All of them are indexed.