Various high resolution historic aerial photograph overlays for various cities. I will continue to add additional locations as I have time.
The collection currently includes the following:
Los Angeles 1948 (Aerials from USGS)
New York City 1954 (Aerials from USGS)
Oakland, California 1948 (Aerials from USGS)
Chicago, 1938 (Aerials from Illinois Natural Resources Geospatial Clearinghouse)
Los Angeles Intl Airport, 1938, 1945, 1952, 1963, 1985 and 1992