[GRASS-user] Orthorectification of Historic Aerial Photographs

[Patton, Eric]

>May it be a stupid suggestion, but did you try to contact anyone at the
>USGS ? perhaps they maintain data from these old times... (here in
>France IGN is always helpful, and can provide answers to such historical
>requests)
>
>Vincent.

Similarly in Canada, provincial Department of Natural Resources frequently 
maintain documents from the original flight transects, sometimes going back 
several decades. I've managed to recover much aerial photo detail by contacting 
these agencies, including fiducial mark coordinates, camera make and focal length,
aircraft altitude, lens type, etc.

It's probably just a matter of tracking down the right federal agency to contact.

~ Eric.