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. Le jeudi 10 avril 2008 à 18:33 +0200, Markus Neteler a écrit : > On Thu, Apr 10, 2008 at 5:29 PM, Shaun & Melissa Busler > <[EMAIL PROTECTED]> wrote: > > Unfortunately, the focal length of the camera is not on the photo border. > > The photo must be too old. Do you have any recommendations on what focal > > length I should try? It was taken in 1939 for the USDA Agricultural > > Adjustment Administration. > > You could try 150mm or 305mm. In fact, i.ortho.photo is quite robust, > just try and hope that it converges. > > (and/or: Maybe someone on the PROJ4 list knows.) > > Markus > _______________________________________________ > grass-user mailing list > grass-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/grass-user > _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user