I have been trying to figure out for a while now how best to orthorectify historic aerial photographs from around 1940. These photos have fiducials but no camera calibration files. I read on several sites that there are only a couple of open source solutions to achieve this, one of them being GRASS. Over the last few weeks I have been learning how to use GRASS. I have discovered that i.ortho.photo does not work for Windows so I am using GIS-Knoppix. I am beginning to understand how to set up a project in GRASS (on top of learning Linux).
I have a few questions/comments: 1) When is i.ortho.photo going to be available for the Windows binaries? 2) The historic aerial photos do not have camera calibration files. I have searched all over and they do not seem to exist anymore. Is there a way to orthorectify the images without the camera calibration files? Can I make some assumptions? If so, what parameters should I enter? 3) When I tried using photo.2image, I was not prompted with "Look ok? (Y/N)" so I was not able to mark the fiducials. I would appreciate any help! Thanks! Shaun
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