Shaun & Melissa Busler pisze:
Thank you so much for your response! The resources you linked to were very
useful. The Erdas paper is especially good. I never heard of MapAnalyst.
I will have to give it a try.
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?
In one of the links already mentioned [1] there is a couple of hints.
Maybe try asking on some RS-related ML?
I was using photo2.image as part of the i.ortho.photo UI when I was having
the problems. It may be because I am using GIS-Knoppix. If I use GIMP to
measure the fiducial mark coordinates, do I still need to use photo2.image
or do I just use photo.camera?
In GIMP measure fiducial marks coordinates, assuming you have the
resolution of the image set right. In GIMP you can check it in Image >
Print size - if the value there is wrong, set a correct one.
Then, in i.ortho.photo go through steps 1-3. In step 4 enter a name your
camera parameters will be stored under. A dialog pops up for camera
parameters. Once you enter the number of fiducial marks and press
Esc+Enter, you will be prompted with a dialog for their coordinates -
that's where to put values measured in GIMP.
Maciek
[1]http://www.pcigeomatics.com/services/support_center/faqs/oe_general_v10.html#no_fiducial
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