Ortho Photo production in GRASS

Henty_Waker · September 14, 1995, 12:00pm

Hi all

I'm interested in producing ortho photo's using GRASS. I hear that it has
the capability, but I have no idea where to start.

I've got a TIFF image file and the parameters for orientation of the
image/photo and a DTM for the area (plain XYZ ascii file). I therefore don't
need to choose control points and don't need to identify fiducial marks etc.

Can anyone tell me if GRASS can do this?

Thanks

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Henty Waker - department of surveying - UCT
e-mail: henty@foxbat.sur.uct.ac.za
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Bart_Cosyn · September 14, 1995, 5:54pm

Hi,

I've got a TIFF image file and the parameters for orientation of the
image/photo and a DTM for the area (plain XYZ ascii file). I therefore don't
need to choose control points and don't need to identify fiducial marks etc.

Importing the image should not be such a problem as you have in grass the
program r.in.tiff. I do not know if it is in the main distribution but in
case not please check incoming on moon. I used it for the same goal and
it worked.

For the DEM! Convert it to sites and run s.surf.tps or s.surf.idw

Hope this helps!