[GRASS-user] i.ortho.photo

GRASS GRASS user
1

Dear GRASS users,
I need help on how to use "i.ortho.photo" to orhto-rectify satellite imagery. I am using GRASS in linux (Ubuntu) environment and have already imported all necessary dataset (image to ortho, DEM and reference image). After keying "i.ortho.photo" and selecting the Group, the following step by step process shows up but I am not able to choose any of the options presented.

e[He[2J
i.ortho.photo -- Imagery Group = orthofiles
Initialization Options:
    1. Select/Modify imagery group
    2. Select/Modify imagery group target
    3. Select/Modify target elevation model
    4. Select/Modify imagery group camera
Transformation Parameter Computations:
    5. Compute image-to-photo transformation
    6. Initialize exposure station parameters
    7. Compute ortho-rectification parameters
Ortho-rectification Option:
    8. Ortho-rectify imagery files
RETURN exit
>

Any help is appreciated.

Thanks
Alassane

2

On Wed, Jan 4, 2012 at 1:14 AM, Alassane Toure <atourej@gmail.com> wrote:

Dear GRASS users,
I need help on how to use "i.ortho.photo" to orhto-rectify satellite
imagery.

Unfortunately you can only orthorectify aerial images (they have central
projection while line scanner satellite images have not...).

Sorry for no better answer (we got a new module promised by a researcher
but it hasn't been published yet to my knowledge...).

Markus

PS: Maybe interesting for orthorectificatio of aerial images:

"Robust rectification of aerial photographs in an Open Source environment"
http://dx.doi.org/10.1016/j.cageo.2011.06.002