[GRASS-user] i.ortho.photo

[Alassane Toure]

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.


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