composite picture
Schmidt
avenues at sonnet.com
Tue Nov 5 23:46:12 EST 1996
At 10:21 PM 11/5/96 GMT, you wrote:
>hi
>
>i have recently instaled Grass on my Linux Box, and i would like
>to make a composite picture
>I have the 3 files (spot.1 spot.2 spot.3) for the RGB channel
>The probleme is when i run i.composite
>i don t know how to place the files in the directory
>wich directory shall i make , and where to put those 3 files
>
>Thanks
>
>Marc.
>
>--
> Grunberg Marc
>
> DEA Photonique et Image
> Universite Louis Pasteur Strasbourg
>
> grunberg at doc.u-strasbg.fr
> http://saphir.list.jussieu.fr/~marco
> IRC: nick Marco
>
>
Are the SPOT images already rectified and in a .BIL format? If so, you would
first need to create a GRASS mapset and location in the map projection and
coordinate system that matches the SPOT images.
If the images are not rectified, create a GRASS mapset and location with no
map projection (x,y).
Then run i.tape.other to convert each band to a GRASS format. Next, run
i.group to define an imagery group and include all the files in that group.
Finally, run i.composite to create a composite image.
Jim Schmidt
avenues at sonnet.com
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