How to clip image...

[Luis Blanco]

Hi, taravudh...

I got the same problem when i began to use grass. The solution is as follow:

Set the region (your geographic window) to the desired area

        g.region n=<value> s=<value> e=<value> w=<value> res=<value>

check the resolution parameters, in general don´t use it for making clops,
the image (raster file)
get resampled; but it is ok for testing.

         r.mapcalc file.dst=file.src

this command make the crop, other way is:

        r.patch out=file.dst in=file.src,file.src

that is make a patch of a raster with it self.

Hope this help you.

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