[GRASS-user] Mosaic

[Nikos Alexandris]

On Fri, 2008-08-08 at 08:57 -0300, Raphael Saldanha wrote:
> Hi!
> 
> A newbie doubt: I have to make a mosaic with 2 satellite images
> (CBERS). The border values are "0". What is the procedure? (the images
> are already on grass).
> 
> Raphael Saldanha
> BRAZIL

Hi Raphael.

If your images are correctly georeferenced then you only need to use
r.patch or r.mapcalc.

Set the extent of the computational region with g.region first, for
example:
g.region rast=satimage1,satimage2 -pa

Then patch:
r.patch in=satimage1,satimage2 out=mosaic

Kind regards, Nikos.