nikos.alexandris at felis.uni-freiburg.de
Fri Aug 8 09:09:23 EDT 2008
On Fri, 2008-08-08 at 09:53 -0300, Raphael Saldanha wrote:
> Hi Nikos!
> Thanks for the advice!
> So, I use this:
> Set null values: > r.nul
> Set region: > g.region
> Create mosaic: > r.patch
> On Fri, Aug 8, 2008 at 9:26 AM, Nikos Alexandris
> <nikos.alexandris at felis.uni-freiburg.de> wrote:
> 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
> > (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
> g.region rast=satimage1,satimage2 -pa
> Then patch:
> r.patch in=satimage1,satimage2 out=mosaic
> Kind regards, Nikos.
[cc-ing to the list]
Raphael, it is not required to set any NULL values I think, except if
you need it for your own reasons to set NULL values.
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