[GRASS-user] How to copy more raster layers to one layer

[Hamish]

> Téglásy Örs schrieb:
> > I have several raster layers containing DEM data for an area of 1*1 
> > degree each. I would like to "copy"  those layers together having
> > just  one dem raster layer for the whole area. I started with
> > r.mapcalculator  using expressions like  "max(A, ... , F) " or 
> > A+...+F, but I always got  an empy layer probably because the
> > rasters dont overlap each other. Any  idea how to do that? Shouldn't
> > be too difficult...

Wolfgang[, Laurent] wrote:
> you can try r.patch input=mapA,mapB output=result


tip o' the day:

It's also useful to use g.region's multiple rast= capability to expand
the region to the extent of all maps automatically:

MAPS=`g.mlist pattern="srtm_*" sep=,`
g.region rast=$MAPS
r.patch in=$MAPS out=srtm_mosaic



Hamish