[GRASS-user] mosaic raster files

Nikos Alexandris nikos.alexandris at felis.uni-freiburg.de
Thu Jul 2 09:44:09 EDT 2009

> > > use 'g.region rast=tile1,tile2,tile3,tile5' first to
> > > set the computational region to the outside bounds of all
> > > the tiles listed.

> > Something against using g.region's "-a" flag?

> If all tiles are from the same source and of the same type it
> will not be needed, as bounds will line up exactly. The -a flag
> is useful when resampling is not harmful (e.g. before v.to.rast).
> But needlessly resampling is to be avoided.

Right! I forgot to write that I force resolution to be kept as is with

So "g.region -a res=SomeResolution rast=SomeRaster(s)" is ok or

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