On Tue, 10 Sep 2019, Helmut Kudrnovsky wrote:
To save diskspace,, build a virtual raster with your tiles outside GRASS
by GDAL's buildvrt, do r.external yourvirtual.vrt.
No import is needed for raster calculations, r.external to link the virtual
raster works nicely..
regarding to clip a raster to vector extent, there a several ways. One may
be: g.region -a raster=yourraster vector=yourvector followed by a r.mask
vector=yourvector then r.mapcal clippedraster=yourraster
Helmut,
This is exceptionally useful information. I've not looked closely at gdal
and don't know all its capabilities. Perhaps this could be added to the Wiki
as it's likely to be useful to others.
I greatly appreciate the lesson.
Best regards,
Rich
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