[GRASS-user] Re: r.mapcalculator / r.mapcalc not producing raster

[LeeDaniel]

With g.region. With the "rast=" argument you can set it to match a raster -
both the spatial extent and the resolution will be set to match.

r.mapcalc uses the regional settings for its calculations, so if the region
is set at a low resolution, or the spatial extent is very small, it could
explain why you're getting such a small raster as a result.
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