[GRASS-user] r.mask vs g.region

[Rich Shepard]

On Wed, 11 Jul 2018, Moritz Lennert wrote:

> See also the general raster info: 
> https://grass.osgeo.org/grass74/manuals/rasterintro.html which explains that:
>
> 1.    Raster output maps have their bounds and resolution equal to those of 
> the current computational region.
> 2.    Raster input maps are automatically cropped/padded and rescaled (using 
> nearest-neighbour resampling) to match the current region.
> 3.    Raster input maps are automatically masked if a raster map named MASK 
> exists. The MASK is only applied when reading maps from the disk.
>
> In other words: the MASK only applies for reading. For a given region and 
> MASK, interpolation will happen for the entire region, but only using raster 
> input data which falls within the MASK (vector input data is read from the 
> entire region generally). If you erase the MASK, you will see that the result 
> of interpolation (and other raster commands) covers the entire region.

Moritz,

   Thank you.

Regards,

Rich