[GRASS-user] Regions and Mapsets

[Glynn Clements]

Rich Shepard wrote:

>    Just to confirm my understanding of regions and mapsets I'll ask this
> final question on the subject. The PERMANENT mapset holds the base data with
> maximum regions for each map. The project mapset has a smaller region, so
> when I'm working within that mapset on copies of the maps stored in
> PERMANENT, all actions are within the smaller region. With raster maps, too,
> like the DEM, all calculations are on the visible portion only. So, when I'm
> finished, the original bounds for each map in PERMANENT remain unchanged. I
> believe that this is correct.

Yes. Any new maps will be created with the bounds and resolution
determined by the current region.

And raster commands don't normally modify existing maps. Some vector
commands modify maps in-place, but raster commands (with very few
exceptions, e.g. r.null) don't.

-- 
Glynn Clements <glynn at gclements.plus.com>