[GRASS-user] Region Definition in GRASS

[Hamish]

> Pedro Roma wrote:
> > I'm a kind of a new GRASS user and I'm a bit lost on
> regarding something. REGION (or spatial extent).

Glynn wrote:
> The region is mostly used for raster processing and
> graphical display.
> 
> Most commands which read or write raster maps will use the
> bounds and resolution from the current region. Any input
> maps will be cropped, padded and/or resampled according to
> the region settings.
> 
> Display commands translate geographic or cartographic
> coordinates to display coordinates such that the current
> region just fits inside the display window.
> 
> Vector commands are normally unaffected by the current
> region.

see also
  http://grass.osgeo.org/wiki/GRASS_6_Terminology

and
  http://grass.osgeo.org/grass64/manuals/html64_user/rasterintro.html
  http://grass.osgeo.org/wiki/GIS_Concepts#Raster_Data



Hamish