NAME

       r.region  - Sets the boundary definitions for a raster map.

KEYWORDS

       raster, metadata

SYNOPSIS

       r.region
       r.region --help
       r.region   [-cda]   map=name    [region=name]    [raster=name]    [vector=name]    [n=value]    [s=value]
       [e=value]   [w=value]   [align=name]   [--help]  [--verbose]  [--quiet]  [--ui]

   Flags:
       -c
           Set from current region

       -d
           Set from default region

       -a
           Auto-adjustment for lat/lon
           Attempt to fix small precision errors in resolution and extents

       --help
           Print usage summary

       --verbose
           Verbose module output

       --quiet
           Quiet module output

       --ui
           Force launching GUI dialog

   Parameters:
       map=name [required]
           Name of raster map to change

       region=name
           Set region from named region

       raster=name
           Set region to match this raster map

       vector=name
           Name of vector map
           Set region to match this vector map

       n=value
           Value for the northern edge

       s=value
           Value for the southern edge

       e=value
           Value for the eastern edge

       w=value
           Value for the western edge

       align=name
           Raster map to align to

DESCRIPTION

       The r.region program allows the user to manage the boundaries of a raster map. These  boundaries  can  be
       set  by the user directly and/or set from a region definition file (stored under the windows directory in
       the user’s current mapset), a raster or vector map, or a 3dview file.

       The align parameter sets the current resolution equal to that of the named  raster  map,  and  align  the
       boundaries  to  a  row  and  column  edge in the named map.  Alignment only moves the existing boundaries
       outward to the edges of the next nearest cell in the named raster map -- not to the  named  map’s  edges.
       To perform the latter function, use the raster=name option.

NOTES

       After  all  updates  have  been  applied,  the  raster  map’s resolution settings are recomputed from the
       boundaries and the number of rows and columns in the raster map.

       The n=value may also be specified as a function of its current value:  n=n+value  increases  the  current
       northing, while n=n-value decreases it.  This is also true for s=value, e=value, and w=value.

EXAMPLES

       Assign absolute coordinates to map:
       r.region map=mymap n=220750 s=220000 w=638300 e=639000
       Shift map (using offset, here by 100 map units in two directions):
       r.region map=mymap n=n+100 e=e+100 w=w+100 s=s+100

SEE ALSO

        r.support, g.region, v.transform

AUTHOR

       Glynn Clements
       Based upon g.region

SOURCE CODE

       Available at: r.region source code (history)

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       © 2003-2019 GRASS Development Team, GRASS GIS 7.8.2 Reference Manual