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Man Pages
r.region(1) GRASS GIS User's Manual r.region(1)

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

raster, metadata, geometry

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]

-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

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

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.

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.

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 the NS direction, -50 in the EW direction):


r.region map=mymap n=n+100 e=e-50 w=w-50 s=s+100

r.support, g.region, v.transform

Glynn Clements
Based upon g.region

Available at: r.region source code (history)

Main index | Raster index | Topics index | Keywords index | Graphical index | Full index

© 2003-2021 GRASS Development Team, GRASS GIS 7.8.6 Reference Manual

GRASS 7.8.6

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