r.region(1grass) | GRASS GIS User's Manual | r.region(1grass) |
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]
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)
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© 2003-2020 GRASS Development Team, GRASS GIS 7.8.5 Reference Manual
GRASS 7.8.5 |