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NAME
r.resample - GRASS raster map layer data resampling capability.
KEYWORDS
raster, resample
SYNOPSIS
r.resample
r.resample help
r.resample [-q] input=string output=string [--overwrite] [--verbose] [--quiet]
Flags:
- -q
- Quiet
- --overwrite
- Allow output files to overwrite existing files
- --verbose
- Verbose module output
- --quiet
- Quiet module output
Parameters:
- input=string
- Name of an input layer
- output=string
- Name of an output layer
DESCRIPTION
r.resample resamples the data values in a user-specified raster
input map layer name (bounded by the current geographic region
and masked by the current mask), and produces a new raster output map layer
name containing the results of the resampling.
The category values in the new raster output map layer will be the same
as those in the original, except that the resolution and extent of the
new raster output map layer will match those of the current geographic region
settings (see g.region).
r.resample is intended for reinterpolation of continuous data
to a different resolution rather than for interpolation from scattered data
(use the v.surf.* modules for that purpose).
NOTES
The method by which resampling is conducted is "nearest neighbor"
(see r.neighbors).
The resulting raster map layer will have the same
resolution as the resolution of the current geographic region
(set using g.region).
The resulting raster map layer may be identical to the original raster
map layer. The r.resample program will copy the color table
and history file associated with the original raster map
layer for the resulting raster map layer and will create a modified
category file which contains description of only those categories
which appear in resampled file.
When the user resamples a GRASS reclass file, a true raster map
is created by r.resample.
SEE ALSO
g.region,
r.mapcalc,
r.mfilter,
r.neighbors,
r.rescale
AUTHOR
Michael Shapiro,
U.S.Army Construction Engineering Research Laboratory
Last changed: $Date: 2008-05-16 12:09:06 -0700 (Fri, 16 May 2008) $
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