1r.resample(1)               GRASS GIS User's Manual              r.resample(1)
2
3
4

NAME

6       r.resample  - GRASS raster map layer data resampling capability.
7

KEYWORDS

9       raster, resample, nearest neighbor
10

SYNOPSIS

12       r.resample
13       r.resample --help
14       r.resample input=string output=string  [--overwrite]  [--help]  [--ver‐
15       bose]  [--quiet]  [--ui]
16
17   Flags:
18       --overwrite
19           Allow output files to overwrite existing files
20
21       --help
22           Print usage summary
23
24       --verbose
25           Verbose module output
26
27       --quiet
28           Quiet module output
29
30       --ui
31           Force launching GUI dialog
32
33   Parameters:
34       input=string [required]
35           Name of an input layer
36
37       output=string [required]
38           Name of an output layer
39

DESCRIPTION

41       r.resample resamples the data values in a user-specified  raster  input
42       map  layer name (bounded by the current geographic region and masked by
43       the current mask), and produces a new raster output map layer name con‐
44       taining  the results of the resampling.  The category values in the new
45       raster output map layer will be the same  as  those  in  the  original,
46       except  that  the  resolution  and  extent of the new raster output map
47       layer will match those of the current geographic region  settings  (see
48       g.region).   r.resample  is  intended for resampling of discrete raster
49       data (such as land cover, geology or soil type) to a different  resolu‐
50       tion.   Continuous  data  (such  as  elevation  or temperature) usually
51       require reinterpolation when changing resolution, see r.resamp.interp.
52

NOTES

54       The method by which resampling is conducted is "nearest neighbor"  (see
55       r.neighbors).   The resulting raster map layer will have the same reso‐
56       lution as the resolution of the current geographic  region  (set  using
57       g.region).
58
59       The  resulting raster map layer may be identical to the original raster
60       map layer.  The r.resample program will copy the color table  and  his‐
61       tory file associated with the original raster map layer for the result‐
62       ing raster map layer and will create a  modified  category  file  which
63       contains description of only those categories which appear in resampled
64       file.
65
66       When the user resamples a GRASS reclass file, a true raster map is cre‐
67       ated by r.resample.
68

SEE ALSO

70           g.region,    r.mapcalc,    r.mfilter,    r.neighbors,    r.rescale,
71       r.resamp.interp
72
73       Overview: Interpolation and Resampling in GRASS GIS
74

AUTHOR

76       Michael Shapiro, U.S.Army Construction Engineering Research Laboratory
77

SOURCE CODE

79       Available at: r.resample source code (history)
80
81       Main index | Raster index | Topics index | Keywords index  |  Graphical
82       index | Full index
83
84       © 2003-2020 GRASS Development Team, GRASS GIS 7.8.5 Reference Manual
85
86
87
88GRASS 7.8.5                                                      r.resample(1)