NAME
r.mode - Finds the mode of values in a cover map within areas assigned the same category value in a user-specified base map.
KEYWORDS
raster,
statistics,
algebra
SYNOPSIS
r.mode
r.mode --help
r.mode base=string cover=string output=string [--overwrite] [--help] [--verbose] [--quiet] [--ui]
Flags:
- --overwrite
- Allow output files to overwrite existing files
- --help
- Print usage summary
- --verbose
- Verbose module output
- --quiet
- Quiet module output
- --ui
- Force launching GUI dialog
Parameters:
- base=string [required]
- Base map to be reclassified
- cover=string [required]
- Coverage map
- output=string [required]
- Output map
r.mode calculates the most frequently occurring value (i. e., mode)
of data contained in a
cover raster map layer for areas assigned
the same category value in the user-specified
base raster map
layer. These modes are stored in the new
output map layer.
The output map is actually a reclass of the base
map.
The base parameter defines an existing raster map layer in the user's
current mapset search path. For each group of cells assigned the same
category value in the base map, the mode of the values assigned
these cells in the cover map will be computed.
The cover parameter defines an existing raster map layer containing
the values to be used to compute the mode within each category of the
base map.
The user should use the results of
r.mode with care.
Since this utility assigns a value to each
cell which is based on global information (i.e., information at spatial
locations other than just the location of the cell itself), the resultant
map layer is only valid if the geographic region and mask settings are
the same as they were at the time that the result map was created.
Results are affected by the current region settings and mask.
Mode of K-factor (erosion) for Spearfish fields:
g.region raster=fields -p
r.mode base=fields cover=soils.Kfactor output=K.by.farm.mode
r.univar K.by.farm.mode
g.region,
r.category,
r.clump,
r.describe,
r.mapcalc,
r.mfilter,
r.neighbors,
r.reclass,
r.stats,
r.statistics,
r.univar
Michael Shapiro,
U.S.Army Construction Engineering Research Laboratory
SOURCE CODE
Available at:
r.mode source code
(history)
Latest change: Thursday Jan 26 14:10:26 2023 in commit: cdd84c130cea04b204479e2efdc75c742efc4843
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GRASS Development Team,
GRASS GIS 8.5.0dev Reference Manual