r.surf.random
Produces a raster surface map of uniform random deviates with defined range.
r.surf.random [-i] output=name [min=float] [max=float] [seed=integer] [--overwrite] [--verbose] [--quiet] [--qq] [--ui]
Example:
r.surf.random output=name
grass.script.run_command("r.surf.random", output, min=0, max=100, seed=None, flags=None, overwrite=False, verbose=False, quiet=False, superquiet=False)
Example:
gs.run_command("r.surf.random", output="name")
Parameters
output=name [required]
Name for output raster map
min=float
Minimum random value
Default: 0
max=float
Maximum random value
Default: 100
seed=integer
Seed value for the random number generator
Using the same seed ensures identical results, while a randomly generated seed produces different outcomes in each run.
-i
Create an integer raster map
--overwrite
Allow output files to overwrite existing files
--help
Print usage summary
--verbose
Verbose module output
--quiet
Quiet module output
--qq
Very quiet module output
--ui
Force launching GUI dialog
output : str, required
Name for output raster map
Used as: output, raster, name
min : float, optional
Minimum random value
Default: 0
max : float, optional
Maximum random value
Default: 100
seed : int, optional
Seed value for the random number generator
Using the same seed ensures identical results, while a randomly generated seed produces different outcomes in each run.
flags : str, optional
Allowed values: i
i
Create an integer raster map
overwrite: bool, optional
Allow output files to overwrite existing files
Default: False
verbose: bool, optional
Verbose module output
Default: False
quiet: bool, optional
Quiet module output
Default: False
superquiet: bool, optional
Very quiet module output
Default: False
DESCRIPTION
r.surf.random produces a raster map layer of uniform random deviates whose range can be expressed by the user. It is essentially the same as r.surf.gauss, but uses a linear random number generator instead. It uses the random number generator drand48() or rand(), depending on the user's platform.
EXAMPLE
g.region -p n=228500 s=215000 w=630000 e=645000 res=10
r.surf.random out=random min=0 max=100
# check result
r.univar random
Figure: Random surface example (min: 10; max: 100)
With the histogram tool the cell values versus count can be shown.
Figure: Histogram of random surface example (min: 10; max: 100)
SEE ALSO
r.random.surface, r.surf.contour, r.surf.fractal, r.surf.gauss, r.surf.idw, v.surf.rst
AUTHOR
Jo Wood
Midlands Regional Research Laboratory (ASSIST)
University of Leicester
October 1991
SOURCE CODE
Available at: r.surf.random source code
(history)
Latest change: Thursday Mar 06 19:23:31 2025 in commit 5fd4234