Note: This document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade, and read the current manual page.
NAME
r.surf.random - Produces a raster surface map of uniform random deviates with defined range.
KEYWORDS
raster,
surface,
random
SYNOPSIS
r.surf.random
r.surf.random --help
r.surf.random [-i] output=name [min=float] [max=float] [--overwrite] [--help] [--verbose] [--quiet] [--ui]
Flags:
- -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
- --ui
- Force launching GUI dialog
Parameters:
- output=name [required]
- Name for output raster map
- min=float
- Minimum random value
- Default: 0
- max=float
- Maximum random value
- Default: 100
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.
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)
r.random.surface,
r.surf.contour,
r.surf.fractal,
r.surf.gauss,
r.surf.idw,
v.surf.rst
Jo Wood
Midlands Regional Research Laboratory (ASSIST)
University of Leicester
October 1991
SOURCE CODE
Available at:
r.surf.random source code
(history)
Latest change: Monday Feb 27 13:45:25 2023 in commit: a82501dc85294207e8e58437c3ec7f1056465ed4
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GRASS Development Team,
GRASS GIS 8.3.3dev Reference Manual