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r.surf.random

Produces a raster surface map of uniform random deviates with defined range.

raster, surface, random

r.surf.random
r.surf.random --help
r.surf.random [-i] output=name [min=integer] [max=integer] [--overwrite] [--help] [--verbose] [--quiet] [--ui]


Create an integer raster map

Allow output files to overwrite existing files

Print usage summary

Verbose module output

Quiet module output

Force launching GUI dialog


Name for output raster map

Minimum random value
Default: 0

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

Available at: r.surf.random source code (history)

Accessed: unknown

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