r.surf.random(1grass)

r.surf.random1grass

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

Usage

r.surf.random

r.surf.random --help

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

Keywords

raster, surface, random

Overview

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.

Examples

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)

Source code

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

Accessed: Monday Feb 24 17:50:54 2025

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© 2003-2025 GRASS Development Team, GRASS GIS 8.4.1 Reference Manual

Releases

10 releases since Debian 4.0 (Etch); the text changed 9 times.

  1. 4.0
  2. 5.0
  3. 6.0
  4. 7
  5. 8
  6. 9
  7. 10
  8. 11
  9. 12
  10. 13

Author

Jo Wood
Midlands Regional Research Laboratory (ASSIST)
University of Leicester
October 1991

From grass-doc 8.4.1-1 in Debian 13 (Trixie). Parsed by carta from the page's man source.