1r.surf.random(1) GRASS GIS User's Manual r.surf.random(1)
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6 r.surf.random - Produces a raster surface map of uniform random devi‐
7 ates with defined range.
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10 raster, surface, random
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13 r.surf.random
14 r.surf.random --help
15 r.surf.random [-i] output=name [min=float] [max=float] [--over‐
16 write] [--help] [--verbose] [--quiet] [--ui]
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18 Flags:
19 -i
20 Create an integer raster map
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22 --overwrite
23 Allow output files to overwrite existing files
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25 --help
26 Print usage summary
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28 --verbose
29 Verbose module output
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31 --quiet
32 Quiet module output
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34 --ui
35 Force launching GUI dialog
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37 Parameters:
38 output=name [required]
39 Name for output raster map
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41 min=float
42 Minimum random value
43 Default: 0
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45 max=float
46 Maximum random value
47 Default: 100
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50 r.surf.random produces a raster map layer of uniform random deviates
51 whose range can be expressed by the user. It is essentially the same as
52 r.surf.gauss, but uses a linear random number generator instead. It
53 uses the random number generator drand48() or rand(), depending on the
54 user’s platform.
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57 g.region -p n=228500 s=215000 w=630000 e=645000 res=10
58 r.surf.random out=random min=0 max=100
59 # check result
60 r.univar random
61 Figure: Random surface example (min: 10; max: 100)
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63 With the histogram tool the cell values versus count can be shown.
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65 Figure: Histogram of random surface example (min: 10; max: 100)
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68 r.random.surface, r.surf.contour, r.surf.fractal, r.surf.gauss,
69 r.surf.idw, v.surf.rst
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72 Jo Wood
73 Midlands Regional Research Laboratory (ASSIST)
74 University of Leicester
75 October 1991
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78 Available at: r.surf.random source code (history)
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80 Accessed: Mon Jun 20 16:46:31 2022
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82 Main index | Raster index | Topics index | Keywords index | Graphical
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85 © 2003-2022 GRASS Development Team, GRASS GIS 8.2.0 Reference Manual
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89GRASS 8.2.0 r.surf.random(1)