## 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