1r.surf.fractal(1)             Grass User's Manual            r.surf.fractal(1)
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NAME

6       r.surf.fractal   -  Creates a fractal surface of a given fractal dimen‐
7       sion.
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KEYWORDS

10       raster
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SYNOPSIS

13       r.surf.fractal
14       r.surf.fractal help
15       r.surf.fractal  out=string    [d=float]     [n=integer]     [--verbose]
16       [--quiet]
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18   Parameters:
19       out=string
20           Name of fractal surface raster layer
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22       d=float
23           Fractal dimension of surface (2 < D < 3)
24           Default: 2.05
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26       n=integer
27           Number of intermediate images to produce
28           Default: 0
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DESCRIPTION

31       r.surf.fractal  creates a fractal surface of a given fractal dimension.
32       Uses spectral synthesis method. Can create intermediate layers  showing
33       the  build up of different spectral coefficients (see Saupe, pp.106-107
34       for an example of this).
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36       Use this module to generate  naturally  looking  synthetical  elevation
37       models (DEM).
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NOTE

40       This  module  requires  the FFTW library for computing Discrete Fourier
41       Transforms.
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REFERENCE

44       Saupe, D. (1988)  Algorithms  for  random  fractals,  in  Barnsley  M.,
45       Devaney R., Mandelbrot B., Peitgen, H-O., Saupe D., and Voss R.  (1988)
46       The Science of Fractal Images, Ch. 2, pp.71-136. London:  Springer-Ver‐
47       lag.
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SEE ALSO

50       r.surf.contour,  r.surf.idw,  r.surf.gauss, r.surf.random, r.surf.idw2,
51       v.surf.idw, v.surf.rst jwo@le.ac.uk
52       ASSIST's home
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54       Last changed: $Date: 2007-07-04 07:15:42 +0200 (Wed, 04 Jul 2007) $
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56       Full index
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58       © 2003-2008 GRASS Development Team
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62GRASS 6.3.0                                                  r.surf.fractal(1)