NAME¶
r.surf.fractal - Creates a fractal surface of a given fractal
dimension.
KEYWORDS¶
raster, DEM, fractal
SYNOPSIS¶
r.surf.fractal
r.surf.fractal help
r.surf.fractal output=
name [
dimension=
float]
[
number=
integer] [--
overwrite] [--
verbose]
[--
quiet]
Flags:¶
- --overwrite
-
Allow output files to overwrite existing files
- --verbose
-
Verbose module output
- --quiet
-
Quiet module output
Parameters:¶
- output=name
-
Name for output raster map
- dimension=float
-
Fractal dimension of surface (2 < D < 3)
Default: 2.05
- number=integer
-
Number of intermediate images to produce
Default: 0
DESCRIPTION¶
r.surf.fractal creates a fractal surface of a given fractal dimension.
Uses spectral synthesis method. Can create intermediate layers showing the
build up of different spectral coefficients (see Saupe, pp.106-107 for an
example of this).
Use this module to generate naturally looking synthetical elevation models
(DEM).
NOTE¶
This module requires the FFTW library for computing Discrete Fourier Transforms.
REFERENCE¶
Saupe, D. (1988) Algorithms for random fractals, in Barnsley M., Devaney R.,
Mandelbrot B., Peitgen, H-O., Saupe D., and Voss R. (1988) The Science of
Fractal Images, Ch. 2, pp.71-136. London: Springer-Verlag.
SEE ALSO¶
r.surf.contour,
r.surf.idw,
r.surf.gauss,
r.surf.random,
r.surf.idw2,
v.surf.idw,
v.surf.rst
AUTHOR¶
Jo Wood, Midlands Regional Research Laboratory (ASSIST), University of Leicester
Last changed: $Date: 2008-12-06 23:39:43 +0100 (Sat, 06 Dec 2008) $
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