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/****************************************************************************
*
* MODULE: r.random.surface
* AUTHOR(S): Charles Ehlschlaeger, Michael Goodchild, and Chih-chang Lin;
* (National Center for Geographic Information and
* Analysis, University of California, Santa Barbara)
* (original contributors)
* Markus Neteler <neteler itc.it>,
* Bernhard Reiter <bernhard intevation.de>,
* Brad Douglas <rez touchofmadness.com>,
* Glynn Clements <glynn gclements.plus.com>,
* Jachym Cepicky <jachym les-ejk.cz>,
* Jan-Oliver Wagner <jan intevation.de>
* PURPOSE: generates a spatially dependent random surface
* COPYRIGHT: (C) 2000-2008 by the GRASS Development Team
*
* This program is free software under the GNU General Public
* License (>=v2). Read the file COPYING that comes with GRASS
* for details.
*
*****************************************************************************/
/* main.c */
#include <stdlib.h>
#include <stdio.h>
#include <grass/gis.h>
#include <grass/raster.h>
#include <grass/glocale.h>
#include "ransurf.h"
#include "local_proto.h"
BIGF BigF;
double **RSurface, NS, EW, FilterSD, AllMaxDist, *Norm;
int MapCount, FDM, Rs, Cs, Theory;
CELL *CellBuffer;
FILTER *AllFilters, Filter;
CATINFO CatInfo;
int *Seeds, Seed, NumSeeds, Low, High, NumMaps, NumFilters, OutFD;
char Buf[240], **OutNames, *TheoryName, *Mapset;
struct Flag *Uniform;
struct Option *Distance, *Exponent, *Weight;
struct Option *Output;
struct Option *range_high_stuff;
struct Option *SeedStuff;
int main(int argc, char **argv)
{
struct GModule *module;
int DoMap, DoFilter, MapSeed;
G_gisinit(argv[0]);
module = G_define_module();
G_add_keyword(_("raster"));
G_add_keyword(_("surface"));
G_add_keyword(_("random"));
module->description =
_("Generates random surface(s) with spatial dependence.");
Output = G_define_option();
Output->key = "output";
Output->type = TYPE_STRING;
Output->required = YES;
Output->multiple = YES;
Output->description = _("Name for output raster map(s)");
Output->gisprompt = "new,cell,raster";
Distance = G_define_option();
Distance->key = "distance";
Distance->type = TYPE_DOUBLE;
Distance->required = NO;
Distance->multiple = NO;
Distance->description =
_("Maximum distance of spatial correlation (value >= 0.0)");
Distance->answer = "0.0";
Exponent = G_define_option();
Exponent->key = "exponent";
Exponent->type = TYPE_DOUBLE;
Exponent->multiple = NO;
Exponent->required = NO;
Exponent->description = _("Distance decay exponent (value > 0.0)");
Exponent->answer = "1.0";
Weight = G_define_option();
Weight->key = "flat";
Weight->type = TYPE_DOUBLE;
Weight->multiple = NO;
Weight->required = NO;
Weight->description =
_("Distance filter remains flat before beginning exponent");
Weight->answer = "0.0";
SeedStuff = G_define_option();
SeedStuff->key = "seed";
SeedStuff->type = TYPE_INTEGER;
SeedStuff->required = NO;
SeedStuff->description = _("Random seed, default [random]");
range_high_stuff = G_define_option();
range_high_stuff->key = "high";
range_high_stuff->type = TYPE_INTEGER;
range_high_stuff->required = NO;
range_high_stuff->description = _("Maximum cell value of distribution");
range_high_stuff->answer = "255";
Uniform = G_define_flag();
Uniform->key = 'u';
Uniform->description = _("Uniformly distributed cell values");
if (G_parser(argc, argv))
exit(EXIT_FAILURE);
Init();
if (Uniform->answer)
GenNorm();
CalcSD();
for (DoMap = 0; DoMap < NumMaps; DoMap++) {
OutFD = Rast_open_c_new(OutNames[DoMap]);
G_message(_("Generating raster map <%s>..."), OutNames[DoMap]);
if (Seeds[DoMap] < 0)
G_srand48_auto();
else
G_srand48(Seeds[DoMap]);
MapSeed = Seed = Seeds[DoMap];
ZeroMapCells();
for (DoFilter = 0; DoFilter < NumFilters; DoFilter++) {
CopyFilter(&Filter, AllFilters[DoFilter]);
G_debug(1,
"Starting filter #%d, distance: %.*lf, exponent: %.*lf, "
"flat: %.*lf",
DoFilter, Digits(2.0 * Filter.MaxDist, 6),
2.0 * Filter.MaxDist, Digits(1.0 / Filter.Exp, 6),
1.0 / Filter.Exp, Digits(Filter.Mult, 6), Filter.Mult);
MakeBigF();
CalcSurface();
}
SaveMap(DoMap, MapSeed);
}
G_done_msg(" ");
exit(EXIT_SUCCESS);
}
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