Roger Mason wrote: > > why not takeing real DEMs? The SRTM dataset is for free and can be > > used with grass. > > Because I want to make specific landscape shapes. It would be an > immense labour to search the archive of DEM's to find what I want.
Another idea is to use r.mapcalc to make a gaussian bell etc. > > take a look at r.surf.fractal which is creating synthetic DEMs > > for you. > > I have GRASS installed on two machines. r.surf.fractal worked fine on > my machine at home (6.2.1) but does not exist on my work machine (also > 6.2.1). In both cases GRASS was installed from source. Can you tell > me what libraries r.surf.fractal depends on so I can figure out how to > re-configure and re-build? GRASS needs to be built with FFTW support for r.surf.fractal to work. Note about that just added to the help page. dev: I notice frac.h still defines prototypes for some fns which are now taken from the fftw lib, and does not #include any fftw headers, or even <grass/gmath.h>. ?? CVS log of switch to FFTW: http://freegis.org/cgi-bin/viewcvs.cgi/grass/src/raster/r.surf.fractal/Attic/fft.c Hamish _______________________________________________ grassuser mailing list [email protected] http://grass.itc.it/mailman/listinfo/grassuser
