shaded relief

Terry Duell duell at
Sun May 24 17:58:57 EDT 1998

Frank Lederer wrote:
> Hello grassers,
> is there anyone, who has experience with a realistic looking shaded relief?
> Do I need a raytracing-tool or is it possible to do it with grass-programms?
> I'm working with a relative 'soft' dem, but when I visualize with
> d.his(dem/aspect), it looks like a high mountain region.
An approach I have used with some success which gives a visually pleasing result
is as follows...
(1) 	apply r.mfilter to your elevation file, using the following filter matrix;
	0 -2 -2
	2  0 -2
	2  2  0
	using a divisor of 1
(2)	apply a greyscale to the output file

See how that works for you.

Terry Duell, Senior Mobility Engineer
Army Technology & Engineering Agency                   
Maribyrnong, Victoria, Australia
ph:61-3-93195837 fax:61-3-93195830

More information about the grass-user mailing list