shaded relief

GRASS GRASS user
1

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.

Thanks in advance
                Frank

                ----------------------------
       Frank Lederer
       Sandweg 64
       60316 Frankfurt/Main
       Germany

    Lederer@em.uni-frankfurt.de
    phone: ++49-069-4960545
                ----------------------------

2

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.

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