Color relief shading

GRASS GRASS user
1

Dear Grass users

I like to have references regarding "Color relief shading"
technique.

I know how hill shading can be achieved using
grey levels such as developed by B. Horn (1981), but I couldn't find
papers explaining COLOR hill shading algorithms.
My rough guess is the algorithm can be associated with inverse
HSI transform:
               elevation --> hue & saturation

               slope or gray level estimated through relief shading
                         --> intensity

Please let me know if anybody has seen such papers or has ideas.

Thanks in advance

Joong-Sun Won

e-mail: jswon@sari.kordi.re.kr

Geology Lab.
Korean Ocean Research & Development Inst.

2

On Wed, 20 Apr 1994, joongsun wrote:

I like to have references regarding "Color relief shading"
technique.

The best method I have found yet, is to create a shade map with the
shade.rel.sh script in Grass, then use d.his to combine the H of the
elevation map (having chosen a nice colortable of course) and the I of
shade. S is not used. Hope this helps,

P. Martijn van Leusen

Institute of Prehistory, University of Amsterdam
martijn@scanner.frw.uva.nl