[GRASSLIST:4434] Re: shaded relief

[Markus Neteler]

On Fri, Sep 06, 2002 at 08:06:28PM -0700, Eric G. Miller wrote:
> On Fri, Sep 06, 2002 at 09:18:27PM -0500, =?ISO-8859-1?Q?Gustavo Alcides Concheiro P=E9rez?= wrote:
> > 
> > I'm trying to make a shaded relief color image, from a DEM.  I used
> > shade.rel.sh to create a shade raster map, and d.his creates a shaded
> > image from the 2 maps.  Not bad, but I think the shade is to stark.
> > Is there a manipulation I can perform on the shade map that will
> > result in a softer shading?  I tried couple of things with r.mapcalc
> > and r.recode, but the result looked awful :(
> 
> GRASS> shade.rel.sh help
> ...
> Usage:
> shade.rel.sh [altitude=value] [azimuth=value] [elevation=name]
> 
> Well, varying the altitude should change the shading.

You may want to try
altitude=30
azimuth=270

for shade.rel.sh, . For me the d.his result looks nice then (use r.his
to write to file).

Markus