[GRASSLIST:2391] RE: Sun illuminated bathymetry

[CHAN Kenneth]

> I have a digital terrain model derived from bathymetry data which I
> have imported into grass.
> 
> I would like to be able to generate and view a sun-illuminated view of
> the data. 

Gordon, 

You might want to check out shade.rel.sh, which is described in the shell
script command reference manual.  I use the script to generate sun shaded
relief images of level 1 DTED data.  In its current form, I found the script
a bit sensitive to small variations in elevation.  In my case, the generated
images contains features that look like "steps" where the steps are caused
by an elevation difference of 1 unit (1 metre).

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Kenneth Chan
Software Developer, Simulation Group
Systems Division, Tenix Defence PTY LTD