[GRASS5] Re: d.his r.his question

Markus Neteler neteler at itc.it
Wed Dec 12 09:38:19 EST 2001


(I'm on travel at time)
(I cc to grass5 as this might be of interest)

On Tue, Dec 11, 2001 at 10:41:09AM -0400, Bob Covill wrote:
> Markus;
> I am actaully writing with a question about d.his (and r.his). In the
> past I used a modified version of d.his to create color shaded relief
> maps. In other words I fused a color raster (h_map) with a grey
> sun-illuminated raster (i_map).  The new r.his seems to be (correctly)
> designed for imagery.

yes, d.his and r.his I also use for this purpose. Don't you like the

> The question I have is there another program that I have overlooked for
> combining a color classified raster with a grey shaded raster to create
> a single fused raster? 
For this r.composite is nice. However, due to the speed limitations
in the current GRASS color model, you may avoid to use more than 8000

BTW: Does anyone know the reason for the color limitations? We
shall put this into the bugtracker. I can't recall the reason.

Best regards


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