[GRASS-user] r.shaded.relief visual banding

[Stuart Gralton]

H Patrick,

I have had banding issues like that with r.shaded.relief when the resolution
of the computational region is set higher than the resolution of the input
elevation data. You can set this with 'g.region res='.

Cheers,
Stuart

On Thu, Nov 18, 2010 at 12:14 AM, Patrick Dolan <pdolan39 at gmail.com> wrote:

> Hello all,
> Are there known issues with "banding" in the output of the r.shaded.relief
> command? When I say banding, I mean the generation of regularly occurring,
> narrow vertical and horizontal lines. I've just created a large shaded
> relief map of the northern Pacific coasts of the USA and Canada from the
> STRM 90m v.4 Arc/Ascii files. At ~380 m intervals, ~30 m bands have been
> generated that crisscross the output. I'd like to know if this is a
> consequence of the STRM 90 data set (notably 3DEM appears to have no similar
> trouble with the same data), or an artifact of the shaded relief command in
> GRASS. I can attach an image if this would help the diagnosis.
>
> Much appreciated,
> Patrick Dolan
> _______________________________________________
> grass-user mailing list
> grass-user at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/grass-user
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.osgeo.org/pipermail/grass-user/attachments/20101118/d5982d31/attachment.html