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

[Patrick Dolan]

Thanks, Stuart, but that doesn't appear to be the problem.

Patrick

On 10-11-18 12:51 AM, Stuart Gralton wrote:
> 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 
> <mailto: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 <mailto: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/20101118/87915ec6/attachment.html