[GRASSLIST:7907] Re: Hutchinson's Adaptive Alogrithm for sound DEMs?
dylan at iici.no-ip.org
Mon Aug 15 12:06:34 EDT 2005
On Sunday 14 August 2005 09:42 pm, Brent Wood wrote:
> (Even though lakes & rivers for breaklines do not really happen on the
> seabed where I do most of my modelling :-)
> I'd like to make more use of GRASS for this, but have found it slow &
> cumbersome to the point of being unuseable when compared with GMT for
> generating DEM's from point data (say 20 million points).
Brent how does the gridding procedure in GMT compare to v.surf.rst ? is speed
being gained over loss in accuracy or flexibility?
> If anyone has any ideas on how to address this & tweak performance I'd be
> grateful, or if there is any specific info I can provide to help in this
there are some nice papers on tweaking the parameters for v.surf.rst and its
kin in the recent GRASS 2002 conference proceedings .
> A sort of "howto create a Spearfish-like DEM from raw point data" ??
Again, one of Helena's papers talks about how to do this, and can be found on
her website  (i have the relevant PDF if you would like it, but i
originally found it here).
Soils and Biogeochemistry Graduate Group
University of California at Davis
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