R: [GRASS-user] Profile and tangential curvatures in r.slope.aspect

[Carlos "Guâno" Grohmann]

from the man page of r.slope.aspect:

REFERENCE
Horn, B. K. P. (1981). Hill Shading and the Reflectance Map,
Proceedings of the IEEE, 69(1):14-47.

hope this helps.

Carlos


On 10/11/06, Aldo Clerici <alcl01 at ipruniv.cce.unipr.it> wrote:
>
> Thanks to Brad for the answer.
> I read the paper(s) of Mitasova but they refer to Interpolation by Spline
> (s.surf.tps).
> Does anybody know some paper explaining with more details the use of "..3rd
> order finite difference....." in r.slope.aspect?
> Many thanks again and best regards.
> Aldo Clerici
>
>
> > -----Messaggio originale-----
> > Da: Brad Douglas [mailto:rez at touchofmadness.com]
> > Inviato: martedì 10 ottobre 2006 22.52
> > A: aldo.clerici at unipr.it
> > Cc: grassuser at grass.itc.it
> > Oggetto: Re: [GRASS-user] Profile and tangential curvatures
> > inr.slope.aspect
> >
> > On Tue, 2006-10-10 at 16:29 +0200, Aldo Clerici wrote:
> > > Dear GRASSusers.
> > > Is there a paper (or manual, or tutorial) explaining how
> > profile and
> > > tangential curvatures (pcurv and tcurv)are computed in
> > r.slope.aspect?
> > >
> > > Many thanks in advance
> >
> > You may refer to Helena, et. al, papers titled, "Interpolation by
> > Regularized Spline with Tension".  They can be found on Helena's page
> > (under publications):
> > http://skagit.meas.ncsu.edu/~helena/gmslab/
> >
> > IIRC, it uses 3rd order finite difference weighted by reciprocal of
> > squared distance implemented in a 3x3 moving window.
> >
> >
> > --
> > Brad Douglas <rez touchofmadness com>                    KB8UYR/6
> > Address: 37.493,-121.924 / WGS84    National Map Corps #TNMC-3785
> >
>
>
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-- 
+-----------------------------------------------------------+
              Carlos Henrique Grohmann - Guano
  Geologist M.Sc  - Doctorate Student at IGc-USP - Brazil
Linux User #89721  - carlos dot grohmann at gmail dot com
+-----------------------------------------------------------+
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