You might try asking that in the gis.stacexchange.com list. There are many
knowledgeable gis-ers there.

On Wed, Feb 9, 2011 at 5:14 AM, Cavazzi, Stefano
<s.cavazzi@cranfield.ac.uk>wrote:

> Hi All,
>
> I am using  RSAGA for the first time trying to extract some land surface
> parameters with "ta_morphometry"  and wondering which method is used by
> ArcGIS to calculate slope, aspect, curvature, ...
>
> Methods:
>                [0] Maximum Slope (Travis et al. 1975)
>                [1] Maximum Triangle Slope (Tarboton 1997)
>                [2] Least Squares Fitted Plane (Horn 1981, Costa-Cabral &
> Burgess 1996)
>                [3] Fit 2.Degree Polynom (Bauer, Rohdenburg, Bork 1985)
>                [4] Fit 2.Degree Polynom (Heerdegen & Beran 1982)
>                [5] Fit 2.Degree Polynom (Zevenbergen & Thorne 1987)
>                [6] Fit 3.Degree Polynom (Haralick 1983)
>
> Which one would suit best a gridded DEM created by spline interpolation
> (I'm using [5])?
>
> Thanks,
> Stefano
>
> Stefano Cavazzi
> PhD Student, National Soil Resources Institute
> School Of Applied Sciences, Cranfield University
>
>        [[alternative HTML version deleted]]
>
> _______________________________________________
> R-sig-Geo mailing list
> R-sig-Geo@r-project.org
> https://stat.ethz.ch/mailman/listinfo/r-sig-geo
>
>

	[[alternative HTML version deleted]]

