[GRASS-user] Interpolation with faultlines?

[Maciej Sieczka]

Moritz Lennert pisze:
> On 13/02/08 18:40, G. Allegri wrote:
>> It's the same question I was going to ask. It would be an important
>> advance in Grass, as I'm obliged to use commercial sw to do it (Esri)
>> both to interpolate with barriers and to do 3D TINs with constraints.

> The answer was (and as far as I know still is) to either run v.surf.rst 
> several times, once for each part within fault lines (using mask) or to 
> use r.surf.nnbathy (AddOns).

r.surf.nnbathy does not support fault lines either.

FWIW, there is surfit [1] (FOSS). It supports fault lines AIUI - linear 
features which don't have a value assigned, but only depict a curve at 
which the interpolation should break. They call break/fault lines 
"inequalities". I still haven't used surfit, but from examples [2] it 
seems interesting.

[1]http://surfit.sourceforge.net
[2]http://surfit.sourceforge.net/surfit/examples.html

Maciek