[GRASS-dev] Re: [GRASS-user] Interpolation with faultlines?

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On 22/02/08 10:47, Wolf Bergenheim wrote:

On 22.02.2008 10:54, Moritz Lennert wrote:
>>

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.

It definitely looks interesting and as it is a tcltk library, it should be very easy to integrate this into a grass script module à la r.surf.nnbathy, i.e. export GRASS data to ascii, import into surfit and create surface, export to ascii and import into GRASS.

What do you think, would this maybe be an interesting SoC project, to implement support for fault lines in GRASS?

Why not ? The question is whether this should be a new C-module, an extension to an existing module (v.surf.rst) or a script to integrate surfit. If the latter, it might be a bit weak as a SoC project, but the two former seem right in terms of scale.

Moritz

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On 22.02.2008 11:53, Moritz Lennert wrote:

What do you think, would this maybe be an interesting SoC project, to implement support for fault lines in GRASS?

Why not ? The question is whether this should be a new C-module, an extension to an existing module (v.surf.rst) or a script to integrate surfit. If the latter, it might be a bit weak as a SoC project, but the two former seem right in terms of scale.

I think I like the idea of modifying v.surf.rst, but maybe also r.neighborhood to accept fault lines as vectors. Perhaps also v.surf.idw?

But that might be asking too much, depending on the student. These would maybe be a natural extension. So step one would be to add support to v.surf.rst and then continue with the others.

--Wolf

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<:3 )---- Wolf Bergenheim ----( 8:>