[GRASS-user] v.vol.idw

[Benjamin Ducke]

I can only speculate that you are really 
referring to "s.vol.idw" (?)
As the name implies, this is a module that
uses the now outdated "site" data model for its
input data. Some of those modules never made
the transition to GRASS 6 and its new vector engine.
It was still around in GRASS 5.3.
They are generally easy to convert to the new API though.

But perhaps someone on this list knows more about it?

It would certainly be useful to have IDW in voxel space.
IDW is primitive and generally does not give results
as good as spline-based interpolation (unless your data
is very dense and regularly spaced), but it has the advantage
of being simple (so it's easy to make sense of the result
data) and fast.

Ben


On 04/28/2010 12:55 PM, Stefania Merlo wrote:
> Hi,
>
> I was wondering what happened to the above command in the new releases of GRASS. I am quite sure I did use it in GRASS 5 and possibly early versions of 6 but it seems it got lost somewhere along the road. Is there any reason for this? Does anyone remember in what version of GRASS for Mac it was last present? I am in desperate need to use it to interpolate 3d points of subsoil data for comparison with v.vol.rst.
>
> All best
>
> Stefania
>
>
> Stefania Merlo
> Department of Archaeology
> University of Cambridge
> United Kingdom
> sm399 at cam.ac.uk
>
>
>  “Mi piacerebbe che il mio viaggio fosse ancora lungo e costellato di smarrimenti, si mi piacerebbe vivere per molto tempo e commettere ancora mille errori, mille sbagli, ed anche un certo numero di peccati memorabili”! (Amin Maalouf, Il periplo di Baldassarre)
>
>
>
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