[GRASS-user] Lake modelling using volume interpolation (v.vol.rst and Paraview)

[Markus Neteler]

On Mon, Jul 26, 2010 at 5:27 PM, Craig Wilson <craiging619 at hotmail.com> wrote:
> Hi,
>
> I have been working with GRASS for my Masters project to visualize 3D point
> data of Loch Lomond in Scotland, with carbon levels and temperatures
> measured at 63 points around the lake (at various depths). I can now get
> voxel data for each measured point visualised in Paraview, but have been
> unable to interpolate this data throughout the lake. Would anyone have any
> idea of the process for doing that?
>
> I have depth data for the whole lake (1208 points including on the
> shoreline) plus my own digitised outline (573 points), so I considered using
> the former as a bottom surface and the latter as a top surface in
> r3.out.vtk, but that doesn't work at all, producing an error message.

Please post this error message.

> I have
> also tried v.vol.rst with the carbon file, using the 4th column (containing
> the carbon data) as the w variable as specified, but that just produces a
> blank box in Paraview. Does anyone have any suggestions? Thanks,

Please post the full v.vol.rst command here as well as
v.info -c carbon_file

Markus