[Therion] Calculation of cave volume

[Enrico Fratnik]

Dear Bill,

   attached you can find the screenshots of the steps I have described.

Hope this can help you

enrico

On Thu, Jan 27, 2022 at 3:23 PM Bill Gee <bgee at campercaver.net> wrote:

> Hi Enrico -
>
> Just to see what this method would produce, I installed both Paraview and
> MeshLab on my Fedora 35 system.  I opened a .lox file of the cave in Loch
> (which displays a 3d rendering of the cave) and then exported it to a .vtk
> file.  I opened the .vtk file in Paraview.  It shows nothing.  I cannot
> find the export function.  The Save data feature does not offer x3d as a
> file type.
>
> In Paraview the Information tab says there are zero cells, zero points and
> zero memory used.  The x-, y- and z-range are "not available".
>
> The .vtk file exists and is about 16k bytes (it is a small cave).
>
> Am I missing something?
>
> ========
> Bill Gee
>
>
> On Thursday, January 27, 2022 7:52:57 AM CST Enrico Fratnik wrote:
> > Hi Bill,
> >
> >    normally I export the VTK model of the cave from LOCH then I open it
> > with ParaView
> > With ParaView I export the model in x3d format and I open it with MeshLab
> > where I use the filter "Surface Reconstruction: Screened Poisson" with
> > pre-clean option active
> > After that with the filter "Compute Geometric Measures" you can retrieve
> > the volume on the log view.
> >
> > My big issue is which model is better to export with therion in order to
> > obtain an acceptable volume: the one with "-wall-source splays" or with
> > "-wall-source maps"?
> >
> > Hope this helps
> >
> > good caves to everyone
> >
> > enrico
> >
> > On Thu, Jan 27, 2022 at 1:37 PM Bill Gee <bgee at campercaver.net> wrote:
> >
> > > Hello everyone -
> > >
> > > Several years ago I made a map of a small cave.  Among the data that
> was
> > > calculated was an estimation of the volume of the cave.  I need to find
> > > that information again, but it has so far eluded me.  I thought it was
> in
> > > therion.log along with other statistics like length and bounding box
> > > dimensions, but now I do not find it there.  The estimation was based
> on
> > > solids calculated from centerline and LRUD data.
> > >
> > > I looked in thTMPDIR and found nothing useful.  I also checked to see
> if
> > > it comes from Aven or Loch.  Nothing there.  I looked through a KML
> file
> > > and found nothing.
> > >
> > > Can any of you point me in the right direction?  Believe it or not, I
> need
> > > to testify in court early next week about this.  It's a long story ...
> > >
> > > Thanks!
> > > ========
> > > Bill Gee
> > >
> > >
> > >
> > >
> > > _______________________________________________
> > > Therion mailing list
> > > Therion at speleo.sk
> > > https://mailman.speleo.sk/listinfo/therion
> > >
> >
> >
> >
>
>
>
>
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-- 
Enrico Fratnik

e. enrico.fratnik at gmail.com
PEC enrico at pec.fratnik.it
skype: fratnike
t. +39.335.6573879


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