[Therion] Survex Terrain model problem

Владимир Георгиев vld.georgiev at gmail.com
Thu Mar 24 14:36:04 CET 2016

Hmm, you seem to be talking about the original Survex data file. I see the
format is similar to the .th files, but I meant producing a 3D file
exported from Therion.

In the Therion data I have a CS command and a fixed station, but maybe this
is not exported to the 3D file for consuming by Survex. Most of the 3D file
looks binary and I can't find out whether it contains this info or not.


On Thu, Mar 24, 2016 at 3:28 PM, Wookey <wookey at wookware.org> wrote:

> +++ Владимир Георгиев [2016-03-24 13:41 +0200]:
> > Hi
> >
> > I was experimenting with the .3d model exported from Therion to Survex.
> > The Survex viewer (Aven) has an option to display the terrain too. When
> I go to
> > View > Terrain I get an error "No coordinate system specified in survey
> data".
> A terrain model has co-ordinates in real-world space, so you cave
> needs to also be located in real-world space (not just arbitraty
> 0,0,0)
> > In the Therion data there is a coordinate system specified, fixed
> station as
> > well as terrain data and it is displayed in Lox.
> > Has anyone seen this error or had success in showing the terrain in
> Survex?
> You need to add a *CS command to your data (co-ordinate system) to say
> what system is in use, and add a fixed-point (e.g. for the entrance)
> to say where in that space the cave is.
> http://survex.com/docs/manual/datafile.htm (look for *CS)
> Wookey
> --
> Principal hats:  Linaro, Debian, Wookware, ARM
> http://wookware.org/
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