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. Vladimir On Thu, Mar 24, 2016 at 3:28 PM, Wookey <wookey@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/