On Wed, Nov 14, 2018 at 07:07:50PM +0000, Andrew Atkinson via Therion wrote:
I've not had time to play with this, since Alistair showed me the problem on the weekend. The bit that I cannot get my head round is when 3d are imported with a coordinate system, if a th centreline then connects 2 parts of the survey from the 3d or an entrance coordinate is specified for the 3d, how does this change, or can it change the coordinates of the data from the 3d as the stations from this already has coordinates with little information about the connections [I hope that makes sense]
Survex .3d files record the coordinate system the data is in, if one was specified. This was added in Survex 1.2.14 (released 2014-07-05). But looking at the therion source code, it appears therion never makes use of this information. I suspect therion just hasn't been updated for Survex gaining coordinate system support. You can specify the coordinate system as an option to therion's import command, so for now I guess that's what you have to do. Cheers, Olly