Quoting Andrew Atkinson <andrew@wotcc.org.uk>:
The aim is so I can run each section of cave (represented by a directory) individually or the whole thing from the root, without editing the whole cave.
Hope this helps you understand what I am trying to do.
Yes. I think, now I understand your problem. I am not sure, but simple solution of this problem would be not to generate errors, if one station is imported twice - from global .3d and from local .3d file. And of course allways prefer the coordinates from the global file. This will probably work, I am just able to start working on it after Christmas :)
For information: Everyone who surveyed drew up there own surveys and Therionised them, even computer phobic's became quite enthusiastic. On the last day of the trip the plans where printed and handed to the local park warden. Okay, they where not perfect. This would not have been possible without Therion, so thanks.
This is great! S.