<div dir="auto">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]<br><br><div data-smartmail="gmail_signature">Andrew</div></div><br><div class="gmail_quote"><div dir="ltr">On Wed, 14 Nov 2018, 18:45 Bruce Mutton via Therion <<a href="mailto:therion@speleo.sk">therion@speleo.sk</a> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Not sure I understand you situation properly. And I have no experience using .3d files as input.<br>
<br>
However, in general...<br>
<br>
If you have multiple surveys, each with a different (but not arbitrary) coordinate system set, then there should be no problem if you identify the coordinate system in each low level (survey trip) survey. Each one can be different. ie cs lat-long in one, cs EPSG:27200 in another, and cs EPSG:2193 in another. On occasion I specify multiple cs in each input file.<br>
<br>
Then you can specify the output coordinate system in the thconfig file. If more than one is specified in the thconfig, then only the last one is used. Ie all outputs must share the same cs.<br>
<br>
Looking at the wiki and Therion Book, I am not sure that the input side of this problem is well documented.<br>
<br>
Bruce<br>
<br>
-----Original Message-----<br>
HI,<br>
<br>
I was trying to join a file [with Centreline driven by .3d data (.3d)] to another file [with centreline driven by my electronic surveying data (Elec)].<br>
<br>
The .3d file seems to come with it's own coordinate system, so we needed to remove(#) the entrance coordinates, from the Elec data.<br>
<br>
I have joined these two surveys in a .th file and successfully got an output. There are two entrances to the system.<br>
<br>
So my question is, can I add back coordinate data for one (or more) Entrance(s) at the last level of the survey hierarchy? or will the mismatch between .3d and Elec prevent me from doing this?<br>
<br>
<br>
Regards,<br>
Alastair Gott.<br>
<br>
<a href="mailto:AlastairGott@hotmail.com" target="_blank" rel="noreferrer">AlastairGott@hotmail.com</a>,<br>
M: 07931779380,<br>
<br>
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