[Therion] UTM 30 N

Footleg drfootleg at gmail.com
Tue Apr 5 15:03:33 CEST 2011


OK, as I've not got anywhere with this, is there a way to ignore the
coordinates in a survex 3D file, and instead fix a survey station to a point
where I define the position and coordinate system in my therion file, and
associate a station in my Survex 3d file with that point? The problem I have
is that I am using existing survex .3d files where all the coordinates are
in UTM30 European 1979 Datum. This is not the same as the more common WGS84
Datum. So I cannot set the coordinate system for my .3d file directly.

You can hopefully see what I am trying to do here:

survey LosHoyos

  #fix 1.0 41.234567 -3.21012 213

  import 0072.3d -surveys use #-cs EPSG:32230

endsurvey

I am importing an existing survey centreline from the .3d file. I cannot
assign this a coordinate system directly as Therion does not support the
coordinate system I need.
So instead I define the point 1.0 as fixed using the WGS84 Lat Long which I
have. Now I want to attach the stations imported from the .3d file to the
fixed point to correctly position the cave.

Footleg


On 26 March 2011 13:40, Footleg <drfootleg at gmail.com> wrote:

> That appears to be the ED50 Datum. I need the EUR79 datum of everything is
> a few hundred metres out of position.
>
> Footleg
>
>
> On 26 March 2011 12:43, Graham Mullan <graham.mullan at coly.org.uk> wrote:
>
>> For Spain, try using EPSG 23030 for your cs
>>
>> see http://spatialreference.org/ref/epsg/23030/
>>
>> Graham
>> --
>> graham.mullan at coly.org.uk
>>
>> 0117 9502556 or 07887 637064 (or 0844 2327803)
>>
>> On 26/03/2011 11:00, therion-request at speleo.sk wrote:
>>
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>>> Today's Topics:
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>>>    1. Support for UTM European 1979 Datum (Footleg)
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>>> ----------------------------------------------------------------------
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>>> Message: 1
>>> Date: Fri, 25 Mar 2011 14:13:54 +0000
>>> From: Footleg<drfootleg at gmail.com>
>>> Subject: [Therion] Support for UTM European 1979 Datum
>>> To: List for Therion users<therion at speleo.sk>
>>> Message-ID:
>>>        <AANLkTinKkQdQt5dgdGcma_9ratem5n+WHMxn9Yw2WwOH at mail.gmail.com>
>>> Content-Type: text/plain; charset="iso-8859-1"
>>>
>>> I'm making good progress now on learning how to generate various output
>>> from
>>> Therion, and have started on generating KML plan maps for google earth.
>>> My
>>> problem is that my survey data is coming from survex .3d files which I am
>>> importing. I am working with data for many hundreds of caves, and they
>>> are
>>> all fixed using UTM with the European 1979 Datum because that is the
>>> coordinate system of the expedition area maps we have had for the past
>>> few
>>> decades. As far as I can tell, this datum is not included in Therion at
>>> the
>>> moment. I've checked the epsg file in the source. I specifically need the
>>> UTM30N zone as all our caves using this coordinate system are in that
>>> zone.
>>> Is this something which can be added please?
>>>
>>> Footleg
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