[Therion] Combining caves using different co-ordinate systems

[Bruce]

Hmm, Seems you are right that it is wrong.
I tried adding explicit select statements to the thconfig-both_csconfig.thc
and changing the position of the cs within the file, with no change in
behaviour.
Looks like a bug to me.

Only difference that I can see with how I use it is that I am using lat-long
(sometimes but not always) and two variants of an EPSG specification (which
if exhibited same behaiour would give 1000's km error), whereas you have not
used an EPSG code for eur79z30.


Clutching at straws...
Does eur79z30 have an EPSG code, and if it does, does using it's EPSG code
in place of eur79z30 fix the behaviour?

Bruce

-----Original Message-----
From: therion-bounces at speleo.sk [mailto:therion-bounces at speleo.sk] On Behalf
Of Footleg
Sent: Saturday, 20 September 2014 11:55 p.m.
To: List for Therion users
Subject: Re: [Therion] Combining caves using different co-ordinate systems

I have checked that both my survey files have date and cs declarations
inside centreline blocks. Each file generates the correct position when I
generate a KML from either file alone.
Next I tried to add a cs statement in my thconfig file. This appears to
over-ride the cs I declared in the centreline block. So if I put a different
cs declaration in the thconfig file to the cs declared in the survey data
file, then this results in the kml output putting the cave in the wrong
place.

I have created a bear bones set of examples (attached). The cave should be
on the edge of the open grass area and trees.

thconfig-eur79Only.thc  Puts the cave declared with Eur79 datum in the
correct place.
thconfig-EPSGOnly.thc Puts the cave declared with EPSG:25830 datum in the
correct place.

thconfig-eur79csconfig.thc Declares the cave with Eur79 but specifies
EPSG:25830 in the thconfig, and the cave now appears in the wrong place.

The other files show various ways of including both caves, and they are
rendered always with one in the correct place and one in the wrong place.

Footleg