Stacho
Thanks for looking at this.
I tried on 5.3.15 and 5.3.16 and the
effect is similar.
Note the shape of the survey legs differs
between outputs – if the date specified is beyond the geomag data, the
angle between the survey legs is wrong.
I think the problem is characterized by
specifying a date that extends beyond the geomagnetic data range contained
within Therion.
In this case the error reported should not
be “unable to determine magnetic declination for undated surveys”
but rather indicate that a survey date extends beyond the geomagnetic database
in this version of Therion.
Have attached the thconfig file I used,
and some outputs identified by the survey date and Therion version used to
create them.
Of the outputs, only the file cave2015-5.3.16.pdf
has survey dates within the range of the version of Therion used to compile it.
It is also the only output with the
correct survey shape and valid /magdecl value.
Bruce
From: therion-bounces@speleo.sk
[mailto:therion-bounces@speleo.sk] On Behalf
Of Stacho Mudrak
Sent: Thursday, 22 January 2015
4:45 a.m.
To: List for Therion users
Subject: Re: [Therion] Magnetic
declination meltdown
Hi Bruce,
I have tried to reproduce your error but without success.
Attached thconfig file gives me "unable to determine
magnetic declination for undated surveys" warning, but \magdecl is
correctly defined (\magdecl={4.67})
Are to able to send me some dataset, where this error
occurs? Or does it happen in previous version of therion?
S.
source
centerline
cs lat-long
data normal from to compass clino tape
0 1 90 0 10
fix 0 48.14 19.99 230
date 2012.01.09
endcenterline
centerline
data normal from to compass clino tape
1 2 100 0 10
endcenterline
endsource
export map
On 19 January 2015 at 09:57, Bruce <bruce@tomo.co.nz> wrote:
It seems I was wrong about the cause of the problem, the problem is
more in Therion than in data entry.
Looks like Therion 5.3.15 cannot handle survey dates in 2015 (as
implied in the changes logs), and so 5.3.16 is required to use coordinate
systems with surveys dated from 2015 onwards.
That is OK, but what could be improved, is the reporting of the
error to something like…
magnetic declination not
available for survey date
and also
to improve the variable \magdecl in this circumstance.
Bruce
From: Bruce [mailto:bruce@tomo.co.nz]
Sent: Monday, 19 January 2015 4:34
p.m.
To: 'List for Therion users'
Subject: Magnetic declination
meltdown
A random discovery with the new
If one uses a defined coordinate system and forgets to
provide a survey date for all surveys, then there is some ‘not very well
trapped’ undesirable behaviour.
The log file produces something like this…
“C:\Program Files\Therion\therion.exe: warning -- unable to determine magnetic declination for undated
surveys
output coordinate system: EPSG:2193
meridian convergence (deg): -0.0696
“
which is appropriate behaviour, however it is followed by…
“
#################### end of metapost log file ####################
converting scraps ... done
making map ... done
######################## pdftex log file #########################
This is pdfTeX, Version 3.1415926-1.40.10 (Web2C 2009)
(format=pdftex 2010.1.2) 18 JAN 2015 20:21
entering extended mode
**data.tex
(./data.tex (./th_enc.tex) (./th_texts.tex) (./th_resources.tex
(c:/Program Files/Therion/texmf/tex/glyphtounicode.tex))
(./th_fontdef.tex{c:/P
rogram Files/Therion/texmf/fonts/pdftex.map})
(./th_formdef.tex
Normal \count register pool exhausted, switching to extended pool.)
(./th_pagedef.tex
Overfull \hbox (299.59392pt too wide) in paragraph at lines 12--12
[]\thfb gridnorth
-1261120821493519700000000000000000000000000000000000000000
00000000000000000000000000000000.00deg |
\hbox(8.33333+2.33333)x330.05206, glue set - 1.0
.\hbox(0.0+0.0)x0.0
.\thfb g
.\thfb r
.\thfb i
.\thfb d
.etc.
) (./th_pages.tex)
253 numeric registers used out of 32768
[1] )
Here is how much of
1706 strings out of 95617
….
“
which is not so good, but at least it does
produce a generally OK looking pdf (with my experimental debug like header
layout).
In this case it might be better to set \magdecl to a more meaningful error value.
If it can take a string value then “unable to determine magnetic declination for undated
surveys” is probably good.
Bruce
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