[Therion] Magnetic declination meltdown

[Bruce]

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 at 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 tex variable    \magdecl = magnetic
declination in degrees.

 

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 TeX's memory you used:

 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

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.speleo.sk/pipermail/therion/attachments/20150119/131fc0af/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.jpg
Type: image/jpeg
Size: 29064 bytes
Desc: image001.jpg
URL: <http://mailman.speleo.sk/pipermail/therion/attachments/20150119/131fc0af/attachment.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image002.jpg
Type: image/jpeg
Size: 5638 bytes
Desc: image002.jpg
URL: <http://mailman.speleo.sk/pipermail/therion/attachments/20150119/131fc0af/attachment-0001.jpg>