[Therion] How to render very big cave with centerline and LROU only?

[Benedikt Hallinger]

Hello,
i try to generate a PDF with the whole cave rendered with LRUD centerline 
data only.
The goal here is to generate a complete picture of the cave (>100km) with 
walls generated from LROU data, because i still have very few scraps at this 
time.

However therion aborts with an error.
How can i render a complex and big system into such a map?
Currently there are only a few scraps in the data and yet i get problems, it 
seems... is an atlas project with caves this big not possible?



For the compile, i generated a map in the compiler file, that selects the 
centerline only:
source
   map onlyCenterline -projection plan
     #Zubringer at Hirlatzhoehle   # <- this renders fine
     Hirlatzhoehle
   endmap
endsource


And the following layout:
layout LROU
   colour map-fg [100 0 0]
   symbol-show group centerline
   scale 1 5000
endlayout


However, when i try to compile it, i get the following error:
Transcript written on data.log.
converting scraps ... done
making map ... done
This is pdfTeX, Version 3.14159265-2.6-1.40.15 (TeX Live 2015/dev/Debian) 
(preloaded format=pdfetex)
  restricted \write18 enabled.
entering extended mode
(./data.tex (./th_enc.tex) (./th_texts.tex) (./th_resources.tex
(/usr/share/texlive/texmf-dist/tex/generic/pdftex/glyphtounicode.tex))
(./th_fontdef.tex{/var/lib/texmf/fonts/map/pdftex/updmap/pdftex.map})
(./th_formdef.tex
Runaway text?
794.15
! TeX capacity exceeded, sorry [main memory size=5000000].
l.286830 \PL{794.15 1
                      423.19 794.21 1423.05 794.31 1422.94 c}%
!  ==> Fatal error occurred, no output PDF file produced!
Transcript written on data.log.
therion: error -- pdftex exit code -- 256



Thank you very much!
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