- Therion - speleo.sk

Re: [Therion] Problem with diving data
by Graham Mullan 19 Oct '11

19 Oct '11

I can understand why Therion wouldn't 'like' diving data with zero length legs, but that is bye the bye. If you list LRUD data separately from centre line data with the heading of, say: data dimensions station left right up down then you should get everything in the correct place. Graham

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problem with areas/borders
by Bjørn Egil Johansen 18 Oct '11

18 Oct '11

Hello. I am quite new to Therion, and I am currently drawing a map over a cave we are exploring now. Therion mostly works great. I have some problems, but most of them I manage to solve by using the documentation and the good old "trying and failing strategy." However I have a problem with areas that I have not managed to solve. The "filling" often seem to not stay inside the given borders. I have tried doing it a number of ways, but all seems to fail. I then returned to the example data, and one of the examples, the small example cave 1 has a nice little lake quite similar to the one I am trying to create. The data is here: http://therion.speleo.sk/downloads/demo.tar.gz But this also compiles in a way placing the lake outside of its borders. I have enclosed a PDF of the compiled example. Does any of you know what is wrong? I use Therion 5.3.8 on a Ubuntu 11.10 desktop. (Therion from repositories, I have not compiled myself.) Best Regards Bjørn Egil Johansen Tromsø, Northern Norway.

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NASA, Japan Release Improved Topographic Map Of Earth
by Martin Sluka 17 Oct '11

17 Oct '11

http://www.nasa.gov/home/hqnews/2011/oct/HQ_11-351_ImprovedTopoMap.html

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Declination and meridian convergence
by Wolfgang Zillig 04 Oct '11

04 Oct '11

Hi, I'm a little bit confused at the moment how to correct for declination and meridian convergence. Question 1: Is it correct that in therion and in survex the declination is specified exactly the opposite way? Therion handbook page 18: true bearing = measured bearing + declination Survex 1.2.1 manual page 19: (true bearing)=((bearing)-(declination zero err)) So in case that magnetic north is 2° east of geographic north, I have to correct this in therion by -2 and in survex by +2. If this is correct, could you please add a warning note to the therion manual! Question 2: When I enter the measurement data in therion, the meridian convergence is handled automatically (in case a "cs" is specified). However due to historic reasons most of our data is still in survex format. I import the ".3d" file and specify the "cs" during import. I assume that therion is not applying any corrections for the meridian convergence and I need to correct the bearings manually in survex?

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Re: [Therion] Offset legs in diving data
by Graham Mullan 30 Sep '11

30 Sep '11

I now have the LRUD working in Therion, having worked out the subtle differences between Survex and Therion syntax. The file compiles Ok and generates a nice loch file. However, I cannot find how to export the XVI format for loading into the th2 file. There seems to be no export option. Graham

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FW: Offset legs in diving data
by Bruce 30 Sep '11

30 Sep '11

I have never entered diving data, but I imagine two relatively straightforward options would be... Enter the LRUD as a separate block of data Eg data dimensions station left right up down Or enter the LRUD with the leg data (assuming that the LRUD is taken at the 'to' station) Eg data diving from fromdepth to todepth compass tape left right up down For drawing completely electronically you could do as Stacho suggests, or you could set a colour for the map foreground and export the map to pdf, print it, sketch on paper, scan and trace around it in xtherion. Eg colour map-fg [97 86 38] # yellow brown ... export map -projection plan \ -layout Layoutcentreline \ -output ./Output/CentrelinePlan.pdf Bruce

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Maximum surface image size
by Carl Magnuson 30 Sep '11

30 Sep '11

I created a larger background image for my growing map and now I am getting the following message: therion: warning -- background.th [7] -- error reading bitmap -- unable to determine image size -- images/background.jpg Is there a maximum supported size for JPG? My new background is 15,132x11,340. Or is it possible to input multiple surfaces for a background, so I could break that one large image into smaller tiles? Thanks! Carl

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Offset legs in diving data
by Graham Mullan 29 Sep '11

29 Sep '11

I have some diving data, in the form data diving from fromdepth to todepth compass tape LRUD data has also been collected for these sumps. I would like to be able to display the latter as offset legs in the th2 file to aid in drawing the map. How does it need to be entered into a th file and how do I then generate a background for th2, as is down with DistoX data? Graham

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Generated PDF compliant to spec?
by Carl Magnuson 29 Sep '11

29 Sep '11

I tried converting my PDF map to a JPG using Ghostscript yesterday. It seemed to convert properly, though I saw a handful of warnings that there was an "Unknown operator: 'pop'" in the source PDF. Is Therion producing something which isn't to spec, or producing a newer version PDF that Ghostscript isn't prepared for? I was using Therion 5.3 Thanks, Carl

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Re: [Therion] Generated PDF compliant to spec
by Graham Mullan 29 Sep '11

29 Sep '11

PDFs generated by me from Therion 5.3.8 are reported by Acrobat as being pdf version 1.5, that is compatible with Acrobat 6 and above. I'm afraid I don't know Ghostscript, but Acrobat will export as jpg. Graham --

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