December 2019 - Therion

Re: [Therion] Point altitude/deph, Help !
by Xavier Robert 28 Jun '22

28 Jun '22

Hi all, I think I have found a trick. The other Xavier led me to the right tracks, thanks a lot ! Finally, this is quite simple with the point altitude, and no need to change anything inside the : - If we use the point altitude only with the option -align, we get the altitude - If we use the point altitude with the options -align and -value [-1004 m] where 1004 is the altitude of the main entrance, we print the depth only for that point (Do not forget the " - " before the altitude of the main entrance), and thus, we do not erase the classic point altitude. The only (small) limits are : * If the main entrance changes, we need to manually update ALL the points that print the depth. But that should not be be everyday, and not a big issue to do that. * the symbology of the two points is the same. I will have a look for a way to modify that and let you know if I find a trick (If I copy the code of the point Altitude, and call it p_u_depth(expr pos, R, S, A), it crashes...). Cheers, Xav

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How to calculate the volume of a cave
by Bill Gee 31 Jan '22

31 Jan '22

Hello everyone - What tools can be used to calculate the volume of a cave based on center line and LRUD data? I found an email from Martin Sluka from about 4 years ago describing how to use Loch to export a .lox file in other formats, then run that file through CloudCompare or ParaView. The process looks very complex to me, and besides - Loch does not run on my computers, so there is no way for me to generate an export. As far as I can tell, Survex does not have a way to calculate volume. Could it be done with a KML file and Google Earth? -- Bill Gee

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"\legendbox" "\loadpicture" and absolute paths
by rowena 14 Mar '21

14 Mar '21

Hello, I am using the "\loadpicture" capability in "\legendbox" constructs to include map sections, elevations, etc. It all works nicely on my PC where I am using relative paths to the pdf files. My club has a desire to archive the map data for posterity - ie if my pc dies or I go walkabout, the map data should still be available so that others can add to the maps as they are extended. I would prefer to have the images included using relative pathnames, rather than absolute pathnames, so that future explorers can download the map data and extend it, without having to duplicate my file hierarchy. How can I include relative paths in the \loadpicture functionality? Thanks, Rowena

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extend
by Marco Corvi 02 Jun '20

02 Jun '20

i think that extend should take values in the interval [-1,1], ie also fractional values, plus some special value such as "ignore" to open loops, and "undefined" to let the program choose, because it's a nuisance to enter a decimal number for every shot (legs + splays). therion uses the left/right normal/reverse etc. solution, and users should be allowed to set extend also for splays, if they need to. for now, let's use left/right/vert, and ignore only to open loops btw, are vertical extend considered in the computation of the cave length by therion ? marco

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World Magnetic Model
by kevin dixon 28 Feb '20

28 Feb '20

The last Therion release 5.4.3 is dated 01 Feb 2019. There has in recent years been a significant change of the Magnetic North Pole location, less so for the Geomagnetic South Pole: https://ngdc.noaa.gov/geomag/GeomagneticPoles.shtml Given the above, an out of cycle World Geomagnetic Model WMM2015v2 was released 04 Feb 2019. When will this update appear in Survex and Therion ? Thanks, Kevin Dixon

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compiling error
by Gareth Davies 07 Jan '20

07 Jan '20

I'm getting the same error every time I compile. it doesn't seem to effect the process as the PDF appears to be creating correctly.. Anyhow other than being annoying it means I have to switch views constantly so any thoughts? ##################### end of pdftex log file ##################### done writing xtherion file ... C:\Program Files (x86)\Therion\therion.exe: warning -- can't open xtherion file for output -- Plan.thconfig.xth compilation time: 1 sec

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Re: [Therion] problem with -flip horizontal extended elevation scrap
by Xavier Robert 27 Dec '19

27 Dec '19

Hi Alastair, Sorry for my late answer, I couldn’t test anything before today. I try your trick (extend definition in the .th data files + the -flip horizontal in the scrap definition), and yes, it works. I will keep that in mind ! Thanks a lot ! Cheers, Xavier > Le 21 déc. 2019 à 06:06, alastair gott <alastairgott(a)hotmail.com> a écrit : > > Hi Xavier, > > Did my answer to omri help you or is there a different problem with your scenario? > > Alastair. > > Sent from my iPhone > > Begin forwarded message: > >> From: Xavier Robert <xavier.robert(a)univ-grenoble-alpes.fr <mailto:xavier.robert@univ-grenoble-alpes.fr>> >> Date: 20 December 2019 at 10:50:53 GMT >> To: Therion <therion(a)speleo.sk <mailto:therion@speleo.sk>> >> Subject: Re: [Therion] problem with -flip horizontal extended elevation scrap >> Reply-To: List for Therion users <therion(a)speleo.sk <mailto:therion@speleo.sk>> >> >> Hi everyone, >> >> I did not already send an issue that I faced some weeks ago, because I wanted to show it with simple examples that I did not have the time to build, but it seems to me related to Omri’s problem : >> >> For a project, I am currently passing/numerizing hand drawn maps that friends has drawn on a skeleton with stations names. For some reasons, after this process, I had to reverse the direction of some passages for extended elevation. I have just done it by playing with the « extend » command in the data, without changing/redrawing the scraps. The scraps are thus flipped by Therion, and I have the same behaviour than Omri : It flips them upside down and mashing up the lines. This is not the behavior I was waiting for... >> >> I will try to take some time to build a small example as soon as I can ! I am not sure, but it looks like it is a bug in Therion. >> >> Cheers, >> >> Xavier >> >>> Le 20 déc. 2019 à 11:15, ⁨עמרי גסטר⁩ <⁨omrigas@gmail.com <mailto:omrigas@gmail.com>⁩> a écrit : >>> >>> Hi everyone, >>> >>> I have a scrap of extended elevation to left and I want to flip it so it will be to the right, but when I add -flip horizontal to the scrap definition it flips it upside down and mashing up the lines. >>> -flip vertical does the same thing. >>> >>> am I missing something? >>> my file is generated from Topodroid >>> >>> I added an examples of what it does and the .th +.th2 files >>> >>> -- >>> Omri >> >> _______________________________________________ >> Therion mailing list >> Therion(a)speleo.sk <mailto:Therion@speleo.sk> >> https://mailman.speleo.sk/listinfo/therion <https://mailman.speleo.sk/listinfo/therion>

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symbol for pit entrance
by עמרי גסטר 27 Dec '19

27 Dec '19

Hi everyone, I want to use this symbol as a pit entrance: [image: image.png] As far as I know there isn't a symbol like this in Therion, does anyone have a metapost code for this? Omri --

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therion sketch .th, Use of Grade UISv1_1
by alastair gott 23 Dec '19

23 Dec '19

Hi Therion mailing list, I'm trying to use the function "grade" in one of our .th files, theres a sketch made of a cave with very little detail, but we think it would be better to include it. I'm strugging to get the function grade to work, therion is giving me red writing "-- not enough data readings" and stopping the survey from generating, but only when I implement the grade function. I must be using it incorrectly, but I've tried it between survey and centreline commands too and that isn't working either. this gives red writing "-- invalid value -- centerline" centerline #[omitted] units length meters units compass clino degrees data normal from to length compass clino extend left grade UISv1_1 0 1 1.00 300 0.0 1 2 1.00 0.0 0.0 2 3 1.00 0.0 0.0 3 4 1.00 0.0 0.0 4 5 1.00 0.0 0.0 endgrade endcenterline Regards, Alastair Gott. AlastairGott(a)hotmail.com, M: 07931779380.

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Metapost variable for map-bg colour
by Tarquin Wilton-Jones 21 Dec '19

21 Dec '19

By default, the background of a page is set to white. When you set "color map-bg [0 90 0]", it is now green. Can that colour be accessed from Metapost? A diff of the debug Metapost doesn't show anything...

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