January 2020 - 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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Changing Atlas layout
by Benedikt Hallinger 03 Feb '20

03 Feb '20

Hello, i currently map a relatively long tunnel and want to be able to print it out on several A4 papers. The Atlas function of therion is the thing that solves this problem quite nicely. However, how can i tune the atlas layout, like disabling all visible features of the atlas (no navigation, no title, no borders when showing the overlapping (but the overlapping should persist!) The main goal is, to print the tunnel like it prints in normal export mode, but on several pages which break like it does in atlas mode.

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Help - joining surveys error
by עמרי גסטר 22 Jan '20

22 Jan '20

Hi everyone, I need to join 4 surveys and I have a strange error which I don't understand... kikarOmRzRb071219 kikar_start Hkikar_inner_3_1_20 Hakikar_B_7_12_19 every survey by itself is generated fine. when I'm joining kikarOmRzRb071219 to Hakikar_B_7_12_19 the join is good, but when I add the others I get an error that the scrap file doesn't exists... why Therion doesn't recognize the scraps? I added the .th & .th2 files Omri --

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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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