September 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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maps on off feature characteristics
by Bruce Mutton 08 Oct '19

08 Oct '19

I've just been playing with the new maps on/off feature a little more. These are just some observations. There seems to be a bug regarding map altitudes in all cases, and scrap altitudes where the scraps are empty. On the other hand it is a good way to highlight the existence of empty scraps! The notes below may not be particularly coherent, but together with the attached log files, you should be able to figure out what is going on. Setting maps to off quadruples compile time and increases pdf size by 15 times (not sure why that should be). Maps off On running a project with 614 scraps reported; This log entry was caused by an empty scrap definition, regardless of whether the empty scrap appears in a map definition S -899999999999999990000000000000000000000000000000000000000000000000000000000 0000000000000000000000000.00 04-BangAndBeyondPlan-s2@BlackSabbath () ie scrap 04-BangAndBeyondPlan-s2 -projection plan -scale [0 0 787.4 787.4 0 0 10 10 m] endscrap It seems I have 16 empty scraps in that project, a legacy of using topparser, and not always using all of the scrap definitions that it creates. Maps on On running same project with 254 scraps/maps reported; 1. Empty Scrap causes map that contains it not to appear in log, sometimes 04-BangAndBeyondPlan-s2@BlackSabbath is empty and for some reason the following map is not reported in the log file at all. map 04-BangAndBeyondPlan -title "04 beyond the capped rock - black sabbath plan" -projection plan 04-BangAndBeyondPlan-s1 04-BangAndBeyondPlan-s2 endmap 2. All maps are reported with elevation of; M -899999999999999990000000000000000000000000000000000000000000000000000000000 0000000000000000000000000.00 3. Unexplained empty 'scrap' reported at high altitude. Looking at my data, I cannot explain why this might happen. In the 254 lines, there are only two of these. M -899999999999999990000000000000000000000000000000000000000000000000000000000 0000000000000000000000000.00 61-AngelicaPlan@MiddleEarth (61 Angelica plan) S 473.40 61-AngelicaPlan-s1@MiddleEarth () S 489.54 61-AngelicaPlan-s2@MiddleEarth () S 1219.69 @ () map 61-AngelicaPlan -title "61 Angelica plan" -projection plan 61-AngelicaPlan-s1 #9C start surveying up pitch 61-AngelicaPlan-s2 # to base of 20C endmap 4. Similar things happen with projected elevation outputs, but there are many more of empty report lines, as in 3. above, and the altitudes reported seem somewhat random and just wrong. I wonder if the altitudes are really some measure of distance into or out of the 'page'? Behaviours seem to be the same whether maps or atlas are exported. Very nice for disabling passage offsets and previews. Bruce

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code tex-map maplayout
by Bruce Mutton 01 Oct '19

01 Oct '19

Following Andrew’s questions about code tex-map and not being able to get \formattedlegend to work, I have again experimented to try to resolve some issues I have been having. I hope you managed to get \formattedlegend to work Andrew. I did some experimentation and did not have too much difficulty in getting it to plot in a customised \maplayout. One insight I got from Audrey’s post is that \input th_legend will do almost the same thing as \formattedlegend – the plot just does not have a title. That will be useful sometimes. I don’t think I understand tex, tex-map or \maplayout well enough to be able to provide any insight beyond what has already been given however. On a similar vein, invoking a custom \maplayout code tex-map \def\maplayout{ … } causes any layout map-image specifications to silently fail. I am aware that there is a work around, as described in the wiki <https://therion.speleo.sk/wiki/tex?s%5b%5d=tex&s%5b%5d=map#changing_the_loo k_or_layout_of_a_map_output> , however I’m not keen on complicating my projects in that way. I want a typical Therion user to be able to pick them up without having to know about environment variables and tex. And then I noticed this entry in the wiki https://therion.speleo.sk/wiki/tips?s[]=tex <https://therion.speleo.sk/wiki/tips?s%5b%5d=tex&s%5b%5d=map#map-image_and_c ustom_legendbox> &s[]=map#map-image_and_custom_legendbox This suggests to me that it may be possible to retain the use of map-image simply by defining multiple \maplayouts and presumably they are both invoked in the same pdf output However I have just tried several variations of renamed \maplayout in conjunction with a map-image, and I can only ever get either the ‘layout map-header’ to plot with map-images, or a custom \maplayout without map-images. A renamed \new_maplayout never plots. So is there something missing from the wiki entry, is it misleading, or am I missing something? Ngā mihi Bruce

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text<ss>
by Andrew Atkinson 27 Sep '19

27 Sep '19

I've been adding text and in the thbook p26 under text "<rm>, <it>, <bf>, <ss>, <si> ▷ font switches" They all work apart from <ss> which as far as I can tell, does nothing? What is it mean to do? Therion 5.4.3 on Debian thanks Andrew

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code tex-map - some tokens I cannot get to work
by Andrew Atkinson 26 Sep '19

26 Sep '19

I need to split up the scale bar, north arrow, legend and header information on a survey I'm doing To do this I think that I have to use tex-map, which works fine for the scale bar, north arrow but I cannot get any of the legend tokens work layout combined legend on code tex-map \def\maplayout{ \formattedlegend \northarrow \scalebar \legendbox{10}{20}{NW}{\\scalebar} \legendbox{10}{20}{NW}{\northarrow} \legendbox{10}{20}{NW}{\formattedlegend} } endcode endlayout So in the above I get a scale bar and north arrow in the bottom left from \northarrow \scalebar, but \formattedlegend does not do anything nor does \insertlegend or \legendtitle the \legendbox lets me control where they are I also tried \iflegend(\formattedlegend)\fi But this gives a therion: error -- pdftex exit code -- 256 Anyone got any ideas? Woops missed: therion 5.4.3 (2019-02-01 on debian thanks Andrew

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BUG? Thin line in colour fill
by Andrew Atkinson 26 Sep '19

26 Sep '19

Just been doing the final checks on my survey, and found a thin line that should not be there in the colour file see http://wotcc.org.uk/__Therion/ThinLineInFile.png generated by http://wotcc.org.uk/__Therion/ThinLineinFileth2.png A bit of investigation shows that the lower right station (1) of the line is surface and the upper left is not surface (station 1.1) not sure if this is actually related as I needed a quick fix so. Deleting them solves the problem, but that is not really a good solution see http://wotcc.org.uk/__Therion/NoLine.png and http://wotcc.org.uk/__Therion/NoLineth2.png Therion 5.4.3 on Debian Raw data is at http://www.cave-registry.org.uk/svn/CheddarCatchment/Bagpit/Bagpit/ version 409 has the line it is fixed in version 410 (sorry the head is only available on line, but the full data set is downloadable using an svn client) thanks Andrew

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