October 2021 - 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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Colour map-fg altitude quick shading breaks object colour fills
by Bruce Mutton 04 Nov '21

04 Nov '21

Hello Forum Just noticed something missing on a few of my maps. Looks like: colour map-fg altitude smooth-shading quick # or default disables the colour filling of objects like rocks and area flowstone. Eg If I turn off smooth-shading OR use a fixed colour or scrap or topo-date shading regime, then the objects are correctly filled. Eg So it looks like a bug with smooth-shading = quick. Perhaps. Bruce

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Minimum symbol scale
by Tarquin Wilton-Jones 28 Oct '21

28 Oct '21

Hi folks, There is a setting: min-symbol-scale M That allows you to hide all symbols of S or XS scale. That's useful when you want to show only the most important symbols in a low resolution survey. But is there a way to control this differently only for certain symbols? Eg. I want to be able to hide all "point label" symbols of scale M-XS but I don't want all my cave walls or breakdown choke symbols to disappear (which are at the default M scale). Essentially I want something like this: min-symbol-scale point label L min-symbol-scale point anchor:foo M Some of this I can of course do with MetaPost. But labels (the thing I care most about) don't allow you to easily redefine the MetaPost macro ... or at least the syntax is so weird that I don't understand it. Thanks for any advice. Tarquin

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Import to Therion from Qave
by Graham Mullan 22 Oct '21

22 Oct '21

Hi All Someone I am working with is collecting his data using an application called Qave. He is having a problem exporting to Therion to do the final drawing. I have no experience of Qave (spoiler, I've never heard of it before) so can offer no advice as to how to do this. Can anyone on here assist? Graham graham.mullan(a)coly.org.uk In the UK +44 7887 637064 or +44 117 9502556 In France +33 5 53 51 19 15 or +33 6 02 53 37 81 France from the Uk 0844 232 7803

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Therion Github plan
by Bruce Mutton 13 Oct '21

13 Oct '21

Just curious Is the Therion repository on Github <https://github.com/pricing> supported by a free or a pain plan? Bruce

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Selecting map defined with preview only causes error
by Bruce Mutton 05 Oct '21

05 Oct '21

Hello Team I think this may be a bug. Selecting a map with only previews inside of it is causing an error, where possibly it should not. And if it is by design that it triggers an error, then the message it gives is not helpful. A better message would be "map cannot contain only previews" The error message. therion.exe: error -- GreenlinkArea/INDEXGLMESM_System.th [164] -- incompatible map projection -- SwissM_PlanMap@GLMESM_system The map definition. map GLMESMPreviewOnlyMap -projection plan preview below SwissM_PlanMap@GLMESM_system #map preview below DwarfsDoorPlanMap@GLMESM_system #map preview below MiddleEarthPlanMap@GLMESM_system #map endmap GLMESMPreviewOnlyMap The maps all have -projection plan explicitly defined, and the error is unchanged if I remove the projection option from the definition above. The thconfig. select QEII-01GreenLinkPlanCL select QEII-01GreenLinkPlan select GLMESMPreviewOnlyMap I have selected three maps, two contain valid maps, and one contains only previews. If I remove one of the 'preview below' statements preceding any of the previewed maps, the project compiles as expected. If I try to type the preview below directly into the thconfig, there is an error also, but I suspect this might be by design. Using 6.0.3, but am not assuming this was introduced recently. I have never tried it before. Regards Bruce

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Compile error do to "calibrate" command
by Torsten Schnitter 04 Oct '21

04 Oct '21

Hello List As mentioned in my post before, sometimes I need to do a resurvey. As the cave is an underwater cave and therefore the waterlevel can change I need to "correct" the depth readings. E.g.: The initial survey was done and the water depth at the start station was -5m at this time. The resurvey was done at a different time and the water level at the same start station was -9m. (to use positive numbers inside the data I use: "calibrate depth 0 -1") initial survey: centerline data diving from to length compass backcompass fromdepth todepth left right up down calibrate depth 0 -1 10 11 2.04 160 - 5.2 3.9 [ - -] [ - -] [ - -] [ - -] ... endcenterline resurvey: centerline data diving from to length compass backcompass fromdepth todepth left right up down calibrate depth 4 -1 0 1 3.09 284 - 9.2 11.4 [ 0.2 2.6] [ 0.2 0.9] [ - -] [ 2.2 0.2] 1 2 2.92 298 - 11.4 12.5 [ 2.6 1.8] [ 0.9 1.3] [ - 1.1] [ 0.2 1.1] 2 3 1.96 259 - 12.5 13.7 [ 1.8 1.2] [ 1.3 1.2] [ 1.1 1.2] [ 1.1 0.0] ... endcenterline Station 10 from the initial survey is identical to station 0 from resurvey and I do connect these using equate command. Due to the different waterlevel there is a difference of 4.0m in depth readings. To correct this I used "calibrate depth 4 -1" within the resurvey data. My assumption for e.g. station 0 was: (9.2 - 4) * -1 = -5.2 (identical to station 10 from initial survey: (5.2 - 0) * -1 = -5.2) (as discribed in the therion book on page 19: measured value = (read value - zero error) * scale) But doing so I get an error from the compiler: therion 6.0.0 (2021-07-13) - using Proj 5.1.0, compiled against 5.1.0 initialization file: C:\Program Files (x86)\Therion/therion.ini reading ... done configuration file: thconfig-survey.thc reading ... done reading source files ... done preprocessing database ... done C:\Program Files (x86)\Therion\therion.exe: error -- test.th [64] -- length reading is less than change in depth writing xtherion file ... done Line 64 is station 2 from resurvey. Depth difference is 13,7-12,5=1,2 and Distance is 1,96 (1,96 > 1,2). I don't understand this error. When changing "calibrate depth 4 -1" to "calibrate depth 0 -1" in the resurvey there is no error compiling the data. But the depth readings are not correct then. What do I get wrong with calibrate command? Torsten

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Metapost exit code in therion 6.0.1 and 6.0.2
by A Gott 04 Oct '21

04 Oct '21

HI Everyone, A friend messaged me while I was lucky enough to escape the UK and get to spain for some caving, which was great! I've got back and tonight I tried to look at the problem he was having outputting in Therion 6.0.1 I ran his survey in 5.5.3 with no issues whatsoever, I thought he could be getting a bug from 6.0.1 so i updated my software, and now i'm bugged in 6.0.2 with the metapost exit code on his survey. ####################### metapost log file ######################## This is MetaPost, version 2.00 (TeX Live 2020/W32TeX) (kpathsea version 6.3.2) 22 SEP 2021 21:44 **data.mp (c:/Program Files (x86)/Therion/texmf/mpost/mpost.mp (c:/Program Files (x86)/Therion/texmf/mpost/plain.mp Preloading the plain mem file, version 1.005) ) (./data.mp {randomseed:=42} [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [1] [Warning: scrap outline intersects itself in scrap loper-p(a)inglorious.CusseyMas ter] [2] [3] [4] [5] [Warning: scrap outline intersects itself in scrap indy-1p(a)Indy.CusseyMaster ] [6] [7] [8] [9] [10] [11] [12] [Warning: scrap outline intersects itself in scrap timewarp-3p(a)Timewarp.CusseyM aster] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] [Warning: scrap outline intersects itself in scrap inglorious-1p(a)inglorious.Cus seyMaster] [28] [29] [30] [31] [Warning: scrap outline intersects itself in scrap mine1(a)inglorious.CusseyMaste r] [32] [33] [34] [35] [36] [37] [38] [Warning: scrap outline intersects itself in scrap shattered_dreams-2p@shattere d_dreams.CusseyMaster] [39] [40] [41] [42] [43] [44] [45] [46] [47] [48] [49] [50] [51] [52] [53] [54] [55] [56] [57] [58] [59] [60] (./mptextmp.mp) [61] ! Logarithm of -64.77 has been replaced by 0. log->begingroup(if(EXPR2)=0:0else:mlog((EXPR2))/ mlog(10)fi)endgroup <to be read again> ; s_altitudebar->...d:=(EXPR1)-(EXPR0);dlog:=log(d); if.dlog.mod1<0.301:dv:=2;e... l.10965 ...,(0.00000,0.75000,0.75000,0.00000))("") ; Since I don't take logs of non-positive numbers, I'm zeroing this one. Proceed, with fingers crossed. (./mptextmp.mp) (./mptextmp.mp) [62] ) Here is how much of MetaPost's memory you used: 18042 strings using 388328 characters 2412656 bytes of node memory 1681 symbolic tokens 11i,82n,19p,452b,5f stack positions out of 16i,98n,20p,487b,6f 76 output files written: data-patt.1 .. data.62 #################### end of metapost log file #################### C:\Program Files (x86)\Therion\therion.exe: error -- metapost exit code -- 2 writing xtherion file ... done I don't know whether its a bug or whether there is an error with the config file which only presents in 6.0.1/2 but I thought I would send it to the list for thoughts? Alastair. please find below config file which ran fine in 5.5.3 source CusseyMaster.th export model -fmt survex -o CusseyMaster.3d export map -proj [elevation 0] -layout localside -o CusseyElevation.pdf export map -proj plan -layout LayoutMapBorder -layout sidesurvey -layout localplan -layout-map-image 5 20 sw "./arrow.png" -layout-map-header 0 0 off -o CusseyMaster.pdf #export map -proj plan -layout LayoutMapBorder -layout sidesurvey -layout localplan -layout-map-image 17 20 sw "./arrow.png" -o CusseyMaster.pdf export map -proj plan -layout LayoutMapBorder -layout localplan -o CusseyPlan.pdf layout sidesurvey map-image 55 100 s CusseyElevation.pdf endlayout layout localside symbol-set BCRA symbol-hide group cave-centreline scale-bar 25 m map-header 98 97 n map-comment "Discovered and Explored by Eldon Pothole Club 2020 - 2021 Surveyed By: Luke Cafferty, Rob Eavis, Jon Pemberton, Jeff Wade Survey Drawn By: Rob Eavis Elevation, facing North Entrance: SK 21545 76524 Altitude: 244m " legend on grid bottom grid-coords border grid-size 10 10 10 m #grid-origin 0 0 0 m colour map-fg [80 89 94] #colour map-bg [20 39 14] code metapost def s_scalebar (expr l, units, txt) = begingroup interim warningcheck:=0; tmpl:=l / Scale * cm * units / 2; tmpx:=l / Scale * cm * units / 5; tmph:=5bp; % bar height endgroup; pickup PenC; draw (-tmpl,0)--(tmpl,0)--(tmpl,-tmph)--(-tmpl,-tmph)--cycle; p:=(0,0)--(tmpx,0)--(tmpx,-tmph)--(0,-tmph)--cycle; for i:=-2.5 step 2 until 2: fill p shifted (i * tmpx,0); endfor; begingroup interim labeloffset:=3.5bp; for i:=0 step (l/5) until (l-1): tmpx:=tmpl * (i * 2 / l - 1); label.top(thTEX(decimal (i)),(tmpx,0)); endfor; label.top(thTEX(decimal (l) & "\thinspace" & txt),(tmpl,0)); label.bot(thTEX("Scale = 1 : " & decimal round(Scale*100)),(0,-tmph)); endgroup; enddef; endcode code tex-map \legendcontent={% \hsize=\legendwidth \ifnortharrow\vbox to 0pt{\line{\hfil\northarrow}\vss}\fi \edef\tmp{\the\cavename} \ifx\tmp\empty \else {\size[40]\the\cavename} \vskip1cm \fi \ifscalebar\scalebar\vskip1cm\fi {\rightskip=0pt plus 3em\parskip=3bp \edef\tmp{\the\comment} \ifx\tmp\empty \else {\size[12]\the\comment} \par\medskip \fi } \formattedlegend } endlayout layout LayoutMapBorder code tex-map \framethickness=0.5mm endlayout ####### PLAN ####### layout localplan symbol-hide group cave-centreline #scale-bar 20 m #symbol-hide special scale-bar symbol-hide special north-arrow code tex-map \legendtitle={} \cavename={} \scalebarfalse \cavelengthtitle={} \cavelength={} \cavedepthtitle={} \cavedepth={} endcode map-header 5 20 sw map-comment "Plan View" colour map-fg depth #colour map-bg [20 39 14] endlayout

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new Therion 6.0.3
by Therion 04 Oct '21

04 Oct '21

Hi, there is a new release 6.0.3 of Therion. Check https://github.com/therion/therion/releases/tag/v6.0.3 for more details. Best regards, Therion team

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