[Therion] endless chimneys (was: Splays appearing when not selected)

Benedikt Hallinger beni at hallinger.org
Tue Feb 2 10:48:51 CET 2021 

Hello,
that is not the case here: the sole drawer was myself and there is no 
overlap (i know of - the data is self contained in that folder).

The scraps are like this:
map 1-Deckenschlot-vor-KPZ
   1.1-2-26a-SP1-Aufstieg   # <- has stations, is OK
   1.1-2-26a-SP1            # <- has stations, is OK
   1.1-2-26a-SP2            # <- last known station at start. OK until 
the middle of the scrap!
   1.1-2-26a-SP3            # <- no station; joined to 1.1-2-26a-SP2, 
completely "endless chimney"
endmap

What puzzles me is that the chimney starts at a bend in my scrap.
The altitude range is that of the entire cave, and thus the 
"endless-chimney" is very prominent; I think this is a second issue we 
should tackle also (it will somewhat help with the issue here, but not 
solve it).


Am 2021-02-02 10:01, schrieb Martin Sluka via Therion:
> Hi Beni
> 
> that is not a problem of „spikes“ but as you may see on attached
> picture I had the same problem with one my project.
> 
> There were two scraps covered part the same area overlapped. Surveyed
> in two different surveying trips by two different groups drawn by two
> different people. As a result that overlapped area created something
> as infinite vertical chimney.
> 
> I had to comment one scrap in time from that part of cave and checked
> the result. Than I shorted one of those particular scraps and added
> correct join.
> 
> HTH
> 
> Martin
> 
>> 2. 2. 2021 v 9:48, Benedikt Hallinger <beni at hallinger.org>:
>> 
>> Hm, that didn't help, unfortunately.
>> in the meantime I also tried coloring the PDF by altitude, this is
>> not affected and working like expected.
>> 
>> Martin has readonly svn access to the data and may investigate in
>> the dataset?
>> I just unlocked it for that purpose.
>> 
>> The affected thconfig is
>> svn/Hirlatzhoehle/Zubringer/therion/thconfig
>> and the scrap in question is in
>> svn/Hirlatzhoehle/Zubringer/1/therion/1.1.plan-2-b.th2
>> The last known station is 1.2.26j
>> 
>> In the thconfig I noted the following (just local here)
>> 
>> # Hirlatzdaten importieren
>> source ../../../Hirlatzhoehle/therion/Hirlatzhoehle.th [1]
>> # wrong dimensions in lox
>> #source ../../../Hirlatzhoehle/Zubringer/therion/Zubringer.th [2]
>> # works somewhat-ok in lox (still extruded to top of box, but the
>> box itself is small)
>> 
>> Greetings,
>> Beni
>> 
>> Am 2021-02-02 6:31, schrieb Stacho Mudrak:
>> In that case and if there is just one station in this wrong scrap,
>> maybe inserting point dimensions with some reasonable -value [<up>
>> <down> m] over this station in the scrap should help to normalize
>> these crazy heights.
>> If there are no up/down data in the centreline, therion calculates
>> up/down dimensions from shots from a given station. It is not a
>> perfect algorithm and in your case, there is some issue. Placing a
>> point dimension close to the station should override this
>> calculation.
>> HTH, S.
>> On Mon, 1 Feb 2021 at 23:10, Benedikt Hallinger <beni at hallinger.org>
>> wrote:
>> It's hard to isolate.
>> The structure is like this:
>> Hirlatzhoehle/Zubringer/,
>> where Zubringer contains more surveys.
>> Each folder has its own therion/ subfolder containing the therion
>> sources.
>> If i do "source ../../../Hirlatzhoehle/therion/Hirlatzhoehle.th [1]"
>> the
>> bug
>> occurs.
>> That command sources the entire cave.
>> If i do source just the region with "source
>> ../../../Hirlatzhoehle/Zubringer/therion/Zubringer.th [2]" (which
>> contains
>> essentially the same maps and scraps!) the bug occurs.
>> I have no idea how to track this don further, since we already talk
>> about alot of data (2.4 km).
>> Am 2021-02-01 21:37, schrieb Benedikt Hallinger:
>> I try to boil it down
>> Am 2021-02-01 21:12, schrieb Stacho Mudrak:
>> Hmmm, even scraps extending far beyond a known station could
>  cause a
> 
>>> problem - usually, it is the case with steep passages. In your
>  case,
> 
>>> it looks like some outline problem.
>>> Are you able to isolate such scrap and send me some minimalistic
>>> sample?
>>> Thanks, S.
>>> On Mon, 1 Feb 2021 at 20:10, Benedikt Hallinger
>  <beni at hallinger.org>
> 
>> wrote:
>> Hi, thanks for responding,
>> i have the problem only tested with the lox.
>> The red box fits nicely my selected data.
>> The survex file also is OK.
>> Probably it's caused by artifacts, see screenshot.
>> Thats an old bug, and caused by some scraps extending far beyond
>  a
> 
>> known
>> station (walls are marked unsurveyed).
>> Am 2021-02-01 19:52, schrieb Stacho Mudrak:
>> Hi Beni,
>> thanks for review.
>> Are you having coloring problem with .lox file or .pdf map?
>> I have tried on my dataset, but when I select whole cave -
>  entire
> 
>> color range is used - from magenta to red.
>> When I select just a part of the cave, coloring changes and the
>> whole
>> range is used for selected part.
>> Does your red rectangle fit selected data or is it much bigger?
>  If
> 
>> the
>> latter is the case, there must be some artifacts still
>  remaining -
> 
>> that were not removed with selection. Maybe some stations? Does
>> this
>> problem remain also with aven .3d export?
>> It would be great if we could find this bug before therion goes
>  to
> 
>> debian release.
>> S.
>> On Mon, 1 Feb 2021 at 10:17, Benedikt Hallinger
>> <beni at hallinger.org>
>> wrote:
>> Checked it, looks good for me (data selection, and pdf map
>  printout
> 
>>> with
>>> people showing up again), with one exception:
>>> - I source all of the cave's data. (ok)
>>> - Then i select jsut a part of it. (ok)
>>> - The lox output contains just the selected part (ok)
>>> - The altitude coloring is all the same, despite having
>  significant
> 
>>> altitude changes in the dataset.
>>> The reason seems to be that the coloring is done according in
>>> relation
>>> to ALL the cave, not just the selected parts - in comparison
>  to
> 
>> the
>> entire system the altitude difference is negligible, but i
>  expected
> 
>>> the
>>> lox to generate the altitude band according to the actual
>  min/max
> 
>> values
>> of the selected dataset.
>> $ therion -v
>> therion 5.5.6 (2020-12-27)
>> - using Proj 7.2.1, compiled against 7.2.1
>> But: therion compile cdf201b5bf921 has the same behaviour.
>> Am 2021-01-27 8:59, schrieb Benedikt Hallinger:
>> I just did apt-get update, and see 5.5.6ds1-5
>> That is the old version, right? I do wait for 5.5.6ds1-6 ?
>> Am 2021-01-26 16:16, schrieb Wookey:
>> On 2021-01-24 14:40 +0100, Benedikt Hallinger wrote:
>> Wookey, when is this expected to appear in testing?
>> I would test it
>> It's there now.
>> Wookey
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> 
> Links:
> ------
> [1] http://hirlatzhoehle.th
> [2] http://zubringer.th
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