TarquinHave a look at
https://therion.speleo.sk/wiki/faq#how_do_i_specify_a_main_entrance_and_also_the_other_entrancesto
find out more about specifying what is a cave and what is just another
entrance. To see what Therion is interpreting from your input, cave-list and
survey-list are a good compliment to the map output statistics. Surface survey
is not counted as cave survey, so the statistics are not reported on map
outputs. Yes you do need to structure your data to define which trips belong to
which caves. I would also have an overall surface survey to contain all of the
surface trips. Also, flags surface and flags not surface are required to
distinguish cave passage from from surface survey. I prefer to also make sure
the surface survey is in its own centreline (or own survey) if it is more than
just once or two legs. In general I find it preferable to keep surface survey
for surface (including isolated features like shafts), and create a new trip
file for each cave. This helps maintain a clear separation of data for
subsequent survey processing and statistics gathering. BruceSent from my
Samsung Galaxy smartphone.
-------- Original message --------From: Tarquin Wilton-Jones via Therion
<[email protected]> Date: 19/04/19 06:33 (GMT+12:00) To: [email protected]
Cc: Tarquin Wilton-Jones <[email protected]> Subject: [Therion]
How to get the right count for cave lengths Hi,I have nearly completed the
total survey for the system I am mapping. Intotal, there are a series of little
caves (actually mines, but I willstick with the word "caves" because it is
clearer), a blind surfaceshaft, and a couple of significantly long caves. In
total, these weresurveyed over a series of 6 trips. On one of those trips, we
surveyedthe surface, and any short fragments of passage that we encountered
thatway. One of those fragments turned out to be one of the major caves.
Themajor cave's survey was subsequently completed on another trip, but itsfirst
few metres are included in the surface survey.I am used to Survex. Each of the
surveying trips has its own .th file:overall.th ("input"s all the other
files)surface1/surface1.th (contains the entrances to several fragments, andthe
first 2 legs of cave 1)surface2/surface2.th (contains the blind shaft's plumbed
depth and someother entrances)cave1/cave1.th (does not contain any entrances,
but is a long cave,connected to the "cave 1 legs" in surface1.thcave2/cave2.th
(contains the first part of cave2, and its entrance)cave3/cave3.th (contains
cave3, with two entrances)cave2ext/cave2ext.th (contains the second part of
cave2)Cave1 is connected to cave2.Each entrance is marked using "station 2
Cave1 entrance" in thecentreline section of the file where it is defined.
Survex only displaysaggregate statistics. Therion tries to identify "caves",
which is aconcept I am not used to.I had hoped that Therion would be smart
enough to see that caves areconnected to each other, and work out the connected
lengths. But itseems that it only works out the length of the files within the
samesurvey. Cave1 doesn't get any length. Cave2 gets only the length
fromcave2.th - the length of the cave2ext and cave1 are not included.How do I
make Therion realise what caves are connected? Do I need to putthem into a
structure like this?survey overallsurvey cave1_2 -entrance 2@cave2 -name "Caves
1 and 2"input cave1.thinput cave2.thinput cave2ext.thendsurveyendsurveyAnd if
so ... how do I tell it that *part* of the cave lies within thesurface survey
file? Do I need to split the surface survey up intoparts, one of which is the
entrance to cave1?Separately, when using "statistics topo-length on", it
ignores thesurface survey legs, which is quite unfair for the person who
surveyed 1km of surface to link all of the entrances - they get no credit at
all.Can it be asked to include surface legs in the topo-length calculationsfor
survey credits?Thanks for any
advice.Tarquin_______________________________________________Therion mailing
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