Try to arange your surveys to a structure with several layers (“name spaces”). Martin Odesláno z iPhonu 21. 4. 2019 v 5:58, Bruce Mutton <bruce@tomo.co.nz>:
Tarquin Have a look at https://therion.speleo.sk/wiki/faq#how_do_i_specify_a_main_entrance_and_also... to 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.
Bruce Sent from my Samsung Galaxy smartphone.
-------- Original message -------- From: Tarquin Wilton-Jones via Therion <therion@speleo.sk> Date: 19/04/19 06:33 (GMT+12:00) To: therion@speleo.sk Cc: Tarquin Wilton-Jones <tarquin.wilton-jones@ntlworld.com> 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. In total, there are a series of little caves (actually mines, but I will stick with the word "caves" because it is clearer), a blind surface shaft, and a couple of significantly long caves. In total, these were surveyed over a series of 6 trips. On one of those trips, we surveyed the surface, and any short fragments of passage that we encountered that way. One of those fragments turned out to be one of the major caves. The major cave's survey was subsequently completed on another trip, but its first 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, and the first 2 legs of cave 1) surface2/surface2.th (contains the blind shaft's plumbed depth and some other entrances) cave1/cave1.th (does not contain any entrances, but is a long cave, connected to the "cave 1 legs" in surface1.th cave2/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 the centreline section of the file where it is defined. Survex only displays aggregate statistics. Therion tries to identify "caves", which is a concept I am not used to.
I had hoped that Therion would be smart enough to see that caves are connected to each other, and work out the connected lengths. But it seems that it only works out the length of the files within the same survey. Cave1 doesn't get any length. Cave2 gets only the length from cave2.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 put them into a structure like this? survey overall survey cave1_2 -entrance 2@cave2 -name "Caves 1 and 2" input cave1.th input cave2.th input cave2ext.th endsurvey endsurvey
And if so ... how do I tell it that *part* of the cave lies within the surface survey file? Do I need to split the surface survey up into parts, one of which is the entrance to cave1?
Separately, when using "statistics topo-length on", it ignores the surface survey legs, which is quite unfair for the person who surveyed 1 km 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 calculations for survey credits?
Thanks for any advice.
Tarquin _______________________________________________ Therion mailing list Therion@speleo.sk https://mailman.speleo.sk/listinfo/therion _______________________________________________ Therion mailing list Therion@speleo.sk https://mailman.speleo.sk/listinfo/therion