[Therion] Which line are LRUDs perpendicular to?

[Markus Boldt]

Hi, 

it is only a thinking..

If you began to servey a cave, you take your first LRUD-Data at the first
point. So it must be in a way that Therion estimate the LRUD-Data at the
point where they are taken from. 

If not, then the first (e.g. A1 to A2 would only exist as a traverse line
without definitions of the walls. 

Greetings 

Markus 

 

 

Von: therion-bounces at speleo.sk [mailto:therion-bounces at speleo.sk] Im Auftrag
von Bill Gee
Gesendet: Samstag, 12. Dezember 2015 15:47
An: List for Therion users
Betreff: [Therion] Which line are LRUDs perpendicular to?

 

Hello everyone -

 

The recent discussion about LRUDs brings up another question I have. Take
some example data ...

 

========

data normal from to tape compass clino backcompass backclino left right up
down

 

# Main survey shots

A1 A2 8.4 72.5 -52 252 +53 3 5 3 6

A2 A3 6.7 67 -10 248 +10 2.2 1 2 1.4

A3 A4 48.0 28 +2 208 -1.5 4 5 0.7 1.1

========

 

For each shot the LRUD data is taken at the "to" station. Does Therion
assume this data is perpendicular to the line going to the next station? Or
is it perpendicular to the line coming in from the previous station?

 

At station A2 - Does Therion treat the LRUD data as perpendicular to A1-A2
or as perpendicular to A2-A3?

 

Thanks - Bill Gee

 

 

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