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@speleo.sk [mailto:therion-bounces@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 ...

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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

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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