[Therion] Eurospeleo 2018

2018-08-21 Thread Stacho Mudrak via Therion
Hi everybody, eurospeleo meeting in Austria starts tomorrow. Me and Martin (Budaj), we are leaving there tomorrow and we will be there until Surveying workshop on Sunday afternoon. If you are interested, we could meet at welcome ceremony. S. ___ Therio

Re: [Therion] Fix station point using only 2D

2018-08-21 Thread Xavier Pennec via Therion
The altitude needs indeed to be given, but you should also specify that it is highly unreliable by giving it a every high standard deviation, like: fix MyRadioLocation   accurate_x_coord   accurate_y_coord approximate_altitude 3 3 1000 # stddev of 3m in x and y and 1000m in z This should guaranty

Re: [Therion] Fix station point using only 2D

2018-08-21 Thread Martin Sluka via Therion
Add label altitude to that station and use it. Odesláno z iPhonu 21. 8. 2018 v 11:46, Henry.Bennett--- via Therion : > Assuming that you've got another fix for the entrance then you should be able > to get the height for the end station. Just look at the .3d file. That will > give you the

Re: [Therion] Fix station point using only 2D

2018-08-21 Thread kevin dixon via Therion
Adam, Radio-location can give you depth but accuracy is not too good. How have your surface positions at the entrance(s) and the radio location been determined ? Professional GNSS (~3cm), DGPS(~1m) or hand held (~3m) ? I have radio-location fixes at the far end of a system to control any accumula

Re: [Therion] Fix station point using only 2D

2018-08-21 Thread Henry.Bennett--- via Therion
Assuming that you've got another fix for the entrance then you should be able to get the height for the end station. Just look at the .3d file. That will give you the relative altitude at the end - just use that. Henry -Original Message- From: Therion On Behalf Of Adam Pyka via Therio

[Therion] Fix station point using only 2D

2018-08-21 Thread Adam Pyka via Therion
Hi all, How to 'fix' the survey station point (to morph the cave plan) having only 2D coordinates? Using the radiolocation we get (with quite good accuracy) the station point position which is about 150m beyond the estimated location we get from surveying. So now I wanted to use this position to