Check manual of Survex - survex.com Martin S.
Odesláno z iPhonu 15. 6. 2018 v 13:50, Xavier Pennec via Therion <therion@speleo.sk>: > Hi Michael, > > You might find some useful information in old discussions, eg: > http://therion.speleo.narkive.com/JoMgAJuX/standard-deviation-and-survey-grade > > The best would be to specify first which general accuracy you estimate for > "normal" legs, eg: > * grade 3 for unreliable surveys, > * grade 5 for relieable ones. > > Assuming grade 5, the statement would be: > > data normal from to length compass clino ignoreall > > grade BCRA5 ## Stddev of normal legs > WGB26 WGB27 20.5 30 0 > > # This leg below has perfect measurements > sd length 0 meter > sd compass 0 degrees > sd clino 0 degrees > WGB27 WGB28 17.1 95 0 > > grade BCRA5 ## Back to the stddev of normal legs > WGB28 WGB29 9.5 120 0 > > > If this does not work, try 0.0001 instead of zero as I remember having > problems with vanishing stddevs. > > Xavier > >> Le 15-Jun-18 à 13:29, Michael via Therion a écrit : >> Hello Ben, >> Thanks for the hint to use "SD" but I need some more help with that. >> >> For example, I want *only* leg from WGB27 to WGB28 to exclude from >> modification by Therion's loop closure algorithms. >> What statements do I need to insert at what places to ensure that? >> >> data normal from to length compass clino ignoreall >> >> WGB26 WGB27 20.5 30 0 >> WGB27 WGB28 17.1 95 0 >> WGB28 WGB29 9.5 120 0 >> >> Michael. >> >> _______________________________________________ >> Therion mailing list >> Therion@speleo.sk >> https://mailman.speleo.sk/listinfo/therion > > -- >> ------------------------- >> Xavier Pennec >> Senior Research Scientist / Directeur de recherche >> Asclepios project-team, INRIA Sophia-Antipolis >> 2004 Route des Lucioles, BP93 >> F-06902 Sophia-Antipolis Cedex, France >> +33 4 92 38 76 64 >> +33 6 78 35 16 90 >> http://www-sop.inria.fr/asclepios/ >> ------------------------------- > > _______________________________________________ > Therion mailing list > Therion@speleo.sk > https://mailman.speleo.sk/listinfo/therion _______________________________________________ Therion mailing list Therion@speleo.sk https://mailman.speleo.sk/listinfo/therion
