WG: Wanted: Flag to exclude certain legs from loop closure algorithm
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.
Hi Michael, You might find some useful information in old discussions, eg: http://therion.speleo.narkive.com/JoMgAJuX/standard-deviation-and-survey-gra... 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/ -------------------------------
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-gra...
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
Thanks, Xavier! This has worked. Any idea what Therion's "default grade" is if I do not specify anything? Regards, Michael. -----Ursprüngliche Nachricht----- Von: Therion <therion-bounces@speleo.sk> Im Auftrag von Xavier Pennec via Therion Gesendet: Freitag, 15. Juni 2018 13:51 An: therion@speleo.sk Cc: Xavier Pennec <Xavier.Pennec@inria.fr> Betreff: Re: [Therion] WG: Wanted: Flag to exclude certain legs from loop closure algorithm Hi Michael, You might find some useful information in old discussions, eg: http://therion.speleo.narkive.com/JoMgAJuX/standard-deviation-and-survey-gra... 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
participants (3)
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Martin Sluka -
Michael -
Xavier Pennec