[Therion] WG: Wanted: Flag to exclude certain legs from loop closure algorithm

[Michael]

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 at speleo.sk> Im Auftrag von Xavier Pennec via Therion
Gesendet: Freitag, 15. Juni 2018 13:51
An: therion at speleo.sk
Cc: Xavier Pennec <Xavier.Pennec at 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-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.
>
> _______________________________________________
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> Therion at speleo.sk
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-- 
> -------------------------
> 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/
> -------------------------------

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