Hi Gerrie, please flag the duplicated centerlines as "duplicated". Like this: data normal from to compass clino length ignoreall 37.1 31.13 187.92 -41.27 5.226 > 37.2 37.1 168.83 -41.95 4.809 > flags duplicate #ON 37.2 37.3 345.60 36.15 2.730 > # removed from cave length calculation 37.3 37.4 348.42 29.22 6.689 > # removed from cave length calculation flags not duplicate #OFF 37.4 37.5 76.84 49.71 2.643 > 37.5 37.6 354.51 -3.27 4.866 > ... Regards, dirk -----Ursprüngliche Nachricht----- Von: therion-bounces@speleo.sk [mailto:therion-bounces@speleo.sk] Im Auftrag von therion-request@speleo.sk Gesendet: Sonntag, 7. April 2013 12:00 An: therion@speleo.sk Betreff: Therion Digest, Vol 88, Issue 3 Send Therion mailing list submissions to therion@speleo.sk To subscribe or unsubscribe via the World Wide Web, visit http://mailman.speleo.sk/mailman/listinfo/therion or, via email, send a message with subject or body 'help' to therion-request@speleo.sk You can reach the person managing the list at therion-owner@speleo.sk When replying, please edit your Subject line so it is more specific than "Re: Contents of Therion digest..." Today's Topics: 1. Help! Large chamber problem (Gerrie Pretorius) 2. Re: Help! Large chamber problem (Martin Sluka) ---------------------------------------------------------------------- Message: 1 Date: Sat, 6 Apr 2013 21:21:52 +0200 From: Gerrie Pretorius <gw.pretorius@gmail.com> Subject: [Therion] Help! Large chamber problem To: therion@speleo.sk Message-ID: <CAOfUBN3xfNPtd28D5C51nyjyOocaZpJ-5q7mbfPnTQmC2FqJHg@mail.gmail.com> Content-Type: text/plain; charset="iso-8859-1" Hi I am fairly new to Therion, i worked through all the tutorials i could find and i am now busy doing my first actual survey with therion. The cave i am surveying has a large main chamber, about 70m wide and 100m long. The disto cant reach the edges of the chamber from the centre of the chamber, so as a result i surveyed several loops inside this one chamber. although i enclosed all these loops in single cave wall, it appears as if therion still sees this as multiple passsages and calculates the length of the cave accordingly so how do i approach this large chamber problem from a therion perspective? thank you in advance. Regards Gerrie Pretorius South Africa