[Therion] Fwd: Diving data loop closures altering depths
This is a Survex issue but may also be of interest to this list. Plus the Survex list does not accept my 7 KB of data as it says my post is too big. Posting the data here for lack of a capable list for Survex. Footleg -- Forwarded message -- From: "Footleg" Date: 17 Jun 2013 14:38 Subject: Diving data loop closures altering depths To: "survex" Cc: Trying to track down why some underwater data was several metres higher than a sump water surface, I discovered that closing loops between stations at the same depth in diving data alters the depth of surrounding data. This was not expected! I've attached a fragment of the data which illustrates this. Without the loop closed: Station entrance.030 is at depth -5.30 Closing the loop: *equate Entrance.010 EntranceLoopNorth.019 where both these stations are at the same depth, but horizontally displaced (a common scenario as depths are absolute but length and compass errors accumulate in diving data), now: Station entrance.030 is at depth -5.48 Is this a bug, or have I not understood something here? Footleg -- next part -- An HTML attachment was scrubbed... URL: <http://mailman.speleo.sk/pipermail/therion/attachments/20130617/0d71b827/attachment.html> -- next part -- A non-text attachment was scrubbed... Name: Keld_Head_divinglooperrortest.svx Type: application/octet-stream Size: 7993 bytes Desc: not available URL: <http://mailman.speleo.sk/pipermail/therion/attachments/20130617/0d71b827/attachment.obj>
[Therion] Fwd: Diving data loop closures altering depths
+++ Footleg [2013-06-17 18:45 +0100]: >This is a Survex issue but may also be of interest to this list. Plus the >Survex list does not accept my 7 KB of data as it says my post is too big. >Posting the data here for lack of a capable list for Survex. It doesn't accept any attachments. By policy. 'Too big' is the generic mailman message. It probably make sense to allow small attachments, but we should discuss that on the relevant list. Wookey -- Principal hats: Linaro, Emdebian, Wookware, Balloonboard, ARM http://wookware.org/
[Therion] Fwd: Diving data loop closures altering depths
That is why I posted the data inline as plain text. But that was bounced as my message exceeded 40KB. Yet my attachment is only 7 KB. On 17 Jun 2013 19:05, "Wookey" wrote: > +++ Footleg [2013-06-17 18:45 +0100]: > >This is a Survex issue but may also be of interest to this list. Plus > the > >Survex list does not accept my 7 KB of data as it says my post is too > big. > >Posting the data here for lack of a capable list for Survex. > > It doesn't accept any attachments. By policy. 'Too big' is the generic > mailman message. > > It probably make sense to allow small attachments, but we should discuss > that on the relevant list. > > Wookey > -- > Principal hats: Linaro, Emdebian, Wookware, Balloonboard, ARM > http://wookware.org/ > ___ > Therion mailing list > Therion at speleo.sk > http://mailman.speleo.sk/mailman/listinfo/therion > -- next part -- An HTML attachment was scrubbed... URL: <http://mailman.speleo.sk/pipermail/therion/attachments/20130617/98d9da48/attachment.html>