Could it be that it comes from cs specifications in the same centerline environment?
I have been using multiple datums (e.g lat-long, UTM, old and new lambert coordinate systems for France) for fixing coordinates in a system of multiple caves without any problem. However, I believe that I have a single cs statement per centerline. Indeed, at some point I discovered that the equal statements were now working properly outside the centerline environment, so that I centerlined individually all my pieces of survey, even in the same survey. My 2 bits Xavier Le 19/09/2014 23:10, Bruce a écrit : > We have been using multiple coordinate systems for a number of years, > and it seems to work perfectly. > We mix and match at will between lat-long, NZMG and NZTM (ie old and > new datums) within the same cave survey and between cave surveys. > So, Footleg, unless you have other reasons to do so, there is no need > to convert your old datum coords to new datum coords. > There seem to be a couple of rules to keep things working smoothly. > Have a look at Therion Book pg 14 and 46-47 and keep in mind > the distinction between input and output. > > 1. > Each centerline with fix statement(s) should have a date and cs > specification (prior to the fix I think). > 2. > So that you can be sure of the cs applied to the outputs, specify > the output cs that you want in the th-config (not in a layout). > 3. > I have avoided using cs in layout, as, even if Therion is > consistent in the way it applies it, in the situation where there > are multiple coordinate systems in use, it is not abundantly clear > to a user which cs will be used, for example where > some centrelines have no explicit cs or for the output. (Although > reading Therion Book pg 47, maybe that is for Atlas outputs - been > a while, I forget). > > Now that we have output variables in 5.3.15 that echo the cs that has > been used for output, it will be possible to have this stamped in the > pdf header. I have a 'proof that it works' layout drafted up, and one > day I will make a modular set of layouts to make it readily useable > The first file embedded on this page > http://therion.speleo.sk/wiki/doku.php/templates > (ie > http://therion.speleo.sk/wiki/lib/exe/fetch.php/templates:thconfig-templatesimple.txt) > shows how I use it in a th-config file. > Bruce > > ------------------------------------------------------------------------ > *From:* therion-bounces at speleo.sk [mailto:therion-bounces at speleo.sk] > *On Behalf Of *Footleg > *Sent:* Saturday, 20 September 2014 4:13 a.m. > *To:* List for Therion users > *Subject:* Re: [Therion] Combining caves using different co-ordinate > systems > > I had put one cave using a cs and gps fix coordinates into one survey > block in a .th file. Then a second cave using a different cs and gps > fix coordinates in a second .th file. > > My project then uses a master.th <http://master.th> file which inputs > both of these. If I run my config on either of the individual files > then they appear at the correct place on Google Earth from an output > kml file. If I include both caves then they appear in different > places. The one I include first is in the correct place. If I swap the > order they appear in the master.th <http://master.th> file then this > confirms the first one is alway put in the correct place, and the > second is positioned using the cs of the first one. > > The same in a lox model file (except I cannot confirm which is > correct, but I see them in different places when I give them the same > entrance location to test this). > > Footleg > > On 19 Sep 2014 14:33, "Andrew Atkinson" <andrew at wotcc.org.uk > <mailto:andrew at wotcc.org.uk>> wrote: > > You can use cs in config file, either inside layout, or outside > layout (most likely what you want to do) to control the output > co-ordinate system, which I think is what you are trying to do? > > Andrew > > On 19 Sep 2014 14:00, "Footleg" <drfootleg at gmail.com > <mailto:drfootleg at gmail.com>> wrote: > > I have been converting a project from an old datum to a more > recent > one following the issuing of new maps using the newer datum. > So all my > entrance GPS coordinates changed. I updated the cs statements > in my > survey data files and my KML output is still in the correct > place. So > all was looking good. Then I discovered that if I include a > survey in > the old cs with one using the new cs then Therion appears to treat > both caves as having the same cs. Whichever cs is used by the > first > included cave is applied to subsequent caves too. Is there a > way to > deal with this? > > Footleg > _______________________________________________ > Therion mailing list > Therion at speleo.sk <mailto:Therion at speleo.sk> > http://mailman.speleo.sk/mailman/listinfo/therion > > > _______________________________________________ > Therion mailing list > Therion at speleo.sk <mailto:Therion at speleo.sk> > http://mailman.speleo.sk/mailman/listinfo/therion > > > > _______________________________________________ > Therion mailing list > Therion at speleo.sk > http://mailman.speleo.sk/mailman/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/ > ------------------------------- -------------- next part -------------- An HTML attachment was scrubbed... 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