Enclosed example of what I mean. The output file of survex shows the cave as it should be, but in the .th2 file the station positions and the centreline are distorted making it difficult to draw scraps. I am a new user to Therion and cannot understand the presentation of centerline data in the map file. Stations that I fix with true data are plotted correctly but other data is skewed, especially pure up or down stations. Can you advise where I am going wrong Chris -------------------------------------------------------------------------------- _______________________________________________ Therion mailing list Therion@speleo.sk http://mailman.speleo.sk/mailman/listinfo/therion

Martin, Many thanks, my error was using grads instead of degrees. I included input .th2 so as to output the scraps which were not incl in my file Regards Chris -----Original Message----- From: Martin Sluka Sent: Friday, February 17, 2012 5:53 PM To: List for Therion users Subject: Re: [Therion] xvi format Hi, 1. there is no any reason to input .th2 file to .th file, if you need only centerline. 2. you define in .th file: "units compass grads" and "units clino grads" but in your data you use degrees! grads means: http://en.wikipedia.org/wiki/Grad_(angle) degrees means: http://en.wikipedia.org/wiki/Degree_(angle) Martin On 17.2.2012, at 17:33, chris and ita wrote:

Enclosed example of what I mean. The output file of survex shows the cave as it should be, but in the .th2 file the station positions and the centreline are distorted making it difficult to draw scraps.

I am a new user to Therion and cannot understand the presentation of centerline data in the map file. Stations that I fix with true data are plotted correctly but other data is skewed, especially pure up or down stations. Can you advise where I am going wrong Chris

_______________________________________________ Therion mailing list Therion@speleo.sk http://mailman.speleo.sk/mailman/listinfo/therion <dill.3d><dill.svx><thconfig.txt><dill.th><dill.th2> _______________________________________________ Therion mailing list Therion@speleo.sk http://mailman.speleo.sk/mailman/listinfo/therion

_______________________________________________ Therion mailing list Therion@speleo.sk http://mailman.speleo.sk/mailman/listinfo/therion

One thing more: if you use vertical survey legs use in centerline the command "plumb" - in your case "infer plumbs on" from thbook: infer <what> <on/off> ◃ ‘infer plumbs on’ tells the program to interpret gradients ±90 ◦ as UP/DOWN (this means no clino corrections are applied). ‘infer equates on’ will case program to interpret shots with 0 length as equate commands (which means that no tape corrections are applied) And take care of fix points, there is no definition of coordinate system you use in you .th file. Martin