Hi Phil, Yes, you can do that by setting the standard deviation for the survey as a whole, and then for each leg that requires it.
From the Therion book:
sd <quantity list> <value> <units> ◃ sets the standard deviation for the given measurements. The Quantity list can contain the following keywords: length, tape, bearing, compass, gradient, clino, counter, depth, x, y, z, position, easting, dx, northing, dy, altitude, dz. The sd command affects all following legs, so for a single leg, remember to set the sd back to your default again, eg:- sd compass 5 degrees sd clino 2 degree 1 2 209 10.88 -4 sd compass clino 0.5 degrees A small difference in SD makes a big difference in the distribution of error, so suggest experiment with different values. Best regards, Ben -----Original Message----- From: Therion [mailto:therion-bounces@speleo.sk] On Behalf Of Philippe Vernant via Therion Sent: 14 February 2017 23:34 To: List for Therion users Cc: Philippe Vernant Subject: [Therion] weight on distorsion depending on survey Hi guys, Could not find the answer, so popping up to ask you the question. Is there a way to say that one survey should bear most on the distorsion ? I have a diving survey which is less accurate than the “regular” surveys, can I put some weight on that survey so it will be more distorted ? Thanks, Phil _______________________________________________ Therion mailing list Therion@speleo.sk https://mailman.speleo.sk/listinfo/therion