I’ve just run changes to entrance-boulder in both therion and survex. Below results just for first leg 1-2

No date+compass calib= 133.6 deg survex// 132.6 deg therion

Date + no compass calib=131.0 deg survex// 130.1 deg therion

No date+no compass calib=131 deg survex// 130deg therion

Date + compass calib=133.6 deg survex// 132.7 deg therion

So clearly therion is correcting the data 1[] 2[] 13.4[] 131[] 10.0

By always taking one degree off the compass irrespective of what we tell it.

(For information: When calibration used survex= *calibrate compass -2.65 // therion= calibrate compass 357.35)

Does anyone have any ideas where therion is pulling this 1 degree correction from?

Regards,

Alastair Gott.

On 26 Feb 2021, at 07:43, A Gott <alastairgott@gmail.com> wrote:

HI Tarquin and Andrew,

Many thanks for that, We were just lost, I think we'll be able to pick it up from here with your helpful guidance. Should just be a case of looking through the .th files and looking for all the 90's

I hope you are both well.

Al.

On Fri, 26 Feb 2021 at 07:33, Andrew Atkinson <andrew@wotcc.org.uk> wrote:

> DOWN has been mis-converted into +90 rather than -90, when converting
> from Survex format to Therion format.
> Survex:
> 2213 2212 B 3.49 - DOWN
> Therion:
> 2213 2212 3.49 311 90
> I'm guessing that error may turn up elsewhere. consort_climax looks
> similarly wrong.
As a point to note -90 and Down at treated differently for clino
correction, they can be treated ed the same

From the survex manual

"*infer plumbs on" tells cavern to interpret gradients of +/- 90
degrees as UP/DOWN (so it will not apply the clino correction to them).
This is useful when the data has not been converted to have UP and DOWN

Andrew
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