A valid data format that Survex doesn't accommodate?

[Olly Betts]

On Tue, Aug 23, 2016 at 12:08:08PM +0100, Andrew Atkinson wrote:
> At one of the many Eurospeleo survey meetings, people raised the survey
> method of taking 2 sets (not always full) of instruments which generally
> were used for forward and back sights. However, not always; they could be
> swapped or both read the same way.
> We could not think of a way to currently input this, especially while
> keeping track of the instruments. Maybe there is a way, but if there is not
> what about (I can then open a ticket....)

You should be able to put the second set in as "backcompass",
"backclino", and "backtape" ("backtape" was added in 1.2.25, if you want
to be able to omit one of "tape" or "backtape" you need 1.2.27).  You
just need to calibrate them so they actually work as a second forwards
set - for example, if there's no actual calibration for the second set
of instruments then this should work I think:

*calibrate backcompass 180
*calibrate backclino 0 -1

The backsight support allows you to omit one or other of the pairs of
readings, and for the instruments to be calibrated differently, use
different units, or even for one of the clinos to read in %.

Did you already ask me about this on the CUCC expo?  I'm fairly sure I
suggested this to someone recently!

Cheers,
    Olly