[Therion] Turn through angle data format

[Martin Sluka]

Is it theodolite surveys? Or total station, or…

But as I know, there should be min. two reference points with known coordinates to connect such surveys to. Or use special GPS with precision of 1-2 cm.

Is it this case?

m.



> 9. 6. 2015 v 15:25, Andrew Atkinson <andrew at wotcc.org.uk>:
> 
> every few years I get data in a land survey format, which often does not
> use a magnetic survey but a turned through angle (does it have a proper
> name?) I guess it is not that easy, otherwise this sort of think usually
> gets done.