On 09/06/15 21:24, Martin Sluka wrote: > 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. > They refer to it as EDM device, that is all I know, and the data comes out in the format of the previous emails, we have 2 known co-ordinates on the survey, one GPS one calculated from more traditional cave survey techniques
Andrew
