Checked the Jorc appendix Looks like the GPS may not have been...

Checked the Jorc appendix




Looks like the GPS may not have been used for RL's. Cannot imagine a DTM being that inaccurate so there is a mystery only the company can solve, Perhaps...

Ran a series on NS profiles over the Crean Hoschke area in Google earth which showed some 5m of elevation variation or generally less locally.



Some variation but not ~30m between 40m spaced holes as announced.
GE is not too accurate in my experience but does give relative elevations which are reasonable. +-20m should be visible IMO.

I would basically disregard the RL's provided in this situation. No idea why they are like that but glitches occurr alll the thyme.