RE: Trimble base station setup over unknown mark

@williwaw?ÿ

We are lucky here in NZ that almost all work (boundary, topo, dirt works and even the odd building setout that shouldn't be) is done on local transverse mercator projections that sound similar to the LDPs I hear about on here so 99% of "calibrations" are just tweaking the here base coordinate to be in terms of the control points with published coordinates from our equivalent of your NGS

?ÿ

True site calibrations are really only for the odd legacy construction project where there are multiple control points you know are tight and even then if it's not a massive site you have to ask yourself if using the total station would be safer.