We are needing to add some 'accuracy' disclaimers to our GeoReferenced PDF that we are creating from uStn.
All of our models are setup with the appropriate Local Projection Coordinates, and these are magically 'transformed' into the Lat/Long coordinates used in the resulting PDF files.
It is this 'transformation' that we need to know how this is performed (eg. crude move/rotation/scale, a more accurate 7 parameters transformation, or an unlikely but most accurate Grid Shift transformation) and what degree of accuracy we can expect over various spatial extents.
Fundamentally, the accuracy of the devices (phones/tablets) used onsite are likely to be the determining factor in the degree of accuracy, but obviously the 'correctness' of the data itself is the first point in determining that.