Clearly, WLT provides a remarkably better solution in "round-trip" conditions. However, there is
still a 0.07m error that will affect the overall model position integrity. With this in mind, it is
unlikely that most buildings construction professionals will be walking around such a large
perimeter from their area of inspection. Therefore, it can be expected that the most influential
drift error effects come from the observed conditions in scenario 2.
16
