Table 4.

The technical characteristics of measuring instruments (based on [44]).

Instrument	Technical Parameters
Leica NA3003	Measuring distance: 1.3–100 m
	Precision of distance measurement: ± (3 mm + 5 pmm)
	Accuracy per 1 km of double leveling: 0.4 mm (invar staff), 1.2 mm (standard staff)
Trimble VX	Maximum measuring distance: 250 m
	Precision of distance measurement: ± (1 mm + 2 pmm)
	Angular accuracy 1″
Z+F Imager 5010	Maximum measuring distance: 187 m
	Beam divergence < mrad (full angle)
	Beam diameter approx. 3.5 mm per 1 m
	More than 1 million pixel/sec maximum measurement rate