Experiment and Application of NATM Tunnel Deformation Monitoring Based on 3D Laser Scanning

Table 1

Precision information of Z + F imager 5010x.

Deviation	Reflectivity
	14% (black) (mm)	37% (gray) (mm)	80% (white) (mm)
10 m deviation	0.5	0.4	0.3
25 m deviation	1.0	0.6	0.5
50 m deviation	2.7	1.2	0.8
100 m deviation	10.0	3.8	2.0

The deviation in the table refers to the root mean square error.