Table 1.

Distances between check pair lines and their statistics.

Registrations	Error Statistics (Unit: Meter)
	MAX	MEAN	RMSE
Coarse registration by initial exterior orientation elements	2.76	1.36	0.84
Coarse registration by Förstner operator and DLT transformation model	1.52	0.61	0.45
Precise registration by extended collinearity equations	0.52	0.24	0.13