Low-Altitude Photogrammetry and Remote Sensing in UAV for Improving Mapping Accuracy

Table 2

Precision analysis of digital line drawing in different test areas.

Measurement area		Median error	Maximum error	Minimum error	Number of checkpoints	Meets the mapping scale
1^st part of the surveyed area	XY	0.311	0.742	0.111	90	1 : 1000
	Z	0.294	0.482	−0.641	64	1 : 1000
2^nd part of the surveyed area	XY	0.643	1.022	0.216	70	1 : 2000
	Z	0.554	1.262	−1.023	56	1 : 2000