Table 3.

UAV flight and image acquisition specifications.

Category	Specifications
Number of UAV image datasets	Three flights using network RTK GNSS positionings (RTK1, RTK2, and RTK3), three flights using standalone GNSS positioning (GNSS1, GNSS2, and GNSS3), and three post-mission processing datasets using PPP positioning on images with standalone GNSS positioning (PPP1, PPP2, and PPP3)
Number of images acquired per flight	77
Flight height	110 m above ground level at starting point of flights
Flight duration	4 min, 57–59 s
Forward overlap	75%
Side overlap	70%
Number of images used for image mosaicking	73