TABLE 1. Technical parameters of the four different analyses performed on the Molfetta tracksite.

UAV model Tarot FY680 Pro DJI Phantom 4 DJI Phantom 4 CR Photogr.
Height (m) 15 10 30 1
Coverage area (sq m) 3880 1770 10900 3.25
Data collection duration (min) 12' (3 flights of 4') 6' 30'' 4' 30'' 10 '
Processing time 9h 5h 30' 4h 9h
Dense point cloud number (millions) 109 35 25 17
Point density (pt/sq m) 28092.7835051547 19774.011299435 2293.5779816514 5248923.0769
Average linear distance between points (mm) 5.96 7.11 20.88 0.43648055
Ortophoto resolution (pixel) 17687x12750 10759x11207 9382x7016 9666x9327
Ortophoto pixel size (mm) 3.75 4.57 14 0.261
DEM resolution (pixel) 23101x21897 6089x6453 6381x4817 4873x4846
DEM pixel size (mm) 7.5 9.15 28.2 0.521
Ground resolution (mm) 5 10 25 0.261