Table 2. Comparison between ground measured and UAV-estimated canopy height and diameter.

DOY	Year	Measured vs estimated tree canopy height (m)				Measured vs estimated tree diameter (m)
		intercept	slope	R2	RMSE	intercept	slope	R2	RMSE
130	2015	0.34	0.92	0.73	0.23	-0.22	1.07	0.84	0.19
188	2015	0.57	0.77	0.73	0.26	-0.05	0.97	0.80	0.24
63	2016	-0.10	1.06	0.87	0.16	0.14	0.83	0.81	0.37

Canopy height and canopy diameter of olive trees were measured on DOY 130 and 188 in 2015, and DOY 63 in 2016. The flight altitudes were 70 m (DOY 130 and 188 in 2015) and 50 m (DOY 63 in 2016).