Table 2.

Correlation (R², bottom triangle) and RMSE (top triangle) values between the digital terrain models computed over the 1173 microplots for the 5 flights as well as that derived from the real time kinetics GPS on the sowing machine.

R2/RMSE (cm)	Sowing	DaS 139∗	DaS 152∗	DaS 194	DaS 216	DaS 225∗
Sowing	-	2.6	7.2	3.4	2.6	6.0
DaS 139∗	1.00	-	7.2	4.5	2.9	5.0
DaS 152∗	0.96	0.95	-	9.2	7.4	9.8
DaS 194	0.99	0.99	0.95	-	3.8	6.8
DaS 216	0.99	0.99	0.96	0.99	-	6.0
DaS 225∗	0.97	0.97	0.91	0.97	0.96	-

^∗Indicates that the camera was equipped with the 30 mm focal length instead of the 19 mm one.