Table 9.

Artificial areas. Vertical accuracy measures of the three digital surface models in comparison with the airborne laser data.

Artificial Areas	WorldView-2 RPCs-only - ALS data	WorldView-2 GCP-enhanced RPCs - ALS data	ADS 80 - ALS data
Sample size	1,768	1,723	2,248
50% quantile (median) [m]	−4.91	−1.23	−0.07
NMAD [m]	2.47	2.27	1.15
68.3% quantile [m]	−3.81	−0.35	0.29
95% quantile [m]	−1.91	1.38	2.10
RMSE (without outliers) [m]	(n = 1,756) 7.46	(n = 1,692) 4.18	(n = 2,188) 2.82