Table 5.

Forested areas. Vertical agreement measures of the three digital surface models in comparison with the stereo-measurements.

Forested Areas	WorldView-2 RPCs-only - stereo data	WorldView-2 GCP-enhanced RPCs - stereo data	ADS 80 - stereo data
Sample size	2,007	1,974	2,355
50% quantile (median) [m]	−5.53	−1.85	−1.12
NMAD [m]	2.69	2.34	1.32
68.3% quantile [m]	−4.38	−0.90	−0.58
95% quantile [m]	0.37	3.54	1.95
RMSE (without outliers) [m]	(n = 1,985) 7.19	(n = 1,939) 3.98	(n = 2,306) 2.63