Quality Assessment of Four DEMs Generated Using In-Track KOMPSAT-3 Stereo Images

Table 3

Reference data parameters (from the NGII [10]).

Reference data		NGII DEM	NGII orthoimage	SRTM DEM (single-arc)
Projection		Transverse Mercator
Spheroid datum		GRS 1980
Central datum		N 38°00′00′′, E 127°00′00′′
GSD (m)		5	0.25	30
Horizontal error (m)		≤10	≤0.5	≤12.6
Height error	RMSE (m)	4.9	-	5.2
	Min/max (m)	-23.6/0	-	-21.4/0
	Mean/SD (m)	-0.7/4.8	-	-3.0/4.3

GSD, ground sample distance; RMSE, root mean square error; SD, standard deviation; NGII, National Geographic Information Institute; DEM, digital elevation model; STRM, Shuttle Radio Topography Mission; GRS, Geodetic Reference System