Table 1.

Statement of datasets.

SN of Datasets	1	2	3
Position	Vaihingen, Germany	San Diego, CA, USA	San Diego, CA, USA
DSM collection	Airborne	Airborne	Airborne
Texture-images collection	Airborne	Satellite	Satellite
Ground Truths of DSM	YES	NO	NO
Test-points of facades?	NO	By Google Earth	By Google Earth
Resolution of DSM	0.09 m	1.0 m	1.0 m
Resolution of Texture-images	-	1.0 m/0.3 m	1.0 m/0.3 m