5Gruen A, Xinhua W. Creation of a 3D city model of Zurich with CC-modeler[A]. In: Proceedings of Spatial Information Science Technology and Its Application--RS GPS Gis Their Integration and Applications, Wuhan, 1998. 249--259.
6JoAnna R. Decision support systems, environmental model,visualization systems and GIS [ OL ] . http://hamboo. mluri.sail. ac: uk/-- jo/litrev/.