Object-oriented and integrated spatial data model for managing image, DEM,and vector data

The new generation of geographic information systems (GIS) demand the integ rated management of vector image, and DEM data. This paper brings forward a vector, image, and DEM integrated spatial data model on the basis of the o bject-oriented idea. It also discusses the implementation method of this in tegrated spatial database management system. The spatial database managemen t system has been used in the construction of the China Spatial Data Infras tructure as the base of a GIS software package, GeoStar. It reveals that th e system has high efficiency and the feasibility to manage national, provin cial, and city spatial data of multiple-scales and multiple-sources.