Currently, the construction and application of 3D City Model (3DCM) is the main tendency of international GIS and its related subjects . Multipurpose 3DCM has a wide application in the fields of achitecture, civil engineering, traffic, geology,city planning, network and multimedia etc. in the future. In addition, with the development of digital earth and cyber city, the constructional concept of 3DCM is becoming more and more important.
The research status is firstly analysed in thi...