ISPRS, Vol.34, Part 2W2, “Dynamic and Multi-Dimensional GIS”, Bangkok, May 23-25, 2001 
CCGIS contains and develops the 2D GIS functions of GeoStar, 
such as the multimedia query, representation, analysis and 
decision making, and so on. Especially, any other GIS or MIS 
systems also can be related to CCGIS with ease. 
5 CONCLUDING REMARKS 
Aiming at the requirements of digital city development, CCGIS 
just provides an initial solution. After several pilot projects like 
Shenzhen, Beijing and Shanghai, it is proved that the 3D 
modelling method and data structure are effective, but for more 
large-scale applications, many key technologies have to be 
solved at first, for instance the application of large OODBMS or 
ORDBMS, the fast updating and dynamic management of 3D 
city model, the long distance transfer of large amount of data, 
more high efficient and more realistic 3D representation method, 
etc.. 
ACKNOWLEDGEMENT 
This project is supported by the FOK YING TUNG EDUCATION 
FOUNDATION (No.71017) and NSFC (No.40001017). The 
authors appreciate Mr. Sui Haigang, Mr. Zhong Zheng, Mr. 
Huang Duo, Miss Zhang Shanshan, Miss Li Xiafei and many 
other colleagues of Wuhan Geo-Informatics Ltd. for their support 
during the R&D of this project. 
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