CyberCity GIS and Its Application
HUANG Duo,SUI Hai-gang, ZHANG Ye-ting apping and Remote Sensing, Wuhan University,Wuhan 430079,China)
The term 'CyberCity' is used to characterize the digital representation of a city that enables a person to explore and interact, in cyberspace, with the vast amounts of environmental and cultural information gathered about the city.The CyberCity not only shows data in three dimensions, i.e. the 3D city models in most cases, but also presents photorealistic surface description. Since its distinct realistic and informative properties in 3D representation, analysis and modeling, it is increasingly used in urban data handling and service, such as the emergency response, the virtual tourism and intelligent transportation, urban planning and design, electronic business, and so on. A CyberCity GIS platform (called CCGIS) is developed by LIESMRS of Wuhan University, and applied in a series of pilot CyberCity GIS projects. Through these practices, most of the critical issues about the construction of CyberCity GIS were taken into consideration. After introducing the main characteristics of the CCGIS software, this paper discusses the critical engineering problems about the 3D city models, especially about the degree of reality, the modeling scheme and the quality control methods.