简要论述了数字化城市的发展和应用，针对数字城市建设的复杂性，从数字化校园系统建设着手，探讨了开发组件式数字化校园系统的关键技术和整体开发方案，对数字城市进行了有益的尝试和并提供了有益的借鉴。采用Geo-Union系统开发平台，构建了一个数字北大校园系统，对它的系统体系结构、数据库建设、功能设计以及基于WebGIS构件的实现进行了比较详细的探讨。数字北大校园系统集成了校园内各方面的服务信息，将成为北大师生及其他用户极为方便的一个信息渠道，也将成为展示北大形象的一个新的窗口。

Firstly, the development and application of digital city are introduced. Aiming at the complexity of constructing digital city, the key issues and implementation scenario of constructing digital campus based on GIS component are explored, which will give a practical method and useful reference for digital city. Adopting the GIS platform Geo-Union, a digital campus of Peking university (PKU campus) is built. The architecture of PKU campus is based on Browser/Server mode, which consists of four layers: Browser, Web Server, Geo-Union Server and Spatial database server. The spatial information of PKU campus is organized as spatial entity, map layer and map and stored in Oracle8i.According the distribution of the campus, the spatial information consists of five parts: environment, main campus, Yan-bei campus, Chang-ping campus and medicine campus. The functions of PKU campus include information services both inside PKU and around PKU, such as map exploring, Web linking, site locating, spatial querying and navigating. The implementation method of PKU campus is based on WebGIS component and ASP. Two secondary developing components (GisView and PicView) are designed to integrate visualization, map operation, human-user interaction for map and image.PKU campus integrates all-sided service information in PKU, which will provide a convenient information channel for all members of PKU and other users, and will be a new window for exhibiting the image of PKU.