Abstract: The architecture, technologies and implementation of the Shanghai city spatial information system for application and service, a SIG (Spatial Information Grid) based platform was introduced. In the system, there were ten categories of spatial information resources, including city planning, landuse, real estate, river system, transportation, municipal facility construction, environmental protection, sanitation, urban afforestation and basic geographic information data. In addition, spatial information processing services were offered as means of GIS Web Services. The resources and services were all distributed in different Webbased nodes. A single database was created to store the metadata of all the spatial information. A portal site was published as the main user interface of the system. There are three main functions in the portal site. First, users can search the metadata and acquire the distributed data by using the searching results. Second, some spatial processing Web applications developed with GIS Web Services, such as file format conversion, spatial coordinate transfer, cartographic generalization and spatial analysis are offered. Third, GIS Web Services currently available in the system can be searched and new ones can be registered. The system has been working efficiently in Shanghai government network since 2005.

Key words: Spatial Information Grid (SIG), Spatial Information, Service, Shanghai

摘要： 基于空间信息网格SIG框架的上海城市空间信息应用服务系统中城市空间特征、绿化、环保、水系、土地、道路网络等各类城市空间信息资源分布在网络的不同节点上；建立了集中的元数据库提供相关数据的描述信息；以分布在不同节点上的GIS Web Service提供空间数据处理服务。平台以门户网站的方式提供元数据检索，利用检索结果获取分布式的各类空间信息数据资源；提供空间数据处理网络应用程序，调用GIS Web Service，提供格式转换、坐标转换、地图综合、空间分析等空间数据处理功能；提供GIS Web Service的搜索和注册。此平台已经在上海公务网中实际运行。

关键词: 空间信息栅格, 空间信息, 服务, 上海