空间数据发布的设计与实现

The Design and Realization of Spatial Data Dissemination

本文从WebGIS系统设计的角度出发，针对现在空间数据发布与共享存在的问题设计了一套空间数据发布与提取系统。该系统是基于ArcIMS平台，采用浏览器／服务器模式，利用ASP＋ADO技术、JavaScript及ArcXML，实现了元数据检索、用户权限管理、地图发布向导、地图显示、地图操作、图元查询、地网要素提取、地图空间数据索引、图例／图层管理等九个主要功能模块。文章论述了该系统的建立过程和设计与实现的技术途径，并对其发展前景做出了展望。

In this paper,a dissemination and extraction system for spatial data is designed and realized,ai ming at sovling current problems of spatial data dissemination and sharing from the point of view of systematic design of WebGIS. By using the browser/server mode and technologies of ASP ＋ADO, Java Script and ArcXMI.,this system based on Arelme platform realizes the following functions,that is metadata searching, us er management, guide for map dissemination, map display, map operation, primary graphic element query, map feature extraction, map spatial data idex and legend/map layer management. Furthermore, the technological strategy for system design and realization is also discussed. Finally, the future development protential of the system is predicted.