摘要
网络地理信息系统（ＷｅｂＧＩＳ）是近年来地理信息系统发展的方向之一。文中在分析网络地理信息系统内涵和功能的基础上，认为地理数据的空间可视化和空间分析是网络地理信息系统的重要特点。为此提出基于元数据的网络地理信息系统代理服务器的概念，并探讨了在ＪＡＶＡ平台上实现的一些技术问题。最后以京九沿线投资环境网络评估信息系统原型为例，给出了网络地理信息系统一个具体应用实例，实现了网络环境下地理模型分析功能。
WebGIS is a key direction of GIS development in recent years, yet there is no explicit definition of WebGIS. After some reviews of the development process of Geographical Information sharing through Internet and the development process of traditional GIS, this paper presents a view that geographical data (especially vector format data) visualization and spatial analysis function are the vital character of WebGIS. Common Internet browser is suit for information retrieve by text keywords and Image data display, yet it is not suit for geographical information organization, retrieve and analysis. Based on the Internet's Browser/Server architecture, this article puts forward an idea of WebGIS agent server based on the GIS metadata and its management system. WebGIS agent server provides temporal spatial attribute data analysis and fusion function, and it is more powerful and convenient for geographical Information application purpose. WebGIS includes WebGIS data server, WebGIS agent server and WebGIS Browser. We use java programming language and relational database as the platform to realize this architecture. First we convert all the spatial and non spatial information into relational database, using ODBC to manage those data. JAVA and ODBC are connected through ODBC/JDBC bridge. WebGIS browser builds topological relationship and geographical object in real time by spatial index when they visit WebGIS data server. Finally, we establish a prototype model of Jing Jiu Railway Corrida Region Investment Environment Information System based on the analysis of the connotation, function, architecture and technical solution of WebGIS discussed above. It's a concrete example of WebGIS. Though it is simple and incomplete, it provides the base for further discussion.
出处
《地理研究》
CSSCI
CSCD
北大核心
1998年第2期185-192,共8页
Geographical Research
基金
香港政府大学资助委员会资助
关键词
因特网
网络地理信息
GIS
功能
Internet, WebGIS, Jing Jiu Railway Corrida Region Investment Information System
