基于中间件的分布式WebGIS架构的研究

Middleware-based Distributed Architecture of WebGIS

WebGIS作为Internet影响巨大的Web服务应用,如何与分布式技术相结合,实现分布式网络地理信息系统的架构。文中在WebGIS的基础上分析实现分布式WebGIS的五类构造方法,讨论CGI、ServerAPI、Plug_in、JavaApplet、ActiveX的实现功能以及优缺点。随后展开对分布式WebGIS中间件技术架构的分析,对基于DCOM和基于J2EE的两大技术进行结构分层研究。对分布式WebGIS的应用性能的提高起到重要的作用。

WebGIS has huge impact on Internet as an application of Web Service. This paper tells of how to make a combination of distributed technology and WebGIS to realize the distributed architecture of WebGIS. This paper based on WebGIS, analyzes the five categories of Distributed WebGIS Construction, discusses the implementations of CGI, ServerAPI, Plug_in, JavaApplet, ActiveX and their advantages and disadvantages of the achievement. And this paper also describes the middleware technology structure of the Distributed WebGIS, and tbe research on tiered structure of the DCOM-based and J2EE-based technologies, which plays an important role in the improvement of distributed WebGIS application performance.