基于Internet和Intranet的多源分布式空间要素服务系统

A Multi-Source Distributed Spatial Feature Service System Based on the Internet and Intranet Application

本文介绍了一个兼顾Internet和Intranet用户应用的分布式空间要素服务系统,符合OpenGIS的WFS规范和GML规范,采用XML/SOAP/WebService技术,向Internet用户提供空间要素服务;通过J2EE平台,采用EJB组件技术向Intranet用户提供空间要素服务。本文还介绍了一个异构多数据源统一访问接口的设计与实现,而且分析了系统性能优化的一些措施,包括附件方式的WebService、地理信息数据的压缩、缓冲等技术,而且设计并实现了一个多数据源的数据库连接池。

According to the OpenGIS WFS and GML Implementation Specification, with the utilization of Web Service, SOAP technology,and EJB,this paper presents the design and implementation of a Multi-Source distributed spatial feature service system which can satisfy the requirements of the internet users and intranet users.A unified interface for multi-spatial databases access is described in this paper and the technology of improving the performance of this system is discussed such as SOAP with attachment,data compressing and cache,database pooling.