全国铁路地理信息系统应用服务共享平台的研究

Research on Application Service Sharing Platform for China Railway Geographic Information System

应用服务共享平台为一个三层服务体系结构,主要提供五种服务:数据提供、数据分析、数据表现、元数据以及应用集成服务。平台功能的设计主要依据表示逻辑与处理逻辑相分离、通用功能与专用功能相分离两个基本原则。平台的核心是一个包括基础服务层和应用构件层的二层体系结构。平台的关键技术是多层服务体系结构、分布式海量空间数据存取、智能空间分析与数据挖掘技术以及基于XML的元数据技术。

This paper puts forward a 3tier service architecture of the application service sharing platform for China railway geographic information system, which can provide 5 kinds of data services: access, analysis, visualization, metadata and application integrity. The design of the platform is based on 2 basic principles: separating the expression logic from processing logic and separating the general function from special function. The core of the platform is a 2layer architecture that include the basic service and application component. The key technologies for this sharing platform are the multitier service architecture,access of great capacity for distributed spatial data, intelligent spatial data analysis and mining and XMLbased metadata management etc. 