基于Web服务的分布式空间数据共享模型

基于流行的Web服务技术,对分布式空间数据共享进行了研究,提出了空间数据服务、空间数据转换、服务请求代理和空间数据目录4个核心概念,组成了一个面向Internet分布式空间数据管理和发布体系.该模型以现有的主流GIS软件为基础数据源,利用Web服务技术,按照OGC的空间数据规范和服务规范进行再封装,形成统一的空间数据服务和转换服务,同时不影响当前GIS软件的数据访问和客户端应用,在软件体系的开放性、先进性以及实施成本之间求得了平衡.

Distributed Spatial-data Share Service Model with Web Services

On the basis of analyzing solutions on spatial-data access and storage of main GIS software, the paper presents the design of a distributed spatial-data share service model with robust XML Web service. In the model, there are four basic units, spatial-data service, data transform service, data access agent and spatial-data catalog service, which compose a flexible and distributed spatial-data managing and sharing architecture. It is important to reuse the software and data on the running system, the paper focuses how to use Web service wrap the existing data engine and database.