基于Web Service的空间数据共享平台

分析传统GIS软件存在的数据共享、集成困难和应用间互操作复杂的问题，提出了基于Web Service的数据共享平台的简单原型和实现技术。阐述如何基于开放的规范和协议构建开放的数据存储一体化模型，并在此基础上，提出了分布式环境下基于Web Service数据节点集群、互操作方案，以及上层充一的应用开发模式，包括提供以面向对象的思想定义的、构建上层应用的组件支持。重点研究了在空间数据文本化之后数据的索引、查询问题，提出了结合元数据和GML的两阶段数据查询方案。并对该平台下空间数据的语义共享方式做初步探讨。

Spatial Data Sharing and Integration Platform Based on Web Service

In this paper, a new spatial data sharing and integration platform, which bases on Web Service, is introduced. There are many problems in spatial-data sharing and integration under the traditional architecture of the spatial application framework, which limits GIS development to a new level. To overcome the problems, the authors present a way to share and operate spatial data between systems, including structures, new storage model based on open and well-defined specifications and protocols, and a mechanism of data-center inter-operation which bases on Web Service. This architecture will help to develop the service-oriented applications. The paper focuses on query of data in text mode. To make it efficient, a two-step query protocol based on metadata and GML is defined. And it also defined how to get the data slice, in local and remote, etc.