摘要： 提出了实现空间地理信息(SGI)远程分发的网格分发系统(GIGD)。以图的方式定义了网格资源节点，建立了SGI资源和网格资源的关系，给出了GIGD的形式化表示，构建了面向服务的6级分层网格模型，基于开放OGSA服务与接口定义模式设计了系列网格服务，实现了支持请求/应答服务模式、SGI无中心式网格分发的GIGD。资源查找过程中GridService和直接拷贝的性能比较表明：GridService的传输效率与直接拷贝模式相当，达到最大传输速率更快，对数据量的依赖性不强。
关键词:
网格,
空间地理信息,
数据分发,
网格模型
Abstract: Geographic information grid dissemination system(GIGD) for disseminating spatial geographic information(SGI) to remote user is presented. Grid resource nodes, presented according to the graph theory, are defined. The relationships among SGI, grid resources and GIGD formal presentation are established. Six grades grid hiberarchy oriented to services and a series of user-defined grid services based on OGSA services and interfaces patterns are designed. GIGD flow without grid center is implemented to support request/response model. The performances of grid services and copy mode in the process of resources location are tested. The results show that Grid Services can achieve SGI dissemination effectively as copy mode, faster in maxiam transferring speed while less dependent on data flow.
Key words:
Grid,
Spatial geographic information,
Data dissemination,
Grid model
中图分类号:
张 东;王家耀;朱闻渊;李 英.
空间地理信息分发的网格模型与服务研究
[J]. 计算机工程, 2007, 33(11): 59-61.
ZHANG Dong; WANG Jiayao; ZHU Wenyuan; LI Ying. Research on Grid Model and Services for Spatial Geographic Information Dissemination[J]. Computer Engineering, 2007, 33(11): 59-61.