中文摘要：

P2PG IS是对等计算技术与地理信息系统（G IS）结合的产物。面向P2P的栅格地理数据共享已得到广泛应用,但矢量地理数据与P2P的结合仍然面临诸多难题。本文深入研究了面向P2P的分布式矢量数据索引机制,提出了基于L ink ing机制的矢量地理数据组织模式、分割及无损拓扑重建算法。实验表明本文提出的分布式矢量数据组织方式和无损重建算法在P2P网络中,能够满足用户快速获取矢量数据的需求。

英文摘要：

P2PGIS is the combination of P2P and modern Geographical Information System（GIS）.P2P oriented raster geo-data sharing has been widely applied;whereas the combination of vector geo-data and P2P still has many issues that can＇t be handled.Index mechanism of P2P-oriented distributed vector data was researched deeply in this paper,and the pattern of vector geo-data organization based on Linking Mechanism,segmentation and lossless reconstruction were proposed in this research.Experiments showed that the organization and the lossless reconstruction algorithm could satisfy customer＇s demand of quickly access to vector data.