互联网 qkzz.net
全刊杂志网:首页 > 女性 > 文章正文
刊社推荐

基于分布式拓扑的P2P矢量地理数据表示模型的研究


  摘 要:目前对矢量数据分布式拓扑关系的研究较少,且矢量拓扑表示方法不利于P2P矢量数据的共享和传输。提出一种基于分布式拓扑的P2P矢量地理数据表示模型。该模型结合矢量分片合并的思想,通过扩展WKT(wellknown text)格式来维持矢量数据的拓扑关系。进一步,对该模型的性能进行了数学分析,并基于JTS(Java topology suite)实现了相应的原型系统。理论分析和实验测试结果表明,该模型在选择适当的分片粒度情况下,能使数据传输比率最小化,从而验证了该模型提高数据传输效率和加快矢量数据分片、合并的有效性。

  关键词:对等计算技术; 矢量地理数据; 拓扑; 分片; 表示模型

  中图分类号:TP393文献标志码:A

  文章编号:1001-3695(2010)06-2170-03

  doi:10.3969/j.issn.1001-3695.2010.06.050

  Study of distributed topology based representation model of

  P2P vector geography data

  WU Jiagao1, HUANG Lin1, ZOU Zhiqiang1, FENG Jiali2, HU Bin3

  (1.Institute of Computer Technology, College of Computer, Nanjing University of Posts & Telecommunications, Nanjing 210003, China; 

  2. School of Geographic & Oceanographic Sciences, Nanjing University, Nanjing 210093, China; 3. Ministry of Education Key Laboratory of Virtual Geographic Environment, Nanjing Normal University, Nanjing 210046, China)

  Abstract:Recently, studies of distributed topologic relationship of vector data are few, and vector topological representation is not propitious to sharing and transmission of P2P vector data. This paper proposed a distributed topology based representation model of P2P vector geography data. Combined the model with vector division and union ideas, which extended WKT (wellknown text) format to maintain the topological relationship of vector data. In addition, analyzed performance of the model by mathematical method, and implemented a prototype system of the model based on the JTS (Java topology suite).The theoretical analysis and experimental test results show that the model can minimize ratio of data transmission with appropriate size of tile. Hence, the validity of the model, which can improve the efficiency data transmission and increase the speed of data division and union, is approved.

......
很抱歉,暂无全文,若需要阅读全文或喜欢本刊物请联系《计算机应用研究》杂志社购买。
欢迎作者提供全文,请点击编辑
分享:
 

了解更多资讯,请关注“木兰百花园”
分享:
 
精彩图文


关键字
支持中国杂志产业发展,请购买、订阅纸质杂志,欢迎杂志社提供过刊、样刊及电子版。
关于我们 | 网站声明 | 刊社管理 | 网站地图 | 联系方式 | 中图分类法 | RSS 2.0订阅 | IP查询
全刊杂志赏析网 2017