【作者】 操凤萍； 窦万峰； 董泉源；

【Author】 CAO Feng-ping1,2,DOU Wan-feng1,2,DONG Quan-yuan1,2(1 College of Mathematics and Computer Science,Nanjing Normal University,Nanjing 210097,China;2 Key Lab of Virtual Geographic Environment,Nanjing Normal University,Ministry of Education,Nanjing 210079,China)

【机构】 南京师范大学数学与计算机科学学院；

【摘要】 空间数据的特殊结构及GIS的长事务特点,传统的加锁和多版本并发控制策略不能很好的满足协同GIS中多用户协作感知的要求.文中提出基于四叉树索引的区域版本并发控制机制,其借助中间层可以在协同空间数据更新系统中起到良好的并发控制和协作感知作用.更多还原

【Abstract】 The special structure of spatial data and long-duration transaction at GIS,making the traditional concurrency control strategy of multi-version and lock do not satisfy with the collaboration awareness by multi-user in cooperative GIS.So,region version concurrency control strategy based on quadtree index has been suggested in this paper,it can contributes to good performance in concurrency control and collaboration awareness in cooperative spatial date update system through mid-layer.更多还原