元数据驱动的多中心空间数据同步方法研究  

Research on Metadata- driven Synchronization Method of Multi- center Spatial Data

作　　者：徐道柱[1,2,3] 金澄[1,2,3] 安晓亚[2,3] Xu Daozhu Jin Cneng An Xiaoya(Institute of Geospatial Information, Information Engineering University, Zhengzhou 450052 Xi＇an Research Institute of Surveying and Mapping, Xi＇an 710054 , China State Key Laboratory of Geo - information Engineering , Xi＇an 710054 , China)

机构地区：[1]信息工程大学地理空间信息学院,河南郑州450052 [2]西安测绘研究所,陕西西安710054 [3]地理信息工程国家重点实验室,陕西西安710054

出　　处：《测绘科学与工程》2016年第4期66-71,共6页Geomatics Science and Engineering

摘　　要：针对分布式空间数据库多中心数据同步问题，提出了基于元数据驱动的方法。通过设计层次元数据模型。对元数据进行分布式管理，实现元数据与空间实体数据联动更新，进而实现变化空间数据的捕获、传输和同步，采用变化数据并发提取、小文件打包传输和并发更新机制，提高了数据同步效率。实验结果表明，本文设计的方法能够实现矢量、栅格和专题等类型数据的高效同步更新。A metadata - driven method is proposed to solve the multi - center data synchronization prohlem of distributed spatial database. The linkage - update of metadata and spatial entity data is realized by hierarchical metadata model designing and distributed management of metadata. The capture, transmission, and synchronization of changing spatial data is implemented on the basis of metadata update, and the efficiency of data synehronization is improved by adopting the strategies of concurrent extraction of changing data, package transmission of small file and concurrent update mechanism. The experiment results show that the method will realize a highly efficient synchronization and update of vector, grid and thematic data and so on.

关 键 词：元数据模型 元数据驱动 数据同步 并发更新 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]