基于历史关系数据库的时空数据库实现研究  

Research on Realizing Spatial-temporal Database Based on Historical Relational Database

作　　者：黄勇奇[1,2] 崔伟宏[1] 

机构地区：[1]中国科学院,遥感应用研究所,北京100101 [2]中国科学院,研究生院

出　　处：《遥感学报》2008年第5期759-764,共6页NATIONAL REMOTE SENSING BULLETIN

摘　　要：时空数据库是研究如何存储历史和当前的时空数据,从而跟踪分析某一区域的变化,最终实现时空模型化和模拟地学过程。采用历史关系数据库模式的时空数据库可以充分利用传统时态数据库时态查询功能和GIS空间分析处理功能这些方面成熟的研究成果和现有系统,降低时空数据库建立的费用和开销。分析了采用扩展关系型时空数据库的原因,介绍了历史关系数据库模式、时态关系代数和查询语言,研究了采用历史关系数据库模式在全关系化空间数据库中组织时态信息的方法,从而实现时空数据库。以麦地轮作为例说明了采用历史关系数据库模式建立时空数据库的可行性和有效性。Spatial-temporal database researches on how to store historical and current spatial-temporal data so as to track and analyze changes of some region,which finally implements spatial-temporal modeling and geographical simulation process.At present there are mainly two solutions as for spatio-temporal database.The one is adding time dimension on the basis of spatial database.The other is extending spatial dimension on the basis of temporal database.The research on spatial database has already been mature at the present time.So we should fully make use of existing spatial data model and spatial processing and analyzing functions of GIS,which will reduce enormously workload.Consequently this paper chooses to add time dimension on the basis of spatial database.Extended relational spatio-temporal database extends time dimension by considering time as attribute of spatial geometry and thematic feature,which has its particular advantages.For one thing,relational database is supported by strict relational algebra and has many available large commercial relational databases.In addition,many information systems are originally established on the basis of relational database.In the second place many researches on temporal database itself mostly adopt relational model,which extend temporal semantics for relational algebra and develop temporal structured query language.Thirdly many researches on spatial database in GIS domain also employ relational data model,and research on spatial query language is also based on relational model.All in all,spatial-temporal database adopting model of historical relational database can make the best of research results and existing systems such as temporal query function of temporal relational database and spatial process and analysis function of GIS,reducing the cost of establishing spatial-temporal database.This paper at first introduces historical relational database model,temporal relational algebra and temporal query language,and then conducts researches on historical relational database to

关 键 词：时空数据库 全关系化空间数据库 历史关系数据库 轮作 

分 类 号：P208[天文地球—地图制图学与地理信息工程]