GIS中矢量时空数据组织策略

Organization strategies of vector spatio-temporal data in GIS

时态GIS作为GIS理论和技术研究前沿领域的一个难点问题越来越被重视。从实用角度出发,提出矢量时空数据组织策略,包括:时间精确到秒,用数字表示;离散变化用状态和事件来共同描述,而连续变化用事件来描述;现状/历史数据分离,空间/属性数据分离;时间标记在元组级上,空间数据采用非拓扑数据模型。在此基础上,将矢量时态层划分12种类型,详细设计其关系表组成和具体表结构。最后,设计和开发相应的实验系统,并以图斑数据和车辆轨迹数据为例验证相关策略的可行性。

As a difficult problem in theory and technique of GIS,temporal GIS gets more and more attention.Aiming at the vector spatio-temporal data,some organization strategies are brought forward from practical viewpoint.Firstly,the precision of time is second,and time is represented with the number.Secondly,the discrete change is described with state and event,and the continuous change is described with event.Thirdly,the reality data and history data are separated,and the spatial data and attributive data are separ...