网格数据模型的行政区划演变展现方法

A method of demonstrating the evolution of administrative division based on grid data model

针对传统矢量数据模型在表达历史行政区划时空变化过程中存在数据结构复杂、处理算法难度大的问题,该文在中国历史地理信息系统(CHGIS)提出的"生存期"概念的基础之上,采用网格数据模型存储行政区划数据,将具有三维特征的时空数据存储于二维关系表中,建立包含全部时间序列和空间数据的行政区划时空数据库,并利用SQL语言查询行政区划数据的时空信息特征。结果表明,这种以形状相同、大小一致的网格单元作为行政区划数据载体的方法,结构简单清晰,操作便捷,利于查询显示和统计分析特定空间位置处历史行政区划演变的活跃程度及演变的规律特征。

In order to solve the problems of complex data structure and difficult processing algorithm during the process of expressing historical administrative divisions in the spatio-temporal change of multi-chip vector data model,the concept of"lifetime"proposed by the Chinese historical geographic information system(CHGIS)was used in this paper.The grid data structure was used to store administrative division data,the spatio-temporal data with three-dimensional features was arranged into a two-dimensional relation table for storage,and an administrative divisional space-time database including time-series and spatial data was established.And the spatio-temporal information characteristics of administrative division data were searched using the SQL language.The results showed that the grid unit with the same shape and the same size was used as the data carrier of the administrative division;the structure was simple and clear,and the operation was simple.It is convenient for query display and statistical analysis the regular characteristics of the active degree and evolution of the historical administrative division at a specific spatial location.