一种基于地理实体的时空数据模型设计

Spatio-temporal Data Model Design Based on Geographical Entity

分析了传统基于图元的地理数据模型的不足,设计了一种面向地理实体的时空数据模型。从空间、属性、关联关系等方面对地理实体构成进行了分析,比较了其与传统地形图在数据组织形式上的差异,从理论上研究了该数据模型下地理实体在关系数据库中的组织与存储方法,重点阐述了地理实体间关联关系的表达与存储,介绍了地理实体入库的一般流程,为今后新型基础测绘体系按地理实体分级的非尺度基础时空数据库建设提供了借鉴。

In this paper,we analyzed the shortcomings of traditional geographical data model based on graph element,and designed a spatio-tem-poral data model oriented to geographical entities.We analyzed the composition of geographical entities from the aspects of space,attribute and correlation,compared it with traditional topographic map in the differences in the form of the data organization,theoretically studied the organiza-tion and storage methods of geographical entities in relational database under this data model,expounded the expression and storage of the rela-tionship between geographical entities,and introduced the geographical entity database general process,which could provide a reference for the construction of non-scale basic spatio-temporal database of new basic surveying and mapping system according to geographical entity classifica-tion in the future.