面向对象的基于实体关系的时空数据模型

An Object-oriented Spatial-temporal Data Model Based on Entity-relation

从解决时空数据模型的三个关键问题,数据的冗余、更新,时空一体化以及时空分析入手,建立具有面向对象的特性的实体类、关系类、时间类。每个类封装自身的特性、操作等内容。利用类之间的相互引用机制实现对象之间的相互引用和互操作机制。

Through solving the three key problems of spatial-temporal data model including data redundancy and update, spatial-temporal integration and spatial-temporal analysis, this paper presents a new method of generating an object-oriented spatial-temporal data model by establishing three classes, i. e. , Entity, Relation and Time. Each class has its own features and operation, and carries out mutual quotation between.