中文摘要：

为了控制和加强原始地理数据的应用质量,Geodatabase数据模型在引入地理要素的关系、行为和规则的同时定义了一系列约束机制对数据的属性域、关系以及拓扑几何关系方面进行约束,无需编码便可减少原始数据在输入、变更等过程中的错误。文章研究Geodatabase模型中的数据质量约束机制,并以道路网数据库的建立为例说明其在数据质量约束中的应用。

英文摘要：

In order to control and enhance the application quality of the original geographic data,Geodatabase data model defines a series of constraint mechanism on the properties of the data fields,relationships,and topological geometrical relationship while introducing the relationship,behavior and the rules of geographic elements,which can reduce the errors generated in the process of inputting and changing the original data without program coding.This paper researched the quality constraint mechanism existed in the model and showed its application in the establishment of a road network database.