【摘要】 通过分析geodatabase空间信息存储与管理方面的优点,提出了geodatabase建模方法以及它们各自的适用情况。根据CASE工具允许用户创建用来扩展ArcInfo8的数据模型的定制要素的功能,应用规范的面向对象分析和设计的方法与理论,采用UML建模语言建立设计方案,在模型的基础上,通过创建COM类来执行定制要素的行为并创建保存定制要素属性的地理数据库的方法。更多还原

【Abstract】 Through analyzing the advantages of the geodatabase with spatial information storage and management, the paper puts forward three kinds of modeling methods and their own suitable situations for geodatabase. Also according to the function of the CASE tools which allow users to create custom elements used to extend the data model of ArcInfo 8, it discusses the modeling method by using CASE tools. With standard object-oriented analysis and design plan and theory, this method has set up the designing schema by UML modeling language. On the basis of the model, it has carried out the behavior of custom elements and created the geodatabase to save the attributes of custom elements.更多还原