Compared with several other data models used in early and recent GIS, the author gives his own idea of what is a geographical space, and then puts forward a new object-oriented conceptual data model.

本文在分析和总结了早期和近期GIS几种数据模型的优缺点的基础上，对地理空间进行了重新理解，给出了一个面向对象的概念数据模型。

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There are high level type systems and soundness in the new computing model, making it extremely expressive and robust, which is seldom possible in prevailing object-oriented programming.

这套计算模型中引入了一些高层次的类型系统和安全机制，使它的表达能力和安全性超越了流行的基于面向对象的计算模型。

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The new model can be represented simply and efficiently in computer software by an object oriented method.

这一信息模型可方便地采用面向对象的方法在计算机中描述与表达。

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