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。
A geo-spatial entity which can be organized from geometric data, symbol data, entity data, attribute data is regarded as an object to the object oriented geographical information model.
面向对象的地理信息模型以地理空间实体为对象，地理实体可以从几何数据、符号数据、实体数据、属性数据的角度来进行数据的组织。
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