The core of the 3d reconstruction of the city landscape modeling, including the landform modeling and geographical object modeling.
而城市三维景观重建的核心内容是景观模型的建立，其中包括地貌模型、地物模型的建立。
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。
The image and object of geographical draft is an important tool in geography - learning, and correct usage to geography is also an important geographical skill.
地理图表形象、直观是学习地理的重要工具，对地图的正确使用是重要的地理技能。
The image and object of geographical draft is an important tool in geography - learning, and correct usage to geography is also an important geographical skill.
地理图表形象、直观是学习地理的重要工具，对地图的正确使用是重要的地理技能。
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