The models solve the problems of computer compressing store and analysis and processing for map elements, with relationship and coexistence of geo graphics database and geo attribute data files.

该模型以地学图形数据库与属形数据文件关联共存的方式，解决了地图要素的计算机压缩存贮与分析处理问题。

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As the data base of the GIS digital terrain analysis, digital Elevation Model (DEM) contains rich of terrain, topography and related geo-information and knowledge.

数字地形模型(DEM)包含着丰富的地形、地貌及相关的地学信息与知识，是GIS数字地形分析的数据基础。

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Because of powerful data tackling ability and spatial analysis function, Geographic Information System (GIS) provides a new study method for regional geo-environment research.

地理信息系统(GIS)因其具有强大的数据处理功能和空间分析功能，为区域地质环境研究提供了新的研究方法。

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