GIS是现代地理科学与空间信息科学相结合的产物，是现代地学领域十分重要的一门分析和应用工具。
GIS is an important analysis and application tool in earth science, which is based on contemporary geography and spatial information science.
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。
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.
本研究运用地学信息图谱的理论与方法，对我国黄土高原地区地面坡谱与其空间分异特征进行深入的研究。
The slope spectrum of the Loess Plateau and its spatial distribution are explored deeply by the theory and methodology of the Geo-information Tupu in this dissertation.
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