digital terrain file 中文意思是什麼
digital terrain file
解釋
數字地形文件-
A digital elevation model ( dem ) is a digital file consisting of terrain elevations for ground positions at regularly spaced horizontal intervals. dem may be used in the generation of three - dimensional graphics displaying terrain slope, aspect ( direction of slope ), and terrain profiles between selected points
數字高程模型( dem )是反映高程信息的數字地面模型,它是以數字的形式按一定的結構組織在一起、表示實際地形高低起伏和地形大小特徵的空間分佈模型。
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