在此基础上，给出了三维数字地形交互显示的两种主要方式及实现方法。
Moreover, we also discussed the main two methods of drawing and displaying of it.
采用1：25万地形数据与RS分类图配合形成三维立体森林景观。
This study adopts 1:250 thousand scale image and RS classification map to set up forest landscape.
采用1：25万地形数据与RS分类图配合形成三维立体森林景观。
This study adopts 1:250 thousand scale image and RS classification map to set up forest landscape.
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