高质量数字高程模型的建立是DEM应用的重要前提。
High quality DEM construction is the important precondition of the application.
首先介绍了数字高程模型的基本知识，及其在水文中应用。
At first, the basic knowledge of DEM and its application in the hydrology were introduced.
首先介绍了数字高程模型的基本知识，及其在水文中应用。
At first, the basic knowledge of DEM and its application in the hydrology were introduced.
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