高精度数字高程模型(DEM)是水土流失规律研究与流域地形空间分析中重要的空间数据。
High accuracy DEMs is an important data in study of soil erosion and terrain feature space analysis.
采用层次模型设计“数字流域”中的数据共享模型，并对其实现方法进行了详细的分析，力图为“数字流域”提供一种高效的数据共享途径。
Designs a model for data Shared in digital basin with layer model assays its achieved method and tries to provide a effectual way for data Shared in digital basin.
通过分析比较，得出DEM水平分辨率对提取的地形特征及水文特征的影响，为马莲河流域的数字地形分析提供了理论依据。
The effect of DEM horizontal accuracy toward character of terrain and hydrological have been concluded based on analyzing and comparing.
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