基于不同水平分辨率DEM的数字地形分析研究

Research on Digital Terrain Analysis Based on DEM with Different Horizontal Resolutions

以榆次地区为试验区,水平分辨率30 m×30 m的DEM为原始数据,用最邻近法插值出水平分辨率为50 m、70 m的规则格网,提取坡度、地形起伏度等地形因子及水文信息,并通过地形因子等要素研究地形分布规律。研究表明,不同水平分辨率的DEM对地形信息的概括有着不同影响。

This paper selected Yuci area as the experimental area,the DEM with a horizontal resolution of 30 m×30 m was used as the original data.The nearest neighbor method was used to interpolate a regular grid with a horizontal resolution of 50 m and 70 m,extract hydrological information and Terrain factors such as slope andrelief amplitude,study spatial pattern of terrain through Terrain factors.Studies show that DEM with different horizontal resolution has different influences on the generalization of terrain information.