基于DEM的地势起伏度研究

Relief Amplitude Study Based on Digital Elevation Model

本文在GIS软件的支持下,利用窗口分析、均值变点法等分析方法,以吉林省长春市中心城区为研究区,进行了研究区地势起伏度的研究,最后得出了研究区地势起伏度计算的最佳统计单元为36×36(3.24 km2),完成了研究区地势起伏度图的绘制,分析了该研究区域的地貌特征,并拟合得到了研究区地势起伏度曲线.结果表明,长春市中心城区内整体地势比较平坦,最大地势起伏度为0.407,局部地势起伏度变化缓慢.

In this paper, the relief amplitude of Changchun city, Jilin province is studied by the use of window analy- sis method, the mean of change - point analysis based on GIS system. It is concluded that the optimum statistical u- nit of the relief amplitude in the study area is 36 x 36 （ 3.24km2） . Also, the relief amplitude map and the relief am- plitude curve fitting are achieved by analyzing the geomorphological features of the study area. The results show that the whole terrain of the study area is relatively flat and with the slowly local changes, the maximum of the relief am- plitude is 0. 407.