基于ASTER GDEM的黑龙江省地形起伏度分析

Analysis of Relief Amplitude in Heilongjiang Province Based on ASTER GDEM

地形起伏度是描述地貌形态的重要指标,反映了研究区域内地势起伏特征。以黑龙江省为研究区域、以30 m分辨率的ASTER GDEM(先进星载热发射和反射辐射仪全球数字高程模型)数据为基础,在ArcGIS平台上利用领域分析法分析不同窗口大小下的地形起伏度,通过均值变点法得出最佳统计单元面积为0.396 9 km^(2)。在此基础上对黑龙江省地势起伏度进行分析。结果表明黑龙江省地形起伏可分为4类,主要以台地、丘陵为主,平原占比次之。

The relief amplitude is an important index to describe the Geomorphological form,which reflects the relief characteristics in the study area.Taking Heilongjiang Province as the research area,based on the ASTER GDEM(advanced spaceborne thermal emission and reflection radiometer global digital elevation model)data with 30 m resolution,with the support of ArcGIS platform,the relief amplitude was extracted with the neighborhood analysis method at different neighborhood windows.The best statistical unit area is 0.3969 km^(2) through the mean change point method.On this basis,the features of relief amplitude were analyzed.The results show that the relief amplitude in Heilongjiang Province can be divided into 4 categories,mainly platform and hills,followed by plain.