基于不同DEM分辨率下的黄冈市数字地形分析

摘要

为了解湖北省黄冈市地形地貌特征,以黄冈市空间分辨率为30 m×30 m的DEM为基础数据源,在ArcGIS10.1中,利用空间分析模块下的重采样工具,将30 m的数据采样成60 m、90 m、120 m的DEM数据.分析了4种分辨率下研究区域坡度、粗糙度、沟壑密度以及水文特征,以期为该区域水土流失治理工作提供科学指导.%Based on DEM with the spatial resolution of 30 × 30 meters, this paper studied the topographic characteristics of Huanggang city in Hubei Province.In the ArcGIS10.1, 30 meters of data were sampled into 60 meters, 90 meters and 120 meters of DEM data using the resampling tool under the spatial analysis module.The slope, roughness, gully density and hydrological characteristics of the study area were analyzed under 4 different resolutions in order to provide scientific guidance for the control of water and soil loss in this region.