西宁地区DEM的建立及几个地形因子的提取

DEM Establishment and Several Terrain Factor Extraction Xining Area

青海省西宁地区地形因子复杂,应用地理信息系统(GIS),建立数字高程模型(DEM)是提取地形因子的先进方法。本研究利用Arcview3.3软件,建立了西宁地区DEM,完成了对西宁地区坡度、坡向、高程差3个地形因子的提取分析,并对西宁地区地形进行了三维效果显示,这对于提高西宁城区规划管理水平,促进西宁地区管理的现代化进程,具有现实意义。

Due to the complex topography of Xining area in Qinghai Province, using Geographic Information System （GIS） to build Digital Elevation Model （DEM） is the advanced method to draw topography. In this research, we have used Arcview3.3 software, built Xining area DEM, finished drawing analysis on three topography factor; slope,aspect and height measurement, made three-dimensional effect display on Xining area. All these will have practical significance to raise planning management level and promote modernized progress of Xining area.