【摘要】 数字高程模型(DEM)是DTM的一种特例,是对地球表面地形地貌的一种离散的数字表达。DEM是地理信息系统进行地形分析的基础数据。采用1:10万数字等高线数据建构30m空间分辨率格网DEM,并基于DEM进行分级,提取坡度、地形起伏度及坡度聚类,坡谱等地形分析;比较准确地表达了福建的总体地形特征,为地理分析及环境评价等提供了基础的数据。更多还原

【Abstract】 The digital elevation Models(DEM) is a common method used in three dimension surface modeling.And it is also an effective tool for terrain analysis.A rectangular DEM of Fujian province is constructed using the digital contour map of 1∶10000 scale.And then several indices of describing the topographic features such as slope and relief amplitude was derived from the DEM.The terrain feature of Fujian province is analyzed employing the methods include slope clustering and statistics in the end.更多还原