DEM数据处理与分析目录一、DEM数据获取.........................................................................................1二、DEM数据处理.........................................................................................3（一）初步预处理.....................................................................................3（二）其他处理........................................................................................8（三）坐标转换（计算坡度之前的预处理）................................................10三、DEM数据拼接.......................................................................................12（一）获取............................................................................................12（二）镶嵌............................................................................................12（三）裁剪............................................................................................14四、地形属性提取.........................................................................................15（一）坡度提取......................................................................................15（二）坡向提取......................................................................................15（三）表面曲率提取................................................................................16五、透视图建立............................................................................................17（一）设置抬升高度................................................................................17（二）修改显示符号系统.........................................................................18（三）设置渲染......................................................................................19（四）其它图层（栅格或矢量）数据按地形高度进行抬升.............................20六、建立和显示TIN......................................................................................21（一）TIN转换......................................................................................21（二）TIN属性描述................................................................................21（三）TIN渲染......................................................................................22七、创建等高线............................................................................................23（一）创建等高线...................................................................................23（二）创建垂直剖面................................................................................24（三）坡度分级......................................................................................25七、DEM相关应用.......................................................................................25DEM应用之坡度：Slope........................................................................26DEM应用之坡向：Aspect......................................................................30DEM应用之提取等高线..........................................................................32DEM应用之计算地形表面的阴影图...........................................................34DEM应用之可视性分析..........................................................................38DEM应用之地形剖面..............................................................................41八、说...
