空间曲线在数字高程模型上的垂直投影算法

Algorithms of line's vertical projection line on DEM

在三维数字地图成为当前进行规划和设计的热点和难点前提下,如何将平面上规划设计的结果转换到空间地表模型上,成为从二维信息平台转化到三维信息平台一个难点。文中提出了影响域求交法和线段加密投影法,两种求空间曲线在数字高程模型上的垂直投影线的算法,并对这两种算法的特点和性能进行了比较。

Under the trend of 3D digital map becoming the hotspot and difficulty of layout and design, how to transform the designed result on plane to digital elevation model is a difficult from 2D information platform to 3D information platform. This article described two algorithms of how to get the space line＇s vertical projection line on DEM： intersection of influence region and dense line projection, and compared the characteristics and performance between them.