CASS2008软件防止非建模点建模的方法

Method for Preventing the Non Modeling Points Modeling Using CASS2008

在利用绘图软件绘制等高线时,有一些高程点不能参与DTM三角网建模,否则会导致等高线失真。巧妙地利用CASS2008绘图软件,进行修改DTM三角网、修改数据文件、去掉非建模点的高程属性等操作,把不能参与建模的高程点转变为非建模点,就可解决等高线失真的问题,大大提高地形图绘图的效率。

In the drawing of contour line by drawing software,there are some elevation points can't participate in the DTM triangulation network modeling;otherwise,they will lead to the contour distortion.This paper used CASS2008 drawing software cleverly to modify the DTM triangulation network and data files,and remove the elevation attribute of non modeling points.Thus,the paper put some elevation points,which should not join modeling,into the non modeling points.This method can solve the problem of contour lines distortion,and improve the efficiency of topographic map drawing greatly.