摘要
在进行数字化地形测量或纸质地形图矢量化成图时,利用南方CASS的等高线内插功能绘制的等高线存在震荡波、内插失效等问题,这往往需要大量的人工修改才能满足出图要求。针对此问题,文章提出了步长滤波优化方法。实践证明,该方法能有效解决等高线内插不合理问题,且能大大减少等高线手工编辑的工作量,提高工作效率。
Using the contour interpolation function in SOUTH CASS software to draw contour, there are some problemssuch as shock wave, interpolation failure and so on when carried out digital topographic survey or vectorization ofexisting papery maps, which often need to make a lot of artificial modification to meet the requirements of specification oftopographic mapping. To solve these problems, the optimization method of step filtering was presented in this paper.Practice has proved that this method can effectively solve the problems of contour interpolation, and also can greatly reducethe workload of manual editing contour and improve work efficiency.
出处
《地矿测绘》
2016年第2期35-38,共4页
Surveying and Mapping of Geology and Mineral Resources
关键词
地形图矢量化
等高线内插
存在问题
步长滤波
LISP语言
vectorization of topographic map
contour interpolation
existing problems
step filtering
LISP language
