基于南方CASS的等高线内插功能的改进.pdfVIP

• 35 • 地矿测绘 2016,32(2) :35 ~38 CN 53 -1124/TD ISSN 1007 -9394 Surveying and Mapping of Geology and Mineral Resources 基于南方 CASS的等高线内插功能的改进+ 韦相任 (广 东有色金属地质局九三三队 ，广东 肇 庆 526060) 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。 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 中图分类号： P 208; TP 391.4 文献标识码 ： B 文章编号：1007 -9394(2016)02 -0035 -04 Improvement of Contour Interpolation Function Based on SOUTH CASS WEI Xiang-ren (933 Team of Geology Bureau for Nonferrous Metals of Guangdong Province, Zhaoqing Guangdong 526060 , China) Abstract ：Using the contour interpolation function in SOUTH CASS software to draw contour, there are some prob­ lems such as shock wave, interpolation failure and so on when carried out digital topographic survey or vectorization of existing papery maps, which often need to make a lot of artificial modification to meet the requirements of specification of topographic 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 re­ duce the workload of manual editing contour and improve work efficiency. Key words vectorization ： of topographic map ； contour interpolation ； existing problems ； step filtering ；LISP language 荡，严重失真，如图1 所示。这种情况还需手动修改，由于曲线 〇 引言