等高线自动内插关键算法  

Research on key algorithm of automatic contour interpolation

作　　者：胡耀锋[1] 林鸿[1] 张鹏程[1] 

机构地区：[1]广州市城市规划勘测设计研究院,广州510060

出　　处：《测绘科学》2016年第8期24-27,62,共5页Science of Surveying and Mapping

摘　　要：针对现有规则网格法、三角网法、最大角优先原则法、最近距离法等等高线内插算法的局限性,该文结合数字线划图中离散高程点和高程注记的图式表达特点,提出了距离优先算法和综合匹配法;结合等高线节点分布特征,提出了按节点提取算法和按距离提取算法。通过这些算法的组合应用,解决了等高线自动内插的技术难题,并以此算法为基础开发出了一套成熟的软件,通过广州增城地区1 616km^2地形图编绘和日常工作实践,验证了该算法的适应性和先进性。In order to overcome the limitations of grid method,triangle network and traditional shortest distance algorithms,a combination method of distance first algorithm and integrated matching was improved based on the characteristics of scattered elevation points and annotation symbol in digital line graph.According to the distribution of contour notes,this paper put forward a distraction method based on nodes and distance.The combined application of these algorithms solved the automatic Interpolate difficulties.A ripe software was developed based on the algorithms and was successfully used in 1616 square kilometers digital map drawing in Zengcheng district,Guangzhou.Therefore,the combination method was highly automatic,intelligent,and had high adaptability.

关 键 词：等高线 内插 高程 地形图 

分 类 号：P208[天文地球—地图制图学与地理信息工程]