几种曲面内插方法在建立数字高程模型中的比较  

Comparison of several surface interpolation methods in establishing digital elevation model

作　　者：闫肖飞 YAN Xiaofei(Shenzhen City Industrial Exploration and Geotechnical Group Co.,Ltd.,Shenzhen 518000,China)

机构地区：[1]深圳市工勘岩土集团有限公司,广东深圳518000

出　　处：《中国高新科技》2021年第16期154-156,共3页

摘　　要：目前建立数字高程模型的主要方法为采用离散点建立不规则三角网(TIN),在此基础上再进行标准格网点内插,不同的内插方法对模型的建立有不同的效果。一般来讲,内插幂次越高则模型越光滑,失真度越小,但幂次太高会增加计算机的运算资源,计算机编程也越复杂。文章在研究了TIN线性内插和其它几种内插方法的算法并编写计算机程序对内插结果进行比较,结果显示采用TIN5次内插无论其效果还是边界条件及计算机程序设计都是最合适的。At present,the main method of establishing digital elevation model is to use discrete points to establish Irregular Triangulation Network(TIN),and then carry out standard grid interpolation.Different interpolation methods have different effects on the establishment of the model.Generally speaking,the higher the interpolation power,the smoother the model and the smaller the distortion,but too high power will increase the computing resources of the computer,The more complex computer programming is.In this paper,the algorithms of tin linear interpolation and several other interpolation methods are studied,and the computer program is compiled to compare the interpolation results.The results show that tin5 times interpolation is the most suitable regardless of its effect,boundary conditions and computer program design.

关 键 词：曲面内插 数字高程模型 比较 

分 类 号：U412[交通运输工程—道路与铁道工程]