数字高程模型构建的Coons曲面片法  

GRID-BASED DEM CONSTRUCTION BY MEANS OF COONS PATCH

作　　者：陈传法[1] 

机构地区：[1]山东科技大学测绘科学与工程学院,青岛266590

出　　处：《大地测量与地球动力学》2012年第4期87-89,98,共4页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(41101433);海岛(礁)测绘技术国家测绘地理信息局重点实验室开放基金(2011B10);中国科学院海岸带环境过程重点实验室开放基金(201209);山东省"泰山学者"建设工程专项经费项目

摘　　要：基于Coons曲面片实现了格网DEM构建,并将其模拟结果与传统插值方法如IDW、SPLINE和KRIGING进行比较。分析地形复杂度和采样间距对Coons模拟结果表明,随着地形复杂度的提高以及采样密度的降低,模拟精度逐步降低,其中,IDW精度最低,KRIGING和SPLINE次之,Coons模拟结果精度最高。Coons以其高计算效率和高模拟精度可用于DEM构建。A method of grid-based DEM construction in terms of Coons patch has been presented.Two examples including a numerical test and a real-world example were employed to comparatively analyze the simulation errors of Coons patch and the classical interpolation methods including IDW,SPLINE and KRIGING.Gaussian synthetic surfaces with various terrain complexity controlled by coefficient parameters were simulated and the results indicated that with the increase of terrain complexity,the simulation errors of all the methods will increase as well.The Coons patch is much more accurate than the classical methods.The real-world example was used to test the effect of sampling interval on the simulation accuracies of all the interpolators.The results indicate that sampling interval has a negative effect on the simulation accuracy.However,the Coons patch is more accurate than the classical interpolation methods regardless of sampling interval.In terms of simulation accuracy and computing speed,Coons patch can be considered as an alternative method for DEM construction.

关 键 词：COONS曲面 插值 数字高程模型 采样密度 地形复杂度 

分 类 号：P207[天文地球—测绘科学与技术]