%0 Journal Article
%T GRID-BASED DEM CONSTRUCTION BY MEANS OF COONS PATCH<br>数字高程模型构建的Coons曲面片法
%A Chen Chuanfa
%A <br>陈传法
%J 大地测量与地球动力学
%D 2012
%I 
%X 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.
%K Coons patch
%K interpolation
%K DEM(Digital Elevation Model)
%K sampling density
%K terrain complexity<br>Coons曲面
%K 插值
%K 数字高程模型
%K 采样密度
%K 地形复杂度
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=DA72A78627FE64EAA572951EA05D274A&jid=73A1A428591E600EF664B596512A2997&aid=21CB0722CA48644FF29F157A2CBABBF0&yid=99E9153A83D4CB11&vid=9971A5E270697F23&iid=E158A972A605785F&sid=117F81797AB182FC&eid=CFAC5CB624A41AFD&journal_id=1671-5942&journal_name=大地测量与地球动力学&referenced_num=0&reference_num=0