复杂地貌地形图等高线内插DEM算法的精度分析  

Analysis and Comparison of Contour Interpolation in the Complicated Landform Region

作　　者：徐潇[1] 谭衢霖[1] 王浩宇[1] 胡吉平[1] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044

出　　处：《遥感信息》2013年第6期111-115,共5页Remote Sensing Information

基　　金：国家自然科学基金项目(51078020);中央高校基本科研业务费专项项目(2012JBM078)

摘　　要：对复杂地貌条带地形图进行了等高线矢量化,利用5种典型的插值方法生成DEM,探讨基于等高线插值生成DEM不同算法的精度并评价生成的DEM的质量。结果表明,IDW算法生成的DEM精度较高,且在其上提取的等高线与原始等高线吻合度较好,分层设色图能够较好地反映研究区的真实地形。TIN精度仅次于IDW,但此方法是目前最为成熟和快速的一种算法。自然邻域法的精度与TIN相近,高于样条函数法;kriging插值算法精度最差,不宜在复杂地貌区域使用。Based on contour vectorization of complex geomorphologic stripe topographic map,five interpolation methods were used to generate DEMs,and the accuracies of the generated DEMs were analyzed and compared.Results show that the accuracy of IDW is the highest,and the contours extracted from its DEM are consistent with the original ones,meanwhile the hypsometric maps can reflect the real topography in study area.As one of the most mature and fastset algorithm,the accuracy of TIN is just lower than that of IDW.The accuracy of natural neighborhood method is similar to TIN's,and better than the spline-function method.The accuracy of Kriging is the lowest which does not suit for complex topographic region.

关 键 词：复杂地貌地形图 等高线 内插方法 DEM 精度比较 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]