基于等高线约束三角网的格网DEM精度评估方法  

Study on the algorithm for accuracy evaluation of DEM based on constraint Delaunay triangulation

作　　者：徐道柱[1,2] 张卫柱[2] 田浩 熊顺[2] 

机构地区：[1]信息工程大学地理空间信息学院 [2]西安测绘研究所 [3]61363部队

出　　处：《测绘工程》2013年第2期75-78,共4页Engineering of Surveying and Mapping

摘　　要：在分析DEM精度评估方法中检查点方法优缺点的基础上,提出基于等高线约束三角网的格网DEM精度评估方法,采用定性和定量相结合的方法实现DEM数据的自动评估,利用实际数据进行实验,分析误差的数值分布和空间位置分布,对现行数据标准中的采样点数量、采样点分布和中误差等指标进行分析,提出改进意见。算法在其它地貌类型中的可行性需要进一步研究。It presents the algorithm for accuracy evaluation of DEM, analyzes the advantages and disadvantages of checkpoint method, and proposes a method of accuracy evaluation of DEM based on constraint Delaunay triangulation, which method uses qualitative analysis and quantitative analysis to carry out the accuracy evaluation of DEM automatically. The actual data in the experiment are used to analyze the numeric feature and the spatial distribution of error, the index of point number, point distribution and mean square error, and the modification advice is provided of the actual data acceptance criterion. The feasibility of this algorithm in other kinds of terrain needs further study.

关 键 词：DEM精度评估 约束Delaunay三角网 地貌类型 

分 类 号：P208[天文地球—地图制图学与地理信息工程]