A Method of DTM Construction Based on Quadrangular Irregular Networks and Related Error Analysis.

A Method of DTM Construction Based on Quadrangular Irregular Networks and Related Error Analysis.
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DOI:
10.1371/journal.pone.0127592
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发表时间:
2015
期刊:
影响因子:
3.7
通讯作者:
Du Q
Du Q
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Kang M;Wang M;Du Q

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提出了一种基于四边形不规则网格(QIN)的数字地面模型(DTM)构建方法,该方法考虑了所有原始数据点,并具有拓扑矩阵。通过数值试验和实际算例对比分析了QIN与经典插值方法和其他DTM表示方法(包括SPLINE、KRIGING和不规则三角网)的精度。数值试验表明,QIN方法是四种方法中精度第二高的方法。在现实世界的例子中,DTMs构造使用QIN和三个经典的插值方法。结果表明,QIN方法是测试的最准确的方法。精度等级的差异似乎是由采样数据点的位置引起的。虽然QIN方法有缺点,但它是DTM构建的替代方法。
A new method of DTM construction based on quadrangular irregular networks (QINs) that considers all the original data points and has a topological matrix is presented. A numerical test and a real-world example are used to comparatively analyse the accuracy of QINs against classical interpolation methods and other DTM representation methods, including SPLINE, KRIGING and triangulated irregular networks (TINs). The numerical test finds that the QIN method is the second-most accurate of the four methods. In the real-world example, DTMs are constructed using QINs and the three classical interpolation methods. The results indicate that the QIN method is the most accurate method tested. The difference in accuracy rank seems to be caused by the locations of the data points sampled. Although the QIN method has drawbacks, it is an alternative method for DTM construction.
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