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

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  • Mengjun Kang
  • Mingjun Wang
  • Qingyun Du

Abstract

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.

Suggested Citation

  • Mengjun Kang & Mingjun Wang & Qingyun Du, 2015. "A Method of DTM Construction Based on Quadrangular Irregular Networks and Related Error Analysis," PLOS ONE, Public Library of Science, vol. 10(5), pages 1-17, May.
    • Handle: RePEc:plo:pone00:0127592
    DOI: 10.1371/journal.pone.0127592
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