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

PLoS One. 2015 May 21;10(5):e0127592. doi: 10.1371/journal.pone.0127592. eCollection 2015.

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.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Algorithms
  • Models, Theoretical*

Grant support

This work is supported by the National Natural Science Foundation of China (Grant no. 41201403) whose website is http://www.nsfc.gov.cn, and Mengjun Kang received this funding. The funders had an important role in study design, data collection and analysis, decision to publish, and preparation of the manuscript.