title: A Method of DTM Construction Based on Quadrangular Irregular Networks and Related Error Analysis.
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.
authors.affiliation: School of Resource and Environment Science, Wuhan University, Wuhan 430079, China; Key laboratory of Geographic Information System, Ministry of Education, Wuhan University, Wuhan 430079, China.
authors.forename: Mengjun
authors.initials: M
authors.lastname: Kang
authors.affiliation: School of Resource and Environment Science, Wuhan University, Wuhan 430079, China; Key laboratory of Geographic Information System, Ministry of Education, Wuhan University, Wuhan 430079, China.
authors.forename: Mingjun
authors.initials: M
authors.lastname: Wang
authors.affiliation: School of Resource and Environment Science, Wuhan University, Wuhan 430079, China; Key laboratory of Geographic Information System, Ministry of Education, Wuhan University, Wuhan 430079, China.
authors.forename: Qingyun
authors.initials: Q
authors.lastname: Du
mesh_terms: D000465:Algorithms; D008962:Models, Theoretical