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http://dx.doi.org/10.7843/kgs.2022.38.10.17

Applicability Analysis of Measurement Data Classification and Spatial Interpolation to Improve IUGIM Accuracy  

Lee, Sang-Yun (Dept. of Civil Engrg., INHA Univ.)
Song, Ki-Il (Dept. of Civil Engrg., INHA Univ.)
Kang, Kyung-Nam (Research Institute of Construction & Environmental System, Inha Univ.)
Kim, Wooram (BasisSoft, Inc.)
An, Joon-Sang (BasisSoft, Inc.)
Publication Information
Journal of the Korean Geotechnical Society / v.38, no.10, 2022 , pp. 17-29 More about this Journal
Abstract
Recently, the interest in integrated underground geospatial information mapping (IUGIM) to ensure the safety of underground spaces and facilities has been increasing. Because IUGIM is used in the fields of underground space development and underground safety management, the up-to-dateness and accuracy of information are critical. In this study, IUGIM and field data were classified, and the accuracy of IUGIM was improved by spatial interpolation. A spatial interpolation technique was used to process borehole data in IUGIM, and a quantitative evaluation was performed with mean absolute error and root mean square error through the cross-validation of seven interpolation results according to the technique and model. From the cross-validation results, accuracy decreased in the order of nonuniform rational B-spline, Kriging, and inverse distance weighting. In the case of Kriging, the accuracy difference according to the variogram model was insignificant, and Kriging using the spherical variogram exhibited the best accuracy.
Keywords
Integrated underground geospatial information map; Inverse distance weighting; Kriging; Nonuniform rational B-spline; Spatial interpolation;
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