Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Applicability Analysis of Measurement Data Classification and Spatial Interpolation to Improve IUGIM Accuracy

지하공간통합지도의 정확도 향상을 위한 계측 데이터 분류 및 공간 보간 기법 적용성 분석

  • 이상연 (인하대학교 토목공학과) ;
  • 송기일 (인하대학교 토목공학과) ;
  • 강경남 (인하대학교 건설환경시스템연구소) ;
  • 김우람 ((주)베이시스소프트) ;
  • 안준상 ((주)베이시스소프트)
  • Received : 2022.06.30
  • Accepted : 2022.07.21
  • Published : 2022.10.31
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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.

최근 지하 안전에 관한 다양한 이슈들로 인해 지하공간 또는 지하시설물의 관리 필요성이 대두대고 있어 지하공간 통합지도 활용이 필요한 실정이다. 지하공간통합지도는 지하공간개발 및 지하안전관리 등의 분야에 직접적으로 사용되고 있기 때문에, 정보의 최신성 및 정확성이 매우 중요하다. 본 연구에서는 지하공간통합지도에 정확성을 향상시키기 위해 지하공간통합지도에 저장된 데이터와 굴착현장에서 획득 가능한 계측데이터를 분류하고, 획득된 데이터를 활용하여 다양한 보간기법의 적용성을 평가하였다. 공간 보간은 보간기법 및 모델별 총 7 종의 공간보간결과를 교차검증을 통해 정량적 평가를 수행하였다. 교차검증 결과, NURBS, 크리깅 및 역거리가중치법 순으로 정확도가 감소하는 것으로 나타났다. 또한 크리깅의 경우 베리오그램 모델에 따라 정확도의 차이가 있었으나 미미하였고, 구형 베리오그램이 정확도가 가장 우수한 것으로 나타났다.

Keywords

Acknowledgement

본 연구는 국토교통부/국토교통과학기술진흥원의 지원으로 수행되었음(과제번호 22DCRU-C158167-03).

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