Journal of the Korean Association of Geographic Information Studies (한국지리정보학회지)

The Korean Association of Geographic Information Studies (한국지리정보학회)
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Construction of Sea-Floor Topographic Survey System Based on Echosounder and GNSS

Echosounder와 GNSS 기반 해저지형측량시스템의 구축

  • Jin-Duk LEE (Dept.of Civil Engineering, Kumoh National Institute of Technology) ;
  • Yong-Jin CHOI (Dept.of Civil Engineering, Kumoh National Institute of Technology, Taegu Science University) ;
  • Jae-Bin LEE (Dongsan Survey E&C Co., Ltd.)
  • 이진덕 (금오공과대학교 토목공학과) ;
  • 최용진 (금오공과대학교 대학원 토목공학과, 대구과학대학교) ;
  • 이재빈 ((주)동산측량이엔씨)
  • Received : 2023.01.25
  • Accepted : 2023.02.19
  • Published : 2023.03.31
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Abstract

A system that extracts seabed topographic information by simultaneously and continuously observing the horizontal position and water depth in the sea by combining a single beam echosounder and GNSS was constructed. By applying the developed system to actual measurements of small-scale sea areas, the effectiveness of bathymetry and sea-floor topographic data acquisition using GNSS and echosounder was examined. By using the developed outdoor program DS-NAV and indoor program DS-CAD and applying the tide level data at the time of actual measurement of the target sea area, it was possible to derive bathymetry results based on the datum level i.e. approximate lowest low water level(A.L.L.W). By using the developed outdoor program DS-NAV and indoor program DS-CAD and applying the tide level data at the time of actual measurement of the target sea area, it was possible to derive the results of bathymetric survey based on the datum level. From database built through the actual measurement. it was possible to create 3D model of the sea-floor topography and extract cross-sections. The results of this study are expected to be economically useful for extracting seabed topographical information from small sea areas or in dredging sites for offshore construction.

본 연구에서는 소규모 해역을 대상으로 한 해양수심측량을 위해 단빔 음향측심기와 GNSS를 조합하여 해상에서 수평위치와 수심을 동시에 연속적으로 관측하여 해저지형정보를 추출하는 시스템을 구축하고 실측에 적용함으로써 수심측량 및 해저지형데이터 획득의 효용성을 검토하고자 하였다. 개발한 외업용 프로그램 DS-NAV와 내업용 프로그램 DS-CAD를 이용하고 대상 해역의 실측 당시 조위데이터를 적용함으로써 기준면(약최저저조면)을 기준으로 한 수심측량 성과를 도출할 수 있었으며, 또한 자동 구축된 데이터베이스로부터 해저지형을 3D 모델링하고 단면도 등을 추출할 수 있었다. 본 연구결과는 소규모 해역에서 해저지형정보를 추출하거나 해상 준설시공현장 등에 경제적으로 활용할 수 있을 것으로 기대된다.

Keywords

Acknowledgement

본 연구는 2020년 금오공과대학교 교내학술연구비(과제번호:202002420001) 지원에 의해 수행되었음.

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