Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Construction of Precise Local Geoid using GPS/Leveling

GPS/Leveling을 이용한 정밀 지역 지오이드 구축

  • Park, Joon-Kyu (Department of Civil Engineering, Seoil University) ;
  • Ahn, Jong-Soon (Department of Civil Engineering, Chungnam National University)
  • 박준규 (서일대학교 토목과) ;
  • 안종순 (충남대학교 대학원 토목공학과)
  • Received : 2014.04.03
  • Accepted : 2014.07.10
  • Published : 2014.07.31
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Abstract

A geoid has great meaning as a vertical reference plane, and at this point when GPS measurement is vitalized, it is an important factor that makes level measurements with GPS possible. This study carried out GPS and leveling of newly created complex control points targeting Daejeon. The geoid for the precise area was built by calculating the plane location, elevation and the geoid of each reference point using GPS/Leveling. In addition, this study evaluated the potential of GPS leveling throughout the site calibration. The geoid for the precise area intervals of approximately 1.5km throughout the study was determined. The results highlight the possibility of leveling by estimating direct leveling performance and mean altitude deviation by less than 2cm. Based on the results, if a geoid model for the precise and wide area can be developed throughout ongoing research, survey tasks that require elevation can be streamlined and the efficiency maximized.

지오이드는 수직기준면으로서의 큰 의미를 지니며, GPS측량이 활성화되고 있는 현시점에서 GPS를 이용한 표고측정을 가능케 하는 중요한 요소가 되고 있다. 이에 본 연구에서는 대전광역시를 대상으로 신설된 복합기준점에 대한 GPS 및 수준측량을 수행하고 GPS/Leveling을 통해 각 기준점들의 평면위치, 표고 및 지오이드고를 산출하여 정밀 지역 지오이드를 구축하였다. 또한 사이트 캘리브레이션을 통해 GPS 수준측량의 가능성을 평가하였다. 연구를 통해 약 1.5km 간격의 정밀 지역 지오이드를 구축하였으며, GPS 수준측량을 통해 직접 수준측량 성과와 평균 2cm 이내 편차로 표고를 산정함으로써 GPS 수준측량의 가능성을 제시하였다. 연구결과를 바탕으로 지속적인 연구를 통해 광역 정밀 지오이드 모델이 개발된다면 표고를 요구하는 측량업무의 간소화 및 효율성의 극대화가 가능할 것이다.

Keywords

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