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우리나라 산악지에서의 정밀표고 결정

Precise Height Determination in Mountainous Areas of South Korea

  • 이석배 (경남과학기술대학교 토목공학과) ;
  • 어수창 (경남과학기술대학교 토목공학과)
  • Lee, Suk-Bae (Department of Civil Engineering, Gyeongnam National University of Science and Technology) ;
  • Auh, Su-Chang (Graduate School of Gyeongnam National University of Science and Technology)
  • 투고 : 2018.10.04
  • 심사 : 2018.11.22
  • 발행 : 2018.12.10

초록

본 연구는 우리나라 산악지에서의 정밀표고결정을 목적으로, 지리산 지역을 테스트베드로 선정하고 테스트베드 내의 44점의 수준점에 대하여 중력측정 및 GNSS 관측을 실시하고 측정결과를 바탕으로 표고보정량과 표고를 계산하고 연구한 논문이다. 계산에 있어서는 역학보정량과 정사보정량 및 정규보정량을 계산하였으며 이를 적용한 역학고와 정표고 그리고 정규고를 계산하였다. 연구결과 정규중력과 실측중력의 차이를 규명해 내었고 또 정사보정량과 정규보정량의 차이를 규명할 수 있었다. 또한 정규정표고 체계를 유지하고 있는 현재의 수준점 고시성과와 본 연구에서 계산된 정표고 값을 비교한 결과는 우리나라의 수준점 성과체계가 정규정표고 체계에서 정표고 체계로의 전환하여야 함을 보여주고 있었다. 테스트베드내에서 정사보정량과 정규보정량의 차이는 최소 -234.41 mm에서 최대 196.925 mm의 분포를 나타냈고, 현재의 수준점 고시성과와 본 연구에서 계산된 정표고와의 차이는 -0.121 m에서 0.011 m의 차이를 보여주는 것을 알 수 있었다.

The purpose of this study is to determine the precise height in mountainous areas of South Korea and Jiri mountain area was selected as a test bed for the study. Gravity observation and GNSS surveying were performed for 44 BM(Benchmark) points in the test bed and calculate the height and the height correction. In the calculation, the dynamic correction amount, the orthometric correction amount and the normal correction amount were calculated, and the dynamic height and orthometric height and the normal height were calculated considering each correction amount. The results showed that the difference between normal gravity and observed gravity and also the difference between orthometric correction and the normal correction. In addition, the results of the comparison of the present official BM height and the computed orthometric height in this study show that Korean height system should be shifted from the normal orthometric height system to the orthometric height system. Because the difference between the orthometric correction and the normal correction within the test bed indicated a distribution of at a minimum of -234.41 mm up to 196.925 mm, and the difference between the present official BM height and the calculated orthometric height were distributed from -0.121m to 0.011 m.

키워드

참고문헌

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