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http://dx.doi.org/10.7319/kogsis.2014.22.3.047

Analysis of National Vertical Datum Connection Using Tidal Bench Mark  

Yoon, Ha Su (Dept. of Geoinformatics, University of Seoul)
Chang, Min Chol (Dept. of Geoinformatics, University of Seoul, Hydrographic Survey Division, Korea Hydrographic and Oceanographic Administration)
Choi, Yun Soo (Dept. of Geoinformatics, University of Seoul)
Huh, Yong (Oceangraphic Observation Division, Korea Hydrographic and Oceanographic Administration)
Publication Information
Journal of Korean Society for Geospatial Information Science / v.22, no.3, 2014 , pp. 47-56 More about this Journal
Abstract
Recently, the velocity of sea-level rising has increased due to the global warming and the natural disasters have been occurred many times. Therefore, there are various demands for the integration of vertical reference datums for the ocean and land areas in order to develop a coastal area and prevent a natural disaster. Currently, the vertical datum for the ocean area refers to Local Mean Sea Level(LMSL) and the vertical datum for the land area is based on Incheon Mean Sea Level(IMSL). This study uses 31 points of Tidal Gauge Bench Mark (TGBM) in order to compares and analyzes the geometric heights referring LMSL, IMSL, and the nationally determined geoid surface. 11 points of comparable data are biased more than 10 cm when the geometric heights are compared. It seems to be caused by the inflow of river, the relocation of Tidal Gauge Station, and the topographic change by harbor construction. Also, this study analyze the inclination of sea surface which is the difference between IMSL and LMSL, and it shows the inclination of sea surface increases from the western to southern, and eastern seas. In this study, it is shown that TGBM can be used to integrate vertical datums for the ocean and land areas. In order to integrate the vertical datums, there need more surveying data connecting the ocean to the land area, also cooperation between Korea Hydrographic and Oceanographic Administration and National Geographic Information Institute. It is expected that the integrated vertical datum can be applied to the development of coastal area and the preventative of natural disaster.
Keywords
Tidal Bench Mark(TBM); Local Mean See Level(LMSL); Incheon Mean See Level(IMSL); Geoid Model; Sea Level Slope;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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