GNSS/Leveling 방법에 의한 지리산 일대의 기하학적 지오이드고 산정

초록

Today, research on the introduction of geoid and height to the field of cadastre has become activeunder the issue of a three-dimensional cadastre. In this study, as a basis for proceeding to athree-dimensional cadastre, the acquisition of geometric geoidal height was studied. For the study,study area including benchmark line in and around Jiri mountain was selected and GNSS surveyingwas performed in the study area, And finally the geometric geoidal height was calculated byGNSS/Leveling method. This geometric geoidal height was compared to the geoid of EGM2008 earthgeopotential model and KNGeoid13 Korean geoid model. And, also two hybrid geoidal heights werecalculated by combination of this geometric geoidal height and EGM2008/KNGeoid13 geoid,respectively and the accuracy was evaluated through the difference analyses. The results showed thatRMS(Root Mean Square) of the difference of EGM2008 and KNGeoid13 were ±18.2cm and ±7.2cm andRMS of the two hybrid geoid were ±8.4cm and ±5.9cm, respectively.

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