Abstract
The global navigation satellite system (GNSS)-derived height determination technique is applied in the field of surveying owing to the broad use of GNSS and the development of precise local geoid models. In Korea, this technique was officially adopted in 2020 for public surveying, such as urban facility mapping; it is also treated as an efficient way to unify the vertical datum of the inland and island areas of Korea. Here, GNSS surveying was conducted on 19 stations located in Korea’s coastal regions and islands, and GNSS-derived elevations were determined. When each GNSS-derived elevation was compared with elevations from spirit leveling, all stations showed differences of less than 3 cm when GNSS surveying was conducted for 4 h/day over two days; they were smaller than 5 cm with 2 h of surveying. These differences meet the standards of GNSS-de-rived elevations in Korea. In addition, GNSS-derived elevations were compared with those ob-tained via sea-crossing leveling in two regions, showing differences smaller than 1 cm. Sea-crossing leveling takes longer than GNSS-derived height determination, and its accuracy can be significantly affected by various environments, such as sea fog. Thus, GNSS-derived height determination rep-resents a practical and useful technique.
Original language | English |
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Article number | 5310 |
Journal | Applied Sciences (Switzerland) |
Volume | 11 |
Issue number | 11 |
DOIs | |
State | Published - 1 Jun 2021 |
Keywords
- GNSS
- GNSS-derived height determination
- Geoid
- Sea-crossing leveling