New Technology for a New Century
International Conference 
FIG Working Week 2001, Seoul, Korea 611 May 2001

Abstracts

THE CURRENT STATUS OF GPS NETWORK, DATUM TRANSFORMATION AND REAL TIME KINEMATIC GPS POSITIONING IN KOREA

Chulsoo YANG and Sangsoo KIM, Korea

Key words: GPS network, datum transformation, geoid height, RTK positioning.


Abstract

Current status of GPS network, datum transformation and real time kinematic GPS positioning in Korea is investigated. Datum transformation from Korean geodetic system to WGS-84 shows that apparent differences between the Korean datum and WGS-84 horizontal coordinates for the same point are approximately -11.5 to -10.2 seconds in latitude and 7.2 to 8.3 second in longitude. The posterior RMS difference between them is 35cm. The orthometric heights by WGS-84 ellipsoidal height and local geoid model showed 12cm RMS differences from the national datum. In addition, it is remarkable that the test of RTK-GPS positioning for cadastral surveying showed cm-level accuracy whose baseline lengths more than 20km.


CONTACT

Chulsoo Yang
Chief Researcher Cadastral Technology Research Institute
Korea Cadastral Survey Corporation (KCSC)
624 Unhak Dong
Youngin
Kyunggi
KOREA
Tel. + 82 31 339 4475
Fax + 82 31 335 0853
E-mail: csyang@kcsc.co.kr

Sangsoo Kim
Director
Department of Cadastre
Ministry of Government and Home Affairs
Tel. + 82 2 3703 5061
Fax + 82 2 3703 5555
E-mail: kssu@mogaha.go.kr

23 March 2001


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