New Technology for a New Century
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.
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.
23 March 2001
This page is maintained by the FIG Office. Last revised on 15-03-16.