GPS 상시관측망과 VRS-RTK를 이용한 지적측량 정확도 분석 : 거제시 사례를 중심으로

GPS 상시관측망과 VRS-RTK를 이용한 지적측량의 정확도를 분석했다.

Recently, using the satellites due to the development of GPS surveying was able to get fast and accurate results. Particularly, RTK(Real Time Kinematic) and VRS(Virtual Reference System) which enable to accomplish the real time-base survey have been increasingly popular. Currently, National Geographic Information Institute provides VRS service using 45 Permanent GPS Networks. Since the VRS provides high-precision coordinate in a short time, the users and applications are expected to be rapidly increasing. The accuracy analysis on the VRS service, however, was not sufficiently performed yet.

Therefore, in this study, the VRS data is acquired from various circumstances and its accuracy is analyzed. According to analysis, it was concluded that the VRS could be applied to cadastral survey. This study was intended to compare the coordinates by supplementary control point with those by VRS-RTK surveying in an effort to evaluate the errors and efficiency of VRS-RTK surveying. And VRS-RTK surveying was applied to survey the supplementary control point after selecting the site so as to apply it to cadastral survey. In addition, the positioning accuracy tend to deteriorate as the distance between the rover and base station increases in the VRS-RTK surveying.

To analysis this problem, VRS data was analyzed with 2 different sites within and without the GPS Networks in order to accomplish the purpose of this study. As a result of surveying the supplementary control points at 90 locations, RMSE of connection error appeared to have been ±0.03m in Aju-dong and ±0.03m in Seongpo-ri. Such a result was what within the tolerance specified in cadastral law, which indicated the possibility of VRS-RTK surveying in cadastral field.