지적측량을 위한 Network RTK-GPS의 적용에 관한 연구 = (A) study on the application of Network RTK-GPS for cadastral survey

다국어 초록 (Multilingual Abstract)

The types of Network RTK which have been developed so far are of two types VRS(Virtual Reference Station) method of the Trimble company of Germany, and GNSMART/GEO++ jointly developed by GEO++ and Leica of Germany which is an intial model, and now there is a MAC method of Spider Net which was independently complemented and developed based on the initial version.
In this study, a network of MAC type was constructed in the Gyeonggi-do area to analyze the usefulness and validity of the Network RTK-GPS. 6 sites were selected to conduct GPS observation for 24 hours, and the impact of multipath resulting from the changes in the sky visibility and satellite elevation angle and signal-to-moise ratio was analyzed. By determining the ITRF of each site, coordinates were determined in connection with IGS network.
Then, 21 check points were established in Gimpo area of Gyeonggi-do, and static survey was performed at 4-hour interval and for each check point, observation has been done at least in 7 times of Network RTK survey at 20 seconds of retrieval intervals.
The result showed high accuracy in the difference between the coordinates determined immediately by the in-field network survey and the current performance was 1-2cm.
Through the results obtained by this study, the merits of the Network RTK method over a single RTK method were identified. Its biggest benefit is the expanded range of survey and efficiency of practice. Particulary, within the range where a network is established, if an existing control point is lost, it is possible to recover it accurately on the spot; and it was proven by this experiment that, in case of a newly established point, it is possible to set up one immediately on/at the desired place and time immediately.
In summary, it is proved that a network survey has the accuracy, scalability and efficiency and it is expected that the network survey will contribute to the cadastral survey.
This study proposed the necessity for establishment of a nationally integrated network.

목차 (Table of Contents)

• Abstract
• 목차 = ⅰ
• 표차례 = ⅲ
• 그림차례 = ⅳ
• 제1장 서론 = 1
• 1.1 연구배경 = 1
• 1.2 연구의 필요성 및 목적 = 2
• 1.3 연구내용 및 범위 = 3
• 제2장 Network RTK의 국내외 연구동향 = 5
• 2.1 GPS 상시관측소의 국내현황 = 5
• 2.2 Network RTK의 국내 연구동향 = 9
• 2.3 Network RTK의 국외연구동향 = 10
• 2.3.1 독일의 연구동향 = 10
• 2.3.2 스웨덴의 연구동향 = 11
• 2.3.3 유럽의 network 구축현황 분석 = 13
• 제3장 Network RTK-GPS = 15
• 3.1 Network RTK의 개요 = 15
• 3.2 Network RTK의 종류 및 특성비교 = 16
• 3.2.1 가상기준점 방식 = 16
• 3.2.2 VRS의 문제점 = 21
• 3.2.3 MAC 방식 = 22
• 3.3 Spider Net 실험사례 = 28
• 3.3.1 성능 비교(Static) = 28
• 3.3.2 정확도 비교 = 31
• 3.3.3 사용자 측면의 장점 = 33
• 제4장 실험관측 및 분석 = 36
• 4.1 연구지역 선정 및 Site Server 구축 = 36
• 4.2 사이트(Site) 정밀 ITRF 산출 = 46
• 4.3 현장 적용실험 = 52
• 4.3.1. 재현성(Repeatability) 실험 = 52
• 4.3.2 지역좌표 변환 실험 = 61
• 제5장 결론 = 73
• 참고문헌 = 75
• 감사의 글 = 77