연구 요약
연구 요지 (AI)
지적측량에 적용할 평면직교좌표 체계를 설정하고 투영 왜곡 특성을 분석했다.
초록
The thesis focuses on deriving a new rectangular coordinate system in Korea, which can be effectively applied for a board range of cadastral surveying. To this end, comparative studies of functions used in the transverse cylindrical projection have been theoretically and numerically carried out to understand their distortion characteristics. The functions can be classified according to a way of the mathematical derivation as well as a selection of coefficients and terms, for example Gauss-Schreiber(GS) and Gauss-Kr?ger(GK) types.
Although the transverse cylindrical projection itself is assigned to a system, projected coordinates would be diverse with respect to the function used in the actual calculation. In order to investigate the impact of functions used in the computation, five different equations (i.e., 2 GS and 3 GK) were implemented in this study by using MATLAB. A series of numerical simulation tests has been carried out to compare and characterize them in terms of projection accuracy, difference of projected coordinates and distortion. Furthermore, a comparison between GS and GK function was made under the Korean grid system, consisting of four zones.
Results from the numerical computations were qualitatively analyzed and summarized. Based on the series of the analysis, a single-zone grid system has been firstly derived through reflecting effectiveness of database construction and management. This is followed by analyzing characteristics of its distortion by using scale factor, area distortion and Arc-To-Chord correction. In addition, the four different multiple grid systems comprising more than 3 zones have been numerically analyzed from the standpoint of minimizing the distortion in the East-West direction as well as their relevance to real world applications.
Finally, this research has proposed the single-zone and the three zones system for the most applicable schemes to the cadastral surveying in Korea. Note that the latter system is bounded along the West and East coast lines.
발행 정보
2014. 昌原大學校 국내박사 학위논문