구소삼각지역에서 지적측량에의 활용을 위한 수치정사사진 생성 및 정확도 분석

구소삼각지역의 지적측량에 활용할 수치정사사진을 제작하고 정확도를 분석했다.

Lately digital cadastral maps which were digitized on the basis of paper cadastral maps are used for cadastral survey, it still remains the graphical cadastral problems regarding map matching. Furthermore, the inherent problems which have been hidden become apparent, and people are paying attention to their solutions. The National Assembly recently suggested a 'special legislation for land survey (draft)' to solve such problems, but it entails in-field survey (re-survey) which requires excessive time and cost. Due to such problems, in foreign countries they use cadastral resurvey using aerial photographs.

This study aims to research the accuracy of the digital orthophotos created automatically from aerial photographs and to review the method of using orthophotos at the Old-Triangulation region by utilizing the orthophotos, and the cadastral maps which are currently used for cadastral survey at the Old-Triangulation region and ground control points (GCP) obtained from GPS surveying, overlapping the cadastral maps through shifting and rotation, and comparing the parcel coordinates of each cadastral map.

In our country, it is not yet legally allowed to use aerial photos for cadastral survey, but use of aerial photos may increase in generating cadastral maps if it is allowed to use aerial photo for cadastral survey. In Addition, three dimensional visualization of survey result can meet the various needs of customers; and if a 3D GIS is established through connection with the database such as cadastral register and official register, it will be possible to manage the land information efficiently and complete a multi-purpose cadastral map.