From 2012 to 2030, the government is reorganizing the land under the name of the cadastral re-investigation project. This is to solve the problem of cadastral inconsistency and the problem of poor accuracy of cadastral information due to outdated tech...
From 2012 to 2030, the government is reorganizing the land under the name of the cadastral re-investigation project. This is to solve the problem of cadastral inconsistency and the problem of poor accuracy of cadastral information due to outdated technology during the Japanese colonial era. Due to the cadastral re-investigation project, as the Korean survey standard is changed to the GRS-80 ellipsoid used in the world geodetic system instead of the Bessel ellipsoid suitable for the Japanese colonial rule, this paper proposes a boundary restoration survey method using the world geodetic standard drone.
The ‘drone photogrammetry’ method using the existing drone is a method of processing high-resolution image files taken with a drone and using the results in the form of orthographic images, DSM, and numerical maps for surveying. Since this method requires post-processing, the results cannot be viewed immediately, and there are disadvantages in that proper results cannot be obtained if there is a place covered by shadows. In addition, the electronic flat plate method used for existing boundary restoration surveys had problems due to pain and heavy surveying equipment. Considering these shortcomings, we built a Mobile GCS that controls the operation of the drone and performs surveying by clicking the mobile screen, and a survey drone that communicates with the Mobile GCS was produced. To improve the accuracy of the survey drone, RTK GPS and a gimbal that controls the shaking of the laser that displays the boundary point coordinates were attached, and the effect was verified through experiments.
Accuracy was tested based on a public point located within Kunsan University (latitude: 35.9427195389, longitude: 126.680261950). The difference between these two measurement values is presumed to have occurred because the user did not measure the exact point indicated by the laser, or the user did not measure at the same height and tilted to either side. However, this is a value within an error of 8 cm officially recognized in cadastral surveying, and it is judged to be a sufficiently acceptable value. The phenomenon of increasing the error range due to the influence of wind seems to be controllable through stabilization of the aircraft.