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http://dx.doi.org/10.22640/lxsiri.2021.51.1.79

A Study on Decision Making of Cadastral Surveying Results using Drone Photogrammetry  

Lim, Seong-Ha (Korea Land and Geospatial Informatix Corporation)
Kim, Ho-Jong (Korea Land and Geospatial Informatix Corporation)
Lee, Don-Sun (Spatial Information Research Institute)
Publication Information
Journal of Cadastre & Land InformatiX / v.51, no.1, 2021 , pp. 79-95 More about this Journal
Abstract
This study evaluates the applicability of determining cadastral surveying results using drone photogrammetry during the phase of determining cadastral surveying results, which is the most important stage of cadastral surveying, but known to be hardly objective and highly probable in causing a subjective misjudgment or mistake made by a surveyor. In the experiment to analyze the accuracy of boundary point extraction from drone photogrammetry results, by comparing the coordinate area of 22 parcels extracted from 2D and 3D images with the coordinate area measured from ground survey, the difference could be quantified as RMSE of 1.44m2 for 2D and 0.32m2 for 3D images. In addition, experiments to evaluate the determination of cadastral surveying result based on drone photogrammetry survey showed the RMSE measure of 0.346m towards N direction and 0.296m towards Y direction in comparison to the existing surveying results through data investigation. Based on these experiments, it is judged that cadastral surveying result based on drone photogrammetry can be determined without needing to conduct a location survey with an accuracy of approximately 0.3m in the graphical area, which also leads to possibility of reducing individual errors if drones images are used along with ground survey by objectifying the process of cadastral surveying results.
Keywords
Decision making of cadastral surveying results; Drone photogrammetry; Graphical cadastre; Boundary extraction;
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