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http://dx.doi.org/10.11108/kagis.2021.24.1.080

Utilization of UAV Photogrammetry for Actual Condition Survey of Government Owned Lands  

LEE, Si-Wook (Yeongcheon Branch Office, Korea Land and Geospatial Informatix Corporation)
LEE, Jin-Duk (Dept. of Civil Engineering, Kumoh National Institute of Technology)
Publication Information
Journal of the Korean Association of Geographic Information Studies / v.24, no.1, 2021 , pp. 80-91 More about this Journal
Abstract
The purpose of this study is to present the applicability to the effective survey into the actual condition of lands such as analysis of occupied location of government owned lands based on orthoimages created from aerial photographs taken by UAV. The boundary point coordinates and areas of the parcels were observed respectively by VRS-GNSS surveying and orthoimages for each land use of two categories of land, i.e. building site and farmland. As a result of comparing boundary point coordinates and areas extracted from UAV orthoimages with VRS-GNSS surveying data which were used as reference data, the RMS error of the coordinates for the boundary points was ±0.074m for both X and Y in the building site, and ±0.150m and ±0.127m for the X and Y respectively in the farmland. The positional error of the boundary point was 1.7~ 2 times higher in the farmland than in the building site where the boundary points were relatively clear. The RMS error of ±8.964㎡ of areas in the farmland was 4.7 times higher than that of ±1.898㎡ of areas in the building site. The area errors of all 22 parcels measured from the orthoimage were found to be within the allowed error range, indicating that it is feasible to apply the orthoimage generated by UAV to survey of government owned lands in terms of accuracy.
Keywords
Unmanned Aerial Vehicle(UAV); Aerial Photo; VRS-GNSS; Orthoimage; Government Owned Lands;
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