Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography (한국측량학회지)

Korean Society of Surveying, Geodesy, Photogrammetry and Cartography (한국측량학회)
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Evaluation of Geospatial Information Construction Characteristics and Usability According to Type and Sensor of Unmanned Aerial Vehicle

무인항공기 종류 및 센서에 따른 공간정보 구축의 활용성 평가

  • Chang, Si Hoon (Dept. of Civil Engineering, Chungnam National University) ;
  • Yun, Hee Cheon (Dept. of Civil Engineering, Chungnam National University)
  • Received : 2021.12.04
  • Accepted : 2021.12.24
  • Published : 2021.12.31
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Abstract

Recently, in the field of geospatial information construction, unmanned aerial vehicles have been increasingly used because they enable rapid data acquisition and utilization. In this study, photogrammetry was performed using fixed-wing, rotary-wing, and VTOL (Vertical Take-Off and Landing) unmanned aerial vehicles, and geospatial information was constructed using two types of unmanned aerial vehicle LiDAR (Light Detection And Ranging) sensors. In addition, the accuracy was evaluated to present the utility of spatial information constructed through unmanned aerial photogrammetry and LiDAR. As a result of the accuracy evaluation, the orthographic image constructed through unmanned aerial photogrammetry showed accuracy within 2 cm. Considering that the GSD (Ground Sample Distance) of the constructed orthographic image is about 2 cm, the accuracy of the unmanned aerial photogrammetry results is judged to be within the GSD. The spatial information constructed through the unmanned aerial vehicle LiDAR showed accuracy within 6 cm in the height direction, and data on the ground was obtained in the vegetation area. DEM (Digital Elevation Model) using LiDAR data will be able to be used in various ways, such as construction work, urban planning, disaster prevention, and topographic analysis.

최근 공간정보 구축 분야에서 무인항공기는 신속한 데이터 취득과 활용이 가능하여 활용이 증대되고 있으며, 고정익, 회전익, 수직이착륙형 등 다양한 형태의 무인항공기가 출시되고 있다. 본 연구에서는 고정익, 회전익, 수직이착륙형 무인항공기를 이용하여 사진측량을 수행하였으며, 2가지 종류의 무인항공 LiDAR (Light Detection And Ranging) 센서를 이용하여 공간정보를 구축하였다. 또한, 무인항공 사진측량 및 LiDAR를 통해 구축된 공간정보의 활용성을 제시하기 위해 정확도를 평가하였다. 정확도 평가 결과 무인항공 사진측량을 통해 구축된 정사영상은 수평방향 2cm 이내의 정확도를 나타내었다. 구축된 정사영상의 GSD (Ground Sample Distance)가 2cm 정도임을 볼 때 무인항공 사진측량 성과물의 수평방향 정확도는 GSD 이내로 판단된다. 무인항공 LiDAR를 통해 구축된 공간정보는 높이방향으로 평균 6cm 이내의 정확도를 나타내었으며 식생 지역에서 지면에 대한 데이터 취득이 가능하였다. LiDAR 데이터를 활용한 DEM (Digital Elevation Model)은 건설시공, 도시계획, 재난 예방, 지형분석 등 다양한 활용이 가능할 것이다.

Keywords

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