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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Forest Fire Damage Assessment Using UAV Images: A Case Study on Goseong-Sokcho Forest Fire in 2019

  • Yeom, Junho (Dept. of Civil Engineering, Gyeongsang National University) ;
  • Han, Youkyung (School of Convergence & Fusion System Engineering, Kyungpook National University) ;
  • Kim, Taeheon (Dept. of Geospatial Information, Kyungpook National University) ;
  • Kim, Yongmin (LX Spatial Information Research Institute)
  • Received : 2019.09.25
  • Accepted : 2019.10.22
  • Published : 2019.10.31
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Abstract

UAV (Unmanned Aerial Vehicle) images can be exploited for rapid forest fire damage assessment by virtue of UAV systems' advantages. In 2019, catastrophic forest fire occurred in Goseong and Sokcho, Korea and burned 1,757 hectares of forests. We visited the town in Goseong where suffered the most severe damage and conducted UAV flights for forest fire damage assessment. In this study, economic and rapid damage assessment method for forest fire has been proposed using UAV systems equipped with only a RGB sensor. First, forest masking was performed using automatic elevation thresholding to extract forest area. Then ExG (Excess Green) vegetation index which can be calculated without near-infrared band was adopted to extract damaged forests. In addition, entropy filtering was applied to ExG for better differentiation between damaged and non-damaged forest. We could confirm that the proposed forest masking can screen out non-forest land covers such as bare soil, agriculture lands, and artificial objects. In addition, entropy filtering enhanced the ExG homogeneity difference between damaged and non-damaged forests. The automatically detected damaged forests of the proposed method showed high accuracy of 87%.

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References

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