Journal of Ecology and Environment

한국생태학회 (The Ecological Society of Korea)
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Calculating coniferous tree coverage using unmanned aerial vehicle photogrammetry

  • Ivosevic, Bojana (School of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University) ;
  • Han, Yong-Gu (School of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University) ;
  • Kwon, Ohseok (School of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University)
  • 투고 : 2016.11.28
  • 심사 : 2017.02.16
  • 발행 : 2017.03.31
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초록

Unmanned aerial vehicles (UAVs) are a new and yet constantly developing part of forest inventory studies and vegetation-monitoring fields. Covering large areas, their extensive usage has saved time and money for researchers and conservationists to survey vegetation for various data analyses. Post-processing imaging software has improved the effectiveness of UAVs further by providing 3D models for accurate visualization of the data. We focus on determining the coniferous tree coverage to show the current advantages and disadvantages of the orthorectified 2D and 3D models obtained from the image photogrammetry software, Pix4Dmapper Pro-Non-Commercial. We also examine the methodology used for mapping the study site, additionally investigating the spread of coniferous trees. The collected images were transformed into 2D black and white binary pixel images to calculate the coverage area of coniferous trees in the study site using MATLAB. The research was able to conclude that the 3D model was effective in perceiving the tree composition in the designated site, while the orthorectified 2D map is appropriate for the clear differentiation of coniferous and deciduous trees. In its conclusion, the paper will also be able to show how UAVs could be improved for future usability.

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