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Applicability of Structure-from-Motion Photogrammetry on Forest Measurement in the Northern Ethiopian Highlands

Author

Listed:
  • Toru Sakai

    (Japan International Research Center for Agricultural Sciences, Ibaraki 3058686, Japan)

  • Emiru Birhane

    (Department of Land Resource Management and Environmental Protection, College of Dryland Agriculture and Natural Resources, Mekelle University, Mekelle 231, Ethiopia)

  • Buruh Abebe

    (Department of Land Resource Management and Environmental Protection, College of Dryland Agriculture and Natural Resources, Mekelle University, Mekelle 231, Ethiopia)

  • Destaalem Gebremeskel

    (Department of Land Resource Management and Environmental Protection, College of Dryland Agriculture and Natural Resources, Mekelle University, Mekelle 231, Ethiopia)

Abstract

Ethiopia is one of the countries with the most degraded forest resources. Information on tree structure is needed at some points in the process to assess the appropriateness of forest management. The objectives are to examine whether the Structure from Motion (SfM)-based photogrammetry can be used to derive the forest structural parameters, and how the tree structural parameters can vary by location. In this study, the possible applicability of low-cost SfM-based photogrammetry was evaluated for forest management and conservation purposes in the Adi Zaboy watershed of the Northern Ethiopian highlands. In the watershed, dwarf Acacia etbaica was sparsely distributed. Consequently, the full three-dimensional point clouds of the individual trees were generated, which provided a wide variety of tree structural parameters in a non-destructive manner. The R 2 values for tree height, canopy width, and stump diameter were 0.936, 0.891, and 0.808, respectively, and the corresponding RMSE values were 0.128 m, 0.331 m, and 0.886 cm. In addition, differences in forest structure and composition were caused by differences in the environment. The SfM-based photogrammetry would provide fundamental information to meet the demand of sustainable forest management from a morphological point of view, especially in forests of Ethiopian highlands.

Suggested Citation

  • Toru Sakai & Emiru Birhane & Buruh Abebe & Destaalem Gebremeskel, 2021. "Applicability of Structure-from-Motion Photogrammetry on Forest Measurement in the Northern Ethiopian Highlands," Sustainability, MDPI, vol. 13(9), pages 1-14, May.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:9:p:5282-:d:550961
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    References listed on IDEAS

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    1. Negasi Solomon & Hadgu Hishe & Ted Annang & Opoku Pabi & Isaac K Asante & Emiru Birhane, 2018. "Forest Cover Change, Key Drivers and Community Perception in Wujig Mahgo Waren Forest of Northern Ethiopia," Land, MDPI, vol. 7(1), pages 1-16, March.
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