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An assessment of the repeatability of automatic forest inventory metrics derived from UAV-borne laser scanning data

journal contribution
posted on 2023-05-18, 02:01 authored by Luke WallaceLuke Wallace, Musk, R, Arko LucieerArko Lucieer
We assessed the reproducibility of forest inventory metrics derived from an unmanned aerial vehicle (UAV) laser scanning (UAVLS) system. A total of 82 merged point clouds were captured over six 500-m2 plots within a Eucalyptus globulus plantation forest in Tasmania, Australia. Terrain and understory height, together with plot- and tree-level metrics, were extracted from the UAVLS point clouds using automated methods and compared across the multiple point clouds. The results show that measurements of terrain and understory height and plot-level metrics can be reproduced with adequate repeatability for change detection purposes. At the tree level, the high-density data collected by the UAV provided estimates of tree location (mean deviation (MD) of less than 0.48 m) and tree height (MD of 0.35 m) with high precision. This precision is comparable to that of ground-based field measurement techniques. The estimates of crown area and crown volume were found to be dependent on the segmentation routine and, as such, were measured with lower repeatability. The precision of the metrics found within this paper demonstrates the applicability of UAVs as a platform for performing sample-based forest inventories.

Funding

Winifred Violet Scott Charitable Trust

History

Publication title

IEEE Transactions on Geoscience and Remote Sensing

Volume

52

Issue

11

Pagination

7160-7169

ISSN

0196-2892

Department/School

School of Geography, Planning and Spatial Sciences

Publisher

Ieee-Inst Electrical Electronics Engineers Inc

Place of publication

445 Hoes Lane, Piscataway, USA, Nj, 08855

Rights statement

Copyright 2014 IEEE

Repository Status

  • Restricted

Socio-economic Objectives

Assessment and management of freshwater ecosystems

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    University Of Tasmania

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