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Open AccessArticle

Comparing Terrestrial Laser Scanning (TLS) and Wearable Laser Scanning (WLS) for Individual Tree Modeling at Plot Level

1
Department of Mining Exploitation and Prospecting, Polytechnic School of Mieres, University of Oviedo, Campus de Mieres, C/Gonzalo Gutiérrez Quirós s/n, Mieres 33600, Spain
2
Department of Cartographic and Land Engineering, Higher Polytechnic School of Ávila, University of Salamanca, Ávila 05003, Spain
3
Department of Mining Technology, Topography and Structures, Universidad de León, Avda. Astorga s/n, Ponferrada, León 24401, Spain
*
Author to whom correspondence should be addressed.
Remote Sens. 2018, 10(4), 540; https://doi.org/10.3390/rs10040540
Received: 3 March 2018 / Revised: 25 March 2018 / Accepted: 29 March 2018 / Published: 1 April 2018
(This article belongs to the Special Issue Mobile Laser Scanning)
This study presents a comparison between the use of wearable laser scanning (WLS) and terrestrial laser scanning (TLS) devices for automatic tree detection with an estimation of two dendrometric variables: diameter at breast height (DBH) and total tree height (TH). Operative processes for data collection and automatic forest inventory are described in detail. The approach used is based on the clustering of points belonging to each individual tree, the isolation of the trunks, the iterative fitting of circles for the DBH calculation and the computation of the TH of each tree. TLS and WLS point clouds were compared by the statistical analysis of both estimated forest dendrometric parameters and the possible presence of bias. Results show that the apparent differences in point density and relative precision between both 3D forest models do not affect tree detection and DBH estimation. Nevertheless, tree height estimation using WLS appears to be affected by the limited scanning range of the WLS used in this study. TH estimations for trees below a certain height are equivalent using WLS or TLS, whereas TH of taller trees is clearly underestimated using WLS. View Full-Text
Keywords: forest inventory; tree modeling; laser scanning; backpack; handheld; mobile mapping; dendrometric variables forest inventory; tree modeling; laser scanning; backpack; handheld; mobile mapping; dendrometric variables
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MDPI and ACS Style

Cabo, C.; Del Pozo, S.; Rodríguez-Gonzálvez, P.; Ordóñez, C.; González-Aguilera, D. Comparing Terrestrial Laser Scanning (TLS) and Wearable Laser Scanning (WLS) for Individual Tree Modeling at Plot Level. Remote Sens. 2018, 10, 540.

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