Floresta e Ambiente
https://floram.org/article/doi/10.1590/2179-8087.012516
Floresta e Ambiente
Original Article Forest Management

Stem Modelling of Eucalyptus by Terrestrial Laser Scanning

André Leonardo Bortolotto Buck; Christel Lingnau; Sylvio Péllico Neto; Álvaro Muriel Lima Machado; Rorai Pereira Martins-Neto

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Abstract

ABSTRACT: The objective of this work was to obtain the stem volume from 3D-cloud points generated by terrestrial laser scanning in Eucalyptus stands. The processing started with using algorithms for tree detection in plantation (TDP) and stem filtering (Filter Dmax). Then, the acquisition of the total height was made semi-automatically and tridimensional modelling was performed through the adjustment of circumferences (AC) and the so-called triangulated irregular network (TIN). The results were compared with field data and conventional stem volume measurements. The detection accuracy was 100% for the trees in the plots while filtering reached 70% of the stem surface. The total height presented R2 = 0.98 and residuals less than 5%. The estimated volumes, analyzed in sections with a length of 2 m, were in average smaller than that obtained by the conventional Smalian method. The occlusion of points in the tree crown precluded obtaining the total stem volume.

Keywords

point cloud, three-dimensional modelling, stem volume

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