Izvorni znanstveni članak
https://doi.org/10.5552/crojfe.2023.2252
Measurement of Individual Tree Parameters with Carriage-Based Laser Scanning in Cable Yarding Operations
Christoph Gollob
; University of Natural Resources and Life Sciences, Vienna Department of Forest and Soil Sciences Institute of Forest Growth Peter Jordan Strasse 82 1190, Vienna AUSTRIA
Ralf Krassnitzer
; University of Natural Resources and Life Sciences, Vienna Department of Forest and Soil Sciences Institute of Forest Growth Peter Jordan Strasse 82 1190, Vienna AUSTRIA
Tim Ritter
; University of Natural Resources and Life Sciences, Vienna Department of Forest and Soil Sciences Institute of Forest Growth Peter Jordan Strasse 82 1190, Vienna AUSTRIA
Andreas Tockner
; University of Natural Resources and Life Sciences, Vienna Department of Forest and Soil Sciences Institute of Forest Growth Peter Jordan Strasse 82 1190, Vienna AUSTRIA
Gernot Erber
; University of Natural Resources and Life Sciences, Vienna Department of Forest and Soil Sciences Institute of Forest Engineering Peter Jordan Strasse 82 1190, Vienna AUSTRIA
Martin Kühmaier
; University of Natural Resources and Life Sciences, Vienna Department of Forest and Soil Sciences Institute of Forest Engineering Peter Jordan Strasse 82 1190, Vienna AUSTRIA
Ferdinand Hönigsberger
; University of Natural Resources and Life Sciences, Vienna Department of Forest and Soil Sciences Institute of Forest Engineering Peter Jordan Strasse 82 1190, Vienna AUSTRIA
Thomas Varch
; University of Natural Resources and Life Sciences, Vienna Department of Forest and Soil Sciences Institute of Forest Engineering Peter Jordan Strasse 82 1190, Vienna AUSTRIA
Andreas Holzinger
; University of Natural Resources and Life Sciences, Vienna Department of Forest and Soil Sciences Institute of Forest Engineering Peter Jordan Strasse 82 1190, Vienna AUSTRIA
Karl Stampfer
; University of Natural Resources and Life Sciences, Vienna Department of Forest and Soil Sciences Institute of Forest Engineering Peter Jordan Strasse 82 1190, Vienna AUSTRIA
Arne Nothdurft
; University of Natural Resources and Life Sciences, Vienna Department of Forest and Soil Sciences Institute of Forest Growth Peter Jordan Strasse 82 1190, Vienna AUSTRIA
Sažetak
Introduction: Cable yarding is a technology that enables efficient and sustainable use of timber resources in mountainous areas. Carriages as an integral component of cable yarding systems have undergone significant development in recent decades. In addition to mechanical and functional developments, carriages are increasingly used as carrier platforms for various sensors. The goal of this study was to assess the accuracy of individual standing tree and stand variable estimates obtained by a mobile laser scanning system mounted on a cable yarder carriage.
Methods: Eight cable corridors were scanned across two forest stands. Four different scan variants were conducted, differing in the movement speed of the carriage and the direction of movement during scanning. An algorithm for tree detection, diameter and height estimation was applied to the 3D datasets and evaluated against manual tree measurements.
Results: The analysis of the 3D scans showed that the individual tree parameters strongly depend on the scan variant and the distance of each individual tree to the skyline. This was due to changing 3D point densities and occlusion effects. It turned out that scan variant 1, in which the scan was performed during slow carriage movement downwards and back upwards again, was advantageous. At a distance of 10 m, which is half of the recommended corridor spacing of 20 m for whole tree cable yarding, 95.44% of the trees in stand 1 and 92.16% of the trees in stand 2 could be detected automatically. The corresponding root mean sqare errors of the diameter at breast height estimatimations were 1.59 cm and 2.23 cm, respectively. The root mean square errors of the height measurements were 2.94 m and 4.63 m.
Conclusions: The results of this study can help to further advance the digitization of cable yarding and timber flow from the standing tree to the sawmill. However, this requires further development steps in cable yarder, carriage, and laserscanner technology. Furthermore, there is also a need for more efficient software routines to take the next steps towards precision forestry.
Ključne riječi
Hrčak ID:
310155
URI
Datum izdavanja:
14.7.2023.
Posjeta: 164 *