Comparison of wood volume estimates of young trees from terrestrial laser scan data
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In: iForest - Biogeosciences and Forestry, Vol. 10, No. 2, 30.04.2017, p. 451-458.
Research output: Journal contributions › Journal articles › Research › peer-review
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TY - JOUR
T1 - Comparison of wood volume estimates of young trees from terrestrial laser scan data
AU - Kunz, Matthias
AU - Hess, Carsten
AU - Raumonen, Pasi
AU - Bienert, Anne
AU - Hackenberg, Jan
AU - Maas, Hans-Gerd
AU - Härdtle, Werner
AU - Fichtner, Andreas
AU - von Oheimb, Goddert
N1 - Publisher Copyright: © SISEF.
PY - 2017/4/30
Y1 - 2017/4/30
N2 - Many analyses in ecology and forestry require wood volume estimates of trees. However, non-destructive measurements are not straightforward because trees are differing in their three-dimensional structures and shapes. In this paper we compared three methods (one voxel-based and two cylinder-based methods) for wood volume calculation of trees from point clouds obtained by terrestrial laser scanning. We analysed a total of 24 young trees, composed of four different species ranging between 1.79 m to 7.96 m in height, comparing the derived volume estimates from the point clouds with xylometric reference volumes for each tree. We found that both voxel- and cylinder-based approaches are able to compute wood volumes with an average accuracy above 90% when compared to reference volumes. The best results were achieved with the voxel-based method (r2 = 0.98). Cylinder-model based methods (r2 = 0.90 and 0.92 respectively) did perform slightly less well but offer valuable additional opportunities to analyse structural parameters for each tree. We found that the error of volume estimates from point clouds are strongly species-specific. Therefore, species-specific parameter sets for point-cloud based wood volume estimation methods are required for more robust estimates across a number of tree species.
AB - Many analyses in ecology and forestry require wood volume estimates of trees. However, non-destructive measurements are not straightforward because trees are differing in their three-dimensional structures and shapes. In this paper we compared three methods (one voxel-based and two cylinder-based methods) for wood volume calculation of trees from point clouds obtained by terrestrial laser scanning. We analysed a total of 24 young trees, composed of four different species ranging between 1.79 m to 7.96 m in height, comparing the derived volume estimates from the point clouds with xylometric reference volumes for each tree. We found that both voxel- and cylinder-based approaches are able to compute wood volumes with an average accuracy above 90% when compared to reference volumes. The best results were achieved with the voxel-based method (r2 = 0.98). Cylinder-model based methods (r2 = 0.90 and 0.92 respectively) did perform slightly less well but offer valuable additional opportunities to analyse structural parameters for each tree. We found that the error of volume estimates from point clouds are strongly species-specific. Therefore, species-specific parameter sets for point-cloud based wood volume estimation methods are required for more robust estimates across a number of tree species.
KW - Ecosystems Research
KW - Mixed Forests
KW - Quantitative Structure Models
KW - Voxel-based
KW - Xylometry
UR - http://www.scopus.com/inward/record.url?scp=85019560771&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/b4dc9a49-56ab-34d9-adf4-cbea1d767132/
U2 - 10.3832/ifor2151-010
DO - 10.3832/ifor2151-010
M3 - Journal articles
VL - 10
SP - 451
EP - 458
JO - iForest - Biogeosciences and Forestry
JF - iForest - Biogeosciences and Forestry
SN - 1971-7458
IS - 2
ER -