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Open AccessArticle

Examining Changes in Stem Taper and Volume Growth with Two-Date 3D Point Clouds

1
Department of Forest Sciences, University of Helsinki, FI-00014 Helsinki, Finland
2
Centre of Excellence in Laser Scanning Research, Finnish Geospatial Research Institute, P.O. Box-15, FI-02431 Masala, Finland
3
School of Forest Sciences, University of Eastern Finland, P.O. Box-111, FI-80101 Joensuu, Finland
4
Department of Geographical and Historical Studies, University of Eastern Finland, P.O. Box-111, FI-80101 Joensuu, Finland
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Department of Remote Sensing and Photogrammetry, Finnish Geospatial Research Institute, P.O. Box-15, FI-02431 Masala, Finland
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Department of Geography and Geology, University of Turku, FI-20014 Turun Yliopisto, Finland
*
Author to whom correspondence should be addressed.
Forests 2019, 10(5), 382; https://doi.org/10.3390/f10050382
Received: 20 February 2019 / Revised: 10 April 2019 / Accepted: 26 April 2019 / Published: 30 April 2019
Exact knowledge over tree growth is valuable information for decision makers when considering the purposes of sustainable forest management and planning or optimizing the use of timber, for example. Terrestrial laser scanning (TLS) can be used for measuring tree and forest attributes in very high detail. The study aims at characterizing changes in individual tree attributes (e.g., stem volume growth and taper) during a nine year-long study period in boreal forest conditions. TLS-based three-dimensional (3D) point cloud data were used for identifying and quantifying these changes. The results showed that observing changes in stem volume was possible from TLS point cloud data collected at two different time points. The average volume growth of sample trees was 0.226 m3 during the study period, and the mean relative change in stem volume was 65.0%. In addition, the results of a pairwise Student’s t-test gave strong support (p-value 0.0001) that the used method was able to detect tree growth within the nine-year period between 2008–2017. The findings of this study allow the further development of enhanced methods for TLS-based single tree and forest growth modeling and estimation, which can thus improve the accuracy of forest inventories and offer better tools for future decision-making processes. View Full-Text
Keywords: tree stem volume; tree growth; terrestrial laser scanning; ground-based LiDAR; forest inventory; stem taper tree stem volume; tree growth; terrestrial laser scanning; ground-based LiDAR; forest inventory; stem taper
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MDPI and ACS Style

Luoma, V.; Saarinen, N.; Kankare, V.; Tanhuanpää, T.; Kaartinen, H.; Kukko, A.; Holopainen, M.; Hyyppä, J.; Vastaranta, M. Examining Changes in Stem Taper and Volume Growth with Two-Date 3D Point Clouds. Forests 2019, 10, 382. https://doi.org/10.3390/f10050382

AMA Style

Luoma V, Saarinen N, Kankare V, Tanhuanpää T, Kaartinen H, Kukko A, Holopainen M, Hyyppä J, Vastaranta M. Examining Changes in Stem Taper and Volume Growth with Two-Date 3D Point Clouds. Forests. 2019; 10(5):382. https://doi.org/10.3390/f10050382

Chicago/Turabian Style

Luoma, Ville; Saarinen, Ninni; Kankare, Ville; Tanhuanpää, Topi; Kaartinen, Harri; Kukko, Antero; Holopainen, Markus; Hyyppä, Juha; Vastaranta, Mikko. 2019. "Examining Changes in Stem Taper and Volume Growth with Two-Date 3D Point Clouds" Forests 10, no. 5: 382. https://doi.org/10.3390/f10050382

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