scholarly journals Tree Root System Characterization and Volume Estimation by Terrestrial Laser Scanning and Quantitative Structure Modeling

Forests ◽  
2014 ◽  
Vol 5 (12) ◽  
pp. 3274-3294 ◽  
Author(s):  
Aaron Smith ◽  
Rasmus Astrup ◽  
Pasi Raumonen ◽  
Jari Liski ◽  
Anssi Krooks ◽  
...  
Keyword(s):  
Root System ◽  
Laser Scanning ◽  
Terrestrial Laser Scanning ◽  
Volume Estimation ◽  
Structure Modeling ◽  
Quantitative Structure ◽  
Tree Root System ◽  
System Characterization

scholarly journals Tree structure vs. height from terrestrial laser scanning and quantitative structure models

Silva Fennica ◽  
2014 ◽  
Vol 48 (2) ◽  
Author(s):  
Anssi Krooks ◽  
Sanna Kaasalainen ◽  
Ville Kankare ◽  
Marianna Joensuu ◽  
Pasi Raumonen ◽  
...  
Keyword(s):  
Laser Scanning ◽  
Terrestrial Laser Scanning ◽  
Tree Structure ◽  
Quantitative Structure

scholarly journals Non-destructive tree volume estimation through quantitative structure modelling: Comparing UAV laser scanning with terrestrial LIDAR

2019 ◽  
Vol 233 ◽  
pp. 111355 ◽  
Author(s):  
Benjamin Brede ◽  
Kim Calders ◽  
Alvaro Lau ◽  
Pasi Raumonen ◽  
Harm M. Bartholomeus ◽  
...  
Keyword(s):  
Laser Scanning ◽  
Volume Estimation ◽  
Quantitative Structure ◽  
Terrestrial Lidar ◽  
Non Destructive

scholarly journals Change Detection of Tree Biomass with Terrestrial Laser Scanning and Quantitative Structure Modelling

2014 ◽  
Vol 6 (5) ◽  
pp. 3906-3922 ◽  
Author(s):  
Sanna Kaasalainen ◽  
Anssi Krooks ◽  
Jari Liski ◽  
Pasi Raumonen ◽  
Harri Kaartinen ◽  
...  
Keyword(s):  
Change Detection ◽  
Laser Scanning ◽  
Terrestrial Laser Scanning ◽  
Quantitative Structure ◽  
Tree Biomass

scholarly journals Applying quantitative structure models to plot-based terrestrial laser data to assess dendrometric parameters in dense mixed forests

2018 ◽  
Vol 27 (1) ◽  
pp. e004 ◽  
Author(s):  
Chiara Torresan ◽  
Ugo Chiavetta ◽  
Jan Hackenberg
Keyword(s):  
Forest Inventory ◽  
Laser Scanning ◽  
Tree Height ◽  
Buffer Zone ◽  
National Forest Inventory ◽  
Volume Estimation ◽  
Quantitative Structure ◽  
Inventory Data ◽  
Forest Inventory Data ◽  
Laser Data

Aim of study: To assess terrestrial laser scanning (TLS) accuracy in estimating biometrical forest parameters at plot-based level in order to replace manual survey for forest inventory purposes.Area of study: Monte Morello, Tuscany region, ItalyMaterial and methods: In 14 plots (10 m radius) in dense Mediterranean mixed conifer forests, diameter at breast height (DBH) and height were measured in Summer 2016. Tree volume was computed using the second Italian National Forest Inventory (INFC II) equations. TLS data were acquired in the same plots and quantitative structure models (QSMs) were applied to TLS data to compute dendrometric parameters. Tree parameters measured in field survey, i.e. DBH, height, and computed volume, were compared to those resulting from TLS data processing. The effect of distance from the plot boundary in the accuracy of DBH, height and volume estimation from TLS data was tested.Main results: TLS-derived DBH showed a good correlation with the traditional forest inventory data (R2=0.98, RRMSE=7.81%), while tree height was less correlated with the traditional forest inventory data (R2=0.60, RRMSE=16.99%). Poor agreement was observed when comparing the volume from TLS data with volume estimated from the INFC II prediction equations.Research highlights: The study demonstrated that the application of QSM to plot-based terrestrial laser data generates errors in plots with high density of coniferous trees. A buffer zone of 5 m would help reduce the error of 35% and 42% respectively in height estimation for all trees and in volume estimation for broadleaved trees.

Analysis of stand density effects on the stem form of Norway spruce trees and volume miscalculation by traditional form factor equations using terrestrial laser scanning (TLS)

2020 ◽  
Vol 50 (1) ◽  
pp. 51-64 ◽  
Author(s):  
Martin Jacobs ◽  
Andreas Rais ◽  
Hans Pretzsch
Keyword(s):  
Form Factor ◽  
Norway Spruce ◽  
Laser Scanning ◽  
Terrestrial Laser Scanning ◽  
Volume Estimation ◽  
Tree Level ◽  
Stem Volume ◽  
Stem Form ◽  
Stem Wood ◽  
Volume Estimates

Tree and stand volume estimates are relevant for forest inventories, forest sales, and carbon stock evaluations. Forest practice commonly uses generalized stem-wood volume functions; however, such generalized approaches neglect the stem form in detail. Hence, trees of a given species with the same diameter at breast height (d1.3) and height (h) are always assumed to have the same form factor and thus the same volume. This case study focused on stem form variation of Norway spruce (Picea abies (L.) Karst.) due to competition effects. Using terrestrial laser scanning (TLS), we measured the stem shape of 868 trees from a long-term spacing and thinning experiment in Germany. The plots covered a broad density range. We analysed the effect of competition and compared the TLS-determined stem volume estimates with those determined conventionally. TLS-based volume estimations showed that the lower the competition was, the lower the tree volume was with a given d1.3 and h. Commonly used functions underestimated the volume stock overall by 4.2%, disregarding any levels. At plot level, underestimation varied from 0.7% to 7.0%. At tree level, the volume was under- and over-estimated by −10% to +10%, respectively. The more precise the examination was, the more suitable the application of TLS was for enhancing volume estimation.

scholarly journals Melite Civitas Romana in 3D: Virtualization Project of the Archaeological Park and Museum of the Domus Romana of Rabat, Malta

2021 ◽  
Vol 7 (1) ◽  
pp. 51-83
Author(s):  
Davide Tanasi ◽  
Stephan Hassam ◽  
Kaitlyn Kingsland ◽  
Paolo Trapani ◽  
Matthew King ◽  
...  
Keyword(s):  
Laser Scanning ◽  
Structured Light ◽  
Terrestrial Laser Scanning ◽  
Archaeological Site ◽  
South Florida ◽  
Virtual Museum ◽  
Current State ◽  
Structured Light Scanning ◽  
The University ◽  
Archaeological Excavations

Abstract The archaeological site of the Domus Romana in Rabat, Malta was excavated almost 100 years ago yielding artefacts from the various phases of the site. The Melite Civitas Romana project was designed to investigate the domus, which may have been the home of a Roman Senator, and its many phases of use. Pending planned archaeological excavations designed to investigate the various phases of the site, a team from the Institute for Digital Exploration from the University of South Florida carried out a digitization campaign in the summer of 2019 using terrestrial laser scanning and aerial digital photogrammetry to document the current state of the site to provide a baseline of documentation and plan the coming excavations. In parallel, structured light scanning and photogrammetry were used to digitize 128 artefacts in the museum of the Domus Romana to aid in off-site research and create a virtual museum platform for global dissemination.

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