In this paper, we propose an approach that enables automatic, fast and accurate tree trunks segmentation from three-dimensional (3-D) laser data. Results have been demonstrated in real-time on-board a ground mobile robot. In addition, we propose an approach to estimate tree diameter at breast height (dbh) that was tested off-line on a variety of ground laser scanner data. Results are also prese...

Research Highlights: This study advances the effort to accurately estimate biomass of trees in peatlands, which cover 13% Canada’s land surface. Background and Objectives: Trees remove carbon from atmosphere store it as biomass. Terrestrial laser scanning (TLS) has become a useful tool for modelling forest structure estimating above ground (AGB) trees. Allometric equations are often used indivi...

Individual tree detection (ITD) based forest inventory using the airborne laser scanning (ALS) data suffers from under-estimation problem, which arises mainly from the suppressed trees that are difficult to be detected from the air. Uncertainty of tree-level estimates, like tree height, diameter at breast height (DBH) and the modeled stem volume also contributes to the inaccuracy of the plot-le...

Mangroves are recognised for their diverse set of ecosystem services, including protection from tropical cyclones and tidal surges. also adapted to withstand disturbances across a range climatic conditions, the frequency severity projected increase in coming years due climate change sea-level rise. The Sundarbans Bangladesh India is one most frequently affected mangrove forests South Asia. We i...

Woodlands provide valuable ecosystem services, and it is important to understand their dynamics. To predict the way in which these might change, we need process-based predictive ecological models, but these are necessarily very data intensive. We tested the ability of existing datasets to provide the parameters necessary to instantiate a well-used forest model (SORTIE) for a well-studied woodla...

This paper presents an analysis of the radial growth, tree dimensions, and allometry three phenological pedunculate oak (Quercus robur L.; QURO) varieties (early (E-QURO), typical (T-QURO), late (L-QURO)), from a common garden experiment. We focused on resistance resilience each variety to drought events, which occurred in 2012 2017, as well their recovery potential during juvenile mature growt...

11 12 The objective of this study was to assess the utility of hyperspectral data in 13 estimating and mapping forest structural parameters including mean diameter-at14 breast-height (DBH), mean tree height and tree density of a closed canopy beech 15 forest (Fagus sylvatica L). Airborne HyMap images and data on forest structural 16 attributes were collected from the Majella National Park, Ital...

Continuous planting is the primary method for managing Eucalyptus plantations. The “space-replacing time” approach assesses growth parameters of trees in China across generations, including height, diameter at breast height (DBH), slenderness ratio, trunk oblateness, and longitudinal strain. findings reveal: (1) significant variations strain occur among with average increasing noticeably; (2) g...

Spotted gum (Corymbia citriodora subspecies Variegata) has the potential to be the major hardwood species for large-scale plantations in South East Queensland, Australia, but production research is limited due to the lack of age of research plots. Optimal spacing is a major subject of concern. Based on time series data from a spotted gum experiment site, growth performance is analysed for five ...