This paper presents a new method for individual tree measurement from Airborne LiDAR data. This method involves 3 steps; 1) individual tree crown delineation based on density of high points (DHP), 2) tree filtering, and 3) measurement of tree trunk diameter at breast height (DBH). In the second step, a special tree filtering algorithm is introduced which combines a histogram analysis and region...

A method of estimating forest-fire fuel loads was developed using drones to collect information about the height and diameter-at-breast-height (DBH) individual trees. It conducted for forest fire prevention monitoring (Control, 20% thinned, 40% thinned area) located in Goseong-gun, Gangwon-do. Object-based images 3D-model red/green/blue band characteristics were superimposed select extract digi...

Images acquired with a commercially available digital camera were used to make measurements on 20 red oak (Quercus spp.) stems. The ranges of diameter at breast height (DBH) and height to a 10 cm upper-stem diameter were 16–66 cm and 12–20 m, respectively. Camera stations located 3, 6, 9, 12, and 15 m from the stem were studied to determine the best distance to be used with the maximum wide ang...

The diameter at breast height (DBH) of trees and stands is not only a widely used plant functional trait in ecology biodiversity but also one the most fundamental measurements managing forests. However, systematically measuring DBH individual over large areas using conventional ground-based approaches labour-intensive costly. Here, we present an improved area-based approach to estimate plot-lev...

Inventory on Plantation Monitoring Assessment (PMA) Eucalyptus pellita at the aged of 30 months, measuring total height (h) and diameter breast (dbh). Height measurements were done using Vertex. Measuring a tree whose crown has started to close (overlap) requires more time find highest point tree, it is necessary overcome with tool that estimator model through relationship between (h-dbh). The ...

Remote-sensing (RS) methods, such as airborne laser scanning (ALS), are capable of acquiring tree-level forest information with high accuracy. However, these methods need more detailed reference data from sample plots than standwise mean characteristics. Field-measured treewise characteristics must be matched with ALS data on the measured position of the tree. In addition to tree position and s...

Diameter at breast height (DBH) is the main metric for standing tree growth measurements. Developing fast and efficient measurement devices measuring DBH of great values in forest resource surveys. In this paper, we propose a new diameter instrument developed using self-reset displacement sensor, which equipped with Personal Computer (PC) terminal to enable measurement, transmission, storage, a...

This study aimed to evaluate the influence of anatomy on mechanical resistance Parapiptadenia rigida (Benth.) Brenan, Peltophorum dubium (Spreng.) Taub., Eucalyptus grandis × urophylla, and Schizolobium parahyba (Vell.) Blake from an agroforestry system. For this purpose, twelve 9-year-old trees were felled. To anatomical properties, specimens taken diameter region at breast height (DBH 1.30 m ...