Assessing different components of three-dimensional forest structure with single-scan terrestrial laser scanning: A case study

Seidel, Dominik; Ehbrecht, Martin; Puettmann, Klaus J.

doi:10.1016/j.foreco.2016.09.036

Cited by 37 publications

(23 citation statements)

References 82 publications

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“…1a; Whittaker 1970). These vegetation structural types can be viewed as an agglomeration of canopy traits describing the arrangement of vegetation elements in canopy space and generally relate to three primary components of variation: canopy height, vertical layering and horizontal openness/patchiness (Aber et al 1982;Brokaw & Lent 1999;Ehbrecht et al 2016;Paynter et al 2018;Cushman & Kellner 2019), as well as higher-order metrics that combine or describe variation in these traits to characterise the arrangement of canopy elements in two-dimensional (2D) or 3D space (Hardiman et al 2011;Chen et al 2012;Seidel et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Defining a spectrum of integrative trait‐based vegetation canopy structural types

et al. 2019

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Vegetation canopy structure is a fundamental characteristic of terrestrial ecosystems that defines vegetation types and drives ecosystem functioning. We use the multivariate structural trait composition of vegetation canopies to classify ecosystems within a global canopy structure spectrum. Across the temperate forest sub‐set of this spectrum, we assess gradients in canopy structural traits, characterise canopy structural types (CST) and evaluate drivers and functional consequences of canopy structural variation. We derive CSTs from multivariate canopy structure data, illustrating variation along three primary structural axes and resolution into six largely distinct and functionally relevant CSTs. Our results illustrate that within‐ecosystem successional processes and disturbance legacies can produce variation in canopy structure similar to that associated with sub‐continental variation in forest types and eco‐climatic zones. The potential to classify ecosystems into CSTs based on suites of structural traits represents an important advance in understanding and modelling structure–function relationships in vegetated ecosystems.

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Section: Introductionmentioning

confidence: 99%

Defining a spectrum of integrative trait‐based vegetation canopy structural types

et al. 2019

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“…Forest structure, consisting of the distribution and characteristics of trees, branches, understory, and canopy gaps, has a positive link to various ecosystem functions [1,2]. A management regime that considers these functions therefore needs information about forest structure for quality decision making.…”

Section: Introductionmentioning

confidence: 99%

UAV Photogrammetry of Forests as a Vulnerable Process. A Sensitivity Analysis for a Structure from Motion RGB-Image Pipeline

et al. 2018

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Structural analysis of forests by UAV is currently growing in popularity. Given the reduction in platform costs, and the number of algorithms available to analyze data output, the number of applications has grown rapidly. Forest structures are not only linked to economic value in forestry, but also to biodiversity and vulnerability issues. LiDAR remains the most promising technique for forest structural assessment, but small LiDAR sensors suitable for UAV applications are expensive and are limited to a few manufactures. The estimation of 3D-structures from two-dimensional image sequences called 'Structure from motion' (SfM) overcomes this limitation by photogrammetrically reconstructing point clouds similar to those rendered from LiDAR sensors. The result of these techniques in highly structured terrain strongly depends on the methods employed during image acquisition, therefore structural indices might be vulnerable to misspecifications in flight campaigns. In this paper, we outline how image overlap and ground sampling distances affect image reconstruction completeness in 2D and 3D. Higher image overlaps and coarser GSDs have a clearly positive influence on reconstruction quality. Therefore, higher accuracy requirements in the GSD must be compensated by a higher image overlap. The best results are achieved with an image overlap of > 95% and a resolution of > 5 cm. The most important environmental factors have been found to be wind and terrain elevation, which could be an indicator of vegetation density.

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“…Another widely used procedure for obtaining three-dimensional models of real objects, i.e. lidar scanning, was considered in [8,9]. Such scanning makes it possible to obtain clouds of points that describe three-dimensional objects spatially and provide with information on their surface characteristics.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…In order to apply expressions (7), (9) in constructing a line model in three-dimensional space, represent the PTL as a piecewise linear function. Superpose direction of each segment with the x-axis (Fig.…”

Section: Mathematical Model Of a Wire Linementioning

confidence: 99%

Development of a method for the synthesis of a threedimensional model of power transmission lines for visualization systems of training complexes

Kachanov

Зуев

2018

EEJET

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In this case, the use of UAVs, especially in automatic mode, requires careful study of routes and flight tasks. As a result, requirements to quality of their management grow which requires grading up the qualitative level of operators training. Training of operators and working out of flight tasks with a direct operation of UAVs on power lines is expensive and not always possible. In this case, activity of undertrained operators can lead both to the UAV failures because of accidents and, accordingly, to expensive repairs and the consequences posing a threat to people's lives. Thus, it is advisable to use simulation and training complexes (STC) which use computer synthesis of environment in the process of training and modeling. Such complexes lack disadvantages of conventional training methods, have a low cost of both the complex itself and its operation, are safe for people and enable simulation of any situations that arise during operation of a UAV in the monitoring process.

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Assessing different components of three-dimensional forest structure with single-scan terrestrial laser scanning: A case study

Cited by 37 publications

References 82 publications

Defining a spectrum of integrative trait‐based vegetation canopy structural types

Defining a spectrum of integrative trait‐based vegetation canopy structural types

UAV Photogrammetry of Forests as a Vulnerable Process. A Sensitivity Analysis for a Structure from Motion RGB-Image Pipeline

Development of a method for the synthesis of a threedimensional model of power transmission lines for visualization systems of training complexes

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Assessing different components of three-dimensional forest structure with single-scan terrestrial laser scanning: A case study

Cited by 37 publications

References 82 publications

Defining a spectrum of integrative trait‐based vegetation canopy structural types

Defining a spectrum of integrative trait‐based vegetation canopy structural types

UAV Photogrammetry of Forests as a Vulnerable Process. A Sensitivity Analysis for a Structure from Motion RGB-Image Pipeline

Development of a method for the synthesis of a three­dimensional model of power transmission lines for visualization systems of training complexes

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Development of a method for the synthesis of a threedimensional model of power transmission lines for visualization systems of training complexes