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On the utilization of novel spectral laser scanning for three-dimensional classification of vegetation elements

Zhan Li, Michael Schaefer, Alan Strahler, Crystal Schaaf, David Jupp
2018 Interface Focus  
The authors would like to thank the members of the Terrestrial Lidar Scanning Research Coordination Network (http:// for their valuable discussions on TLS studies, and the reviewers that  ...  MS, 0000-0001-6584-9521; AS, 0000-0002-0925-9866 The Dual-Wavelength Echidna Lidar (DWEL), a full waveform terrestrial laser scanner (TLS), has been used to scan a variety of forested and agricultural  ...  The focus of this paper is a full-waveform instrument, the Dual-Wavelength Echidna w Lidar (DWEL) [3, 4] .  ... 
doi:10.1098/rsfs.2017.0039 pmid:29503720 pmcid:PMC5829182 fatcat:4gasldtygrakpalrq2k7z2ivga

Hyperspectral lidar in non-destructive 4D monitoring of climate variables

S. Kaasalainen, T. Hakala, O. Nevalainen, E. Puttonen, K. Anttila
2014 The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
The results open up a prospect for four-dimensional (4D – a three dimensional target representation with time as a fourth dimension) monitoring of important climate variables, such as those related to  ...  The first applications of a prototype 8-channel full waveform active hyperspectral lidar (HSL) show a possibility to determine various target 3D characteristics with remote observations.  ...  The authors want to thank Raisa Mäkipää at the Finnish Forest Research Institute (METLA) for help in the reference measurements.  ... 
doi:10.5194/isprsarchives-xl-7-109-2014 fatcat:wb6d4bm37bbh5c6uvhjhy7dfp4

Radiometric Calibration of a Dual-Wavelength, Full-Waveform Terrestrial Lidar

Zhan Li, David Jupp, Alan Strahler, Crystal Schaaf, Glenn Howe, Kuravi Hewawasam, Ewan Douglas, Supriya Chakrabarti, Timothy Cook, Ian Paynter, Edward Saenz, Michael Schaefer
2016 Sensors  
Radiometric calibration of the Dual-Wavelength Echidna ® Lidar (DWEL), a full-waveform terrestrial laser scanner with two simultaneously-pulsing infrared lasers at 1064 nm and 1548 nm, provides accurate  ...  dual-wavelength apparent reflectance (ρ app ), a physically-defined value that is related to the radiative and structural characteristics of scanned targets and independent of range and instrument optics  ...  Echidna is a registered trademark of the Commonwealth Scientific and Industrial Research Organisation (CSIRO).  ... 
doi:10.3390/s16030313 pmid:26950126 pmcid:PMC4813888 fatcat:x32rcudvwrafhlko3dfgetxmcm

Terrestrial Laser Scanning for Plot-Scale Forest Measurement

Glenn J. Newnham, John D. Armston, Kim Calders, Mathias I. Disney, Jenny L. Lovell, Crystal B. Schaaf, Alan H. Strahler, F. Mark Danson
2015 Current Forestry Reports  
For TLS to reach its full potential, these instruments cannot be viewed as a logical progression of existing plot based measurement.  ...  The use of Terrestrial Laser Scanning (TLS) for plot scale measurement was first demonstrated over a decade ago, with the intimation that these instruments could replace manual measurement methods.  ...  Michael Schaefer for supplying the figure showing the Normalised Difference Index derived from the DWEL scanner data.  ... 
doi:10.1007/s40725-015-0025-5 fatcat:ly2cxqludjgw5krkg6n52jy4oi

The potential to characterize ecological data with terrestrial laser scanning in Harvard Forest, MA

D. A. Orwig, P. Boucher, I. Paynter, E. Saenz, Z. Li, C. Schaaf
2018 Interface Focus  
One such research instrument, the Dual-Wavelength Echidna Lidar (DWEL), has been deployed at several sites at the HF, including hardwood-dominated and hemlockdominated plots in the ForestGEO region.  ...  Forest structure measurements Over the past decade, ground-based Echidna lidar scans have been used to estimate mean DBH values of trees, stem density, basal area and woody biomass [18] , and effective  ... 
doi:10.1098/rsfs.2017.0044 pmid:29503723 pmcid:PMC5829185 fatcat:yrkrv73ejfbkndosom7s5wzfga

Vegetation Structure (LiDAR) [chapter]

M. van Leeuwen, M. Disney
2018 Comprehensive Remote Sensing  
The DWEL (Dual-Wavelength Echidna LiDAR) is a follow-up of the ECHIDNA instrument and features two laser sources operating at different wavelengths and is principally being developed by Boston University  ...  This information can be used, for example, to discriminate between ground-level, understory, and overstory reflectance which may be impossible based on either hyperspectral or LiDAR data alone (Koetz  ... 
doi:10.1016/b978-0-12-409548-9.10543-3 fatcat:2lfewqj4vze3jmt3xtkrjr4nxa

Technical Note: Multispectral lidar time series of pine canopy chlorophyll content

T. Hakala, O. Nevalainen, S. Kaasalainen, R. Mäkipää
2015 Biogeosciences  
</strong> We present an empirical application of multispectral laser scanning for monitoring the seasonal and spatial changes in pine chlorophyll (<i>a</i> + <i>b</i>) content and upscaling the accurate  ...  laboratory measurements of the chlorophyll <i>a</i> and <i>b</i> content.  ...  Edited by: A. MacArthur  ... 
doi:10.5194/bg-12-1629-2015 fatcat:q7al6eeu6nfqro6bu7knqajf74

Characterising forest gap fraction with terrestrial lidar and photography: An examination of relative limitations

Steven Hancock, Richard Essery, Tim Reid, Joël Carle, Robert Baxter, Nick Rutter, Brian Huntley
2014 Agricultural and Forest Meteorology  
This paper performs a detailed comparison of lidar to camera-derived gap fractions over a range of forest structures (in snow affected areas) and reasons for any disagreements are analysed.  ...  Characterising forest gap fraction with terrestrial lidar and photography : an examination of relative limitations.', Agricultural and forest meteorology., 189-190 . pp. 105-114.  ...  Acknowledgements This is part of a Natural Environment Research Council (NERC) funded project, grant number NE/H008187/1. S. Hancock was funded by the NERC National Centre for Earth Observation.  ... 
doi:10.1016/j.agrformet.2014.01.012 fatcat:lnb7bfekdjfsdhnnhjela53vhe


V. Wichmann, M. Bremer, J. Lindenberger, M. Rutzinger, C. Georges, F. Petrini-Monteferri
2015 ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
Recently multispectral LiDAR became a promising research field for enhanced LiDAR classification workflows and e.g. the assessment of vegetation health.  ...  Current analyses on multispectral LiDAR are mainly based on experimental setups, which are often limited transferable to operational tasks.  ...  Pirotti doi:10.5194/isprsannals-II-3-W5-113-2015 ACKNOWLEDGEMENTS The authors would like to thank Optech Inc. for providing the data from the Titan LiDAR system and in particular Michael Sitar for explanations  ... 
doi:10.5194/isprsannals-ii-3-w5-113-2015 fatcat:erjyf6dsfzaezjtoclyj5etb4a

A Density-Based Approach for Leaf Area Index Assessment in a Complex Forest Environment Using a Terrestrial Laser Scanner

Ali Rouzbeh Kargar, Richard MacKenzie, Gregory P. Asner, Jan van Aardt
2019 Remote Sensing  
The results bode well for using this method for efficient, automatic, and accurate/precise estimation of LAI values in complex forest environments, using a low-cost, rapid-scan TLS.  ...  reflectance for woody material at the 905 nm laser wavelength.  ...  [44] used the dual wavelength Echidna lidar (DWEL; [30] ), which collects data in two different wavelengths (1064 nm and 1548 nm), to measure the effective LAI.  ... 
doi:10.3390/rs11151791 fatcat:vjfer2lppjdtveq37yjha5k5gq

Data acquisition considerations for Terrestrial Laser Scanning of forest plots

Phil Wilkes, Alvaro Lau, Mathias Disney, Kim Calders, Andrew Burt, Jose Gonzalez de Tanago, Harm Bartholomeus, Benjamin Brede, Martin Herold
2017 Remote Sensing of Environment  
A B S T R A C T The poor constraint of forest Above Ground Biomass (AGB) is responsible, in part, for large uncertainties in modelling future climate scenarios.  ...  Terrestrial Laser Scanning (TLS) can be used to derive unbiased and nondestructive estimates of tree structure and volume and can, therefore, be used to address key uncertainties in forest AGB estimates  ...  (IKI) through CIFORs Global Comparative Study on REDD+, and the CGIAR Research Program on Forests, Trees and Agroforestry (CRP-FTA) with financial support from the CGIAR Fund.  ... 
doi:10.1016/j.rse.2017.04.030 fatcat:epfaz77cwrezrjkavekfaqvcsy

Estimating leaf area index from airborne laser scanning [article]

Grant Dennis Pearse, University Of Canterbury
Airborne laser scanning (ALS) data (lidar) offers enhanced ability to estimate LAI in a range of forest types with a high degree of accuracy, but the optimum methods for estimating LAI from lidar are not  ...  This thesis aims to develop and demonstrate a method for estimating LAI from lidar in New Zealand's intensively managed Pinus radiata D. Don forests.  ...  I would also like to thank Timberlands Ltd. for providing access to forest plots and associated data, as well as providing valuable staff time to assist with the preparations for data collection.  ... 
doi:10.26021/2356 fatcat:5sorbryi3jfahgdr6wm6gnojli

Vegetation spectroscopy

Lola Suarez, Natalia Restrepo-Coupe, Andreas Hueni, Laurie Chisholm
Moreover, for the comprehensive use of the data in future studies, it is very important to document the measurement protocol and a proper collection of measurement auxiliary data.  ...  This chapter compiles some basic theory about photon-vegetation interaction and some guidelines for field spectroscopy measurement.  ...  QA 4 LiDAR returns a standard compliance and QA report, as well as supporting information to the user. This report will provide transparency to the user on the quality of the LiDAR data.  ... 
doi:10.5167/uzh-113211 fatcat:gqg2xsqnxrdenltllsyfwdwvx4

The spectroscopy dataset lifecycle: best practice for exchange and dissemination

Laurie Chisholm, Andreas Hueni
The newly enhanced AUS-SPECCHIO spectral information system is presented within the context of a spectroscopy data lifecycle model for remote and proximal sensing activities, through a common set of lifecycle  ...  When data is created, published, exported, imported, transformed and shared by different parties and used for different purposes, these actions form a data lifecycle.  ...  QA 4 LiDAR returns a standard compliance and QA report, as well as supporting information to the user. This report will provide transparency to the user on the quality of the LiDAR data.  ... 
doi:10.5167/uzh-113209 fatcat:wggoexb5dvb2db62zenlaznnza