NDLI: Preliminary leaf area index estimates from airborne small footprint full-waveform LiDAR data

Content Provider	IEEE Xplore Digital Library
Author	Fieber, K.D. Davenport, I.J. Tanase, M.A. Ferryman, J.M. Gurney, R.J. Walker, J.P. Hacker, J.M.
Copyright Year	2013
Description	Author affiliation: Sch. of the Environ., Flinders Univ., Adelaide, SA, Australia (Hacker, J.M.) \|\| Sch. of Syst. Eng., Univ. of Reading, Reading, UK (Fieber, K.D.; Ferryman, J.M.) \|\| Univ. of Melbourne, Melbourne, VIC, Australia (Tanase, M.A.) \|\| Sch. of Math. & Phys. Sci., Univ. of Reading, Reading, UK (Davenport, I.J.; Gurney, R.J.) \|\| Dept. of Civil Eng., Monash Univ., Melbourne, VIC, Australia (Walker, J.P.)
Abstract	This study has compared preliminary estimates of effective leaf area index (LAI) derived from fish-eye lens photographs to those estimated from airborne full-waveform small-footprint LiDAR data for a forest dataset in Australia. The full-waveform data was decomposed and optimized using a trust-region-reflective algorithm to extract denser point clouds. LAI LiDAR estimates were derived in two ways (1) from the probability of discrete pulses reaching the ground without being intercepted (point method) and (2) from raw waveform canopy height profile processing adapted to small-footprint laser altimetry (waveform method) accounting for reflectance ratio between vegetation and ground. The best results, that matched hemispherical photography estimates, were achieved for the waveform method with a study area-adjusted reflectance ratio of 0.4 (RMSE of 0.15 and 0.03 at plot and site level, respectively). The point method generally overestimated, whereas the waveform method with an arbitrary reflectance ratio of 0.5 underestimated the fish-eye lens LAI estimates.
Sponsorship	IEEE Geosci. Remote Sens. Soc.
Starting Page	3379
Ending Page	3382
File Size	447947
Page Count	4
File Format	PDF
ISBN	9781479911141
ISSN	21536996
DOI	10.1109/IGARSS.2013.6723553
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-07-21
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Laser radar Abstracts Lenses Indexes Lasers Small-footprint Full-waveform LiDAR Leaf area index (LAI) Canopy height profile
Content Type	Text
Resource Type	Article

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