Evidence map›Paper›PMID 36081834›Full record

ArticleSurveys in geophysics2019

Quantifying Vegetation Biophysical Variables from Imaging Spectroscopy Data: A Review on Retrieval Methods.

Jochem Verrelst, Zbyněk Malenovský, Christiaan Van der Tol, Gustau Camps-Valls, Jean-Philippe Gastellu-Etchegorry, Philip Lewis, Peter North, Jose Moreno

Open access · bronzeAbstract read
In one paragraph

Article in Surveys in geophysics, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 78 papers.

0numbers the graph read from it
0cells of the map it votes in
78citing papers in PubMed
27.2field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

78 citing papers in PubMed, 475 citations in OpenAlex.

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18 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 6 institutions in 7 countries.

Jochem VerrelstImage Processing Laboratory (IPL), Parc Científic, Universitat de València, Paterna, València 46980, Spain.ORCID https://orcid.org/0000-0002-6313-2081
Zbyněk MalenovskýSurveying and Spatial Sciences Group, School of Technology, Environments and Design, University of Tasmania, Private Bag 76, Hobart, TAS 7001, Australia.
Christiaan Van der TolDepartment of Water Resources, Faculty ITC, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
Gustau Camps-VallsImage Processing Laboratory (IPL), Parc Científic, Universitat de València, Paterna, València 46980, Spain.
Jean-Philippe Gastellu-EtchegorryCentre d'Etudes Spatiales de la Biosphère - UPS, CNES, CNRS, IRD, Université de Toulouse, 31401 Toulouse Cedex 9, France.
Philip LewisDepartment of Geography, University College London, Pearson Building, Gower Street, WC1E 6BT London, UK.
Peter NorthDepartment of Geography, Swansea University, Swansea SA2 8PP, UK.
Jose MorenoImage Processing Laboratory (IPL), Parc Científic, Universitat de València, Paterna, València 46980, Spain.
Parc Científic de la Universitat de València · ESCentre National de la Recherche Scientifique · FRSwansea University · GBUniversity of Leicester · GBUniversity of Tasmania · AUUniversity of Twente · NL

Funding

European Research Council 755617
6 · The paper itself

Abstract

An unprecedented spectroscopic data stream will soon become available with forthcoming Earth-observing satellite missions equipped with imaging spectroradiometers. This data stream will open up a vast array of opportunities to quantify a diversity of biochemical and structural vegetation properties. The processing requirements for such large data streams require reliable retrieval techniques enabling the spatiotemporally explicit quantification of biophysical variables. With the aim of preparing for this new era of Earth observation, this review summarizes the state-of-the-art retrieval methods that have been applied in experimental imaging spectroscopy studies inferring all kinds of vegetation biophysical variables. Identified retrieval methods are categorized into: (1) parametric regression, including vegetation indices, shape indices and spectral transformations; (2) nonparametric regression, including linear and nonlinear machine learning regression algorithms; (3) physically based, including inversion of radiative transfer models (RTMs) using numerical optimization and look-up table approaches; and (4) hybrid regression methods, which combine RTM simulations with machine learning regression methods. For each of these categories, an overview of widely applied methods with application to mapping vegetation properties is given. In view of processing imaging spectroscopy data, a critical aspect involves the challenge of dealing with spectral multicollinearity. The ability to provide robust estimates, retrieval uncertainties and acceptable retrieval processing speed are other important aspects in view of operational processing. Recommendations towards new-generation spectroscopy-based processing chains for operational production of biophysical variables are given.

Indexed as

Imaging spectroscopyInversionMachine learningParametric and nonparametric regressionRadiative transfer modelsRetrievalUncertaintiesVegetation properties

Identifiers

PMID36081834
PMCPMC7613341
OpenAlexW2806394060

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.