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Validation of a forage production index (FPI) derived from MODIS fcover time-series using high-resolution satellite imagery: methodology, results and opportunities

Roumiguié, Antoine and Jacquin, Anne and Sigel, Grégoire and Poilvé, Hervé and Hagolle, Olivier and Daydé, Jean Validation of a forage production index (FPI) derived from MODIS fcover time-series using high-resolution satellite imagery: methodology, results and opportunities. (2015) Remote Sensing, 7 (9). 11525-11550. ISSN 2072-4292

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Official URL: http://dx.doi.org/10.3390/rs70911525

Abstract

An index-based insurance solution was developed to estimate and monitor near real-time forage production using the indicator Forage Production Index (FPI) as a surrogate of the grassland production. The FPI corresponds to the integral of the fraction of green vegetation cover derived from moderate spatial resolution time series images and was calculated at the 6 km x 6 km scale. An upscaled approach based on direct validation was used that compared FPI with field-collected biomass data and high spatial resolution (HR) time series images. The experimental site was located in the Lot and Aveyron departments of southwestern France. Data collected included biomass ground measurements from grassland plots at 28 farms for the years 2012, 2013 and 2014 and HR images covering the Lot department in 2013 (n = 26) and 2014 (n = 22). Direct comparison with ground-measured yield led to good accuracy (R-2 = 0.71 and RMSE = 14.5%). With indirect comparison, the relationship was still strong (R-2 ranging from 0.78 to 0.93) and informative. These results highlight the effect of disaggregation, the grassland sampling rate, and irregularity of image acquisition in the HR time series. In advance of Sentinel-2, this study provides valuable information on the strengths and weaknesses of a potential index-based insurance product from HR time series images.

Item Type:Article
Additional Information:Thanks to MDPI editor. The original PDF of the article can be found at : http://www.mdpi.com/2072-4292/7/9/11525/htm
ProdINRA Id:334606
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Airbus (FRANCE)
French research institutions > Centre National d'Études Spatiales - CNES (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
French research institutions > Institut National de la Recherche Agronomique - INRA (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Institut national des sciences de l'Univers - INSU (FRANCE)
Laboratory name:
Funders:
Bruno Lepoivre - Crédit Agricole Assurances Pacifica - CNES - French Space Agency
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Deposited By: INRA INRA
Deposited On:09 Nov 2017 09:20

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