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http://hdl.handle.net/2067/42833
Title: | Near-real time forest change detection using PlanetScope imagery | Authors: | Francini, Saverio McRoberts, Ronald E. Giannetti, Francesca Mencucci, Marco Marchetti, Marco Scarascia Mugnozza, Giuseppe Chirici, Gherardo |
Journal: | EUROPEAN JOURNAL OF REMOTE SENSING | Issue Date: | 2020 | Abstract: | © 2020 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group. To combat global deforestation, monitoring forest disturbances at sub-annual scales is a key challenge. For this purpose, the new Planetscope nano-satellite constellation is a game changer, with a revisit time of 1 day and a pixel size of 3-m. We present a near-real time forest disturbance alert system based on PlanetScope imagery: the Thresholding Rewards and Penances algorithm (TRP). It produces a new forest change map as soon as a new PlanetScope image is acquired. To calibrate and validate TRP, a reference set was constructed as a complete census of five randomly selected study areas in Tuscany, Italy. We processed 572 PlanetScope images acquired between 1 May 2018 and 5 July 2019. TRP was used to construct forest change maps during the study period for which the final user’s accuracy was 86% and the final producer’s accuracy was 92%. In addition, we estimated the forest change area using an unbiased stratified estimator that can be used with a small sample of reference data. The 95% confidence interval for the sample-based estimate of 56.89 ha included the census-based area estimate of 56.19 ha. |
URI: | http://hdl.handle.net/2067/42833 | ISSN: | 2279-7254 | DOI: | 10.1080/22797254.2020.1806734 | Rights: | CC0 1.0 Universal |
Appears in Collections: | A1. Articolo in rivista |
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Near real time forest change detection using PlanetScope imagery.pdf | 5.25 MB | Adobe PDF | Request a copy |
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