High-resolution map of sugarcane cultivation in Brazil using a phenology-based method
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Published:2022-04-28
Issue:4
Volume:14
Page:2065-2080
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ISSN:1866-3516
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Container-title:Earth System Science Data
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language:en
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Short-container-title:Earth Syst. Sci. Data
Author:
Zheng Yi,dos Santos Luciano Ana Cláudia,Dong Jie,Yuan Wenping
Abstract
Abstract. Sugarcane is the most important source of sugar, and its
cultivation area has undergone rapid expansion, replacing other crops,
pastures, and forests. Brazil is the world's largest sugarcane producer and
contributed to approximately 38.6 % of the world's total production in
2019. Sugarcane in Brazil can be harvested from April to December in
the south-central area and from September to April in the northeast area. The
flexible phenology and harvest conditions of sugarcane in Brazil make it
difficult to identify the harvest area at state to country scales. In this
study, we developed a phenology-based method to identify the harvest area of
sugarcane in Brazil by incorporating the multiple phenology conditions into
a time-weighted dynamic time warping method (TWDTW). Then, we produced
annual 30 m spatial resolution sugarcane harvest maps (2016–2019) for 14
states in Brazil (over 98 % of the harvest area) based on the proposed
method using Landsat-7, Landsat-8, and Sentinel-2 optical data. The proposed method
performed well in identifying sugarcane harvest area with limited training
sample data. Validations for the 2018 harvest year displayed high accuracy,
with the user's, producer's, and overall accuracies of 94.35 %, 87.04 %, and
91.47 % in Brazil, respectively. In addition, the identified harvest area
of sugarcane exhibited good correlations with the agricultural statistical
data provided by the Brazilian Institute of Geography and Statistics (IBGE)
at the municipality, microregion, and mesoregion levels. The 30 m Brazil
sugarcane harvest maps can be obtained at
https://doi.org/10.6084/m9.figshare.14213909 (Zheng et al., 2021).
Funder
National Science Fund for Distinguished Young Scholars National Natural Science Foundation of China Fundamental Research Funds for the Central Universities
Publisher
Copernicus GmbH
Subject
General Earth and Planetary Sciences
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