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Mapping of Rice Varieties and Sowing Date Using X-Band SAR Data
Rice is a major staple food for nearly half of the world’s population and has a considerable contribution to the global agricultural economy. While spaceborne Synthetic Aperture Radar (SAR) data have proved to have great potential to provide rice cultivation area, few studies have been performed to...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5795876/ https://www.ncbi.nlm.nih.gov/pubmed/29361776 http://dx.doi.org/10.3390/s18010316 |
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author | Phan, Hoa Le Toan, Thuy Bouvet, Alexandre Nguyen, Lam Dao Pham Duy, Tien Zribi, Mehrez |
author_facet | Phan, Hoa Le Toan, Thuy Bouvet, Alexandre Nguyen, Lam Dao Pham Duy, Tien Zribi, Mehrez |
author_sort | Phan, Hoa |
collection | PubMed |
description | Rice is a major staple food for nearly half of the world’s population and has a considerable contribution to the global agricultural economy. While spaceborne Synthetic Aperture Radar (SAR) data have proved to have great potential to provide rice cultivation area, few studies have been performed to provide practical information that meets the user requirements. In rice growing regions where the inter-field crop calendar is not uniform such as in the Mekong Delta in Vietnam, knowledge of the start of season on a field basis, along with the planted rice varieties, is very important for correct field management (timing of irrigation, fertilization, chemical treatment, harvest), and for market assessment of the rice production. The objective of this study is to develop methods using SAR data to retrieve in addition to the rice grown area, the sowing date, and the distinction between long and short cycle varieties. This study makes use of X-band SAR data from COSMO-SkyMed acquired from 19 August to 23 November 2013 covering the Chau Thanh and Thoai Son districts in An Giang province, Viet Nam, characterized by a complex cropping pattern. The SAR data have been analyzed as a function of rice parameters, and the temporal and polarization behaviors of the radar backscatter of different rice varieties have been interpreted physically. New backscatter indicators for the detection of rice paddy area, the estimation of the sowing date, and the mapping of the short cycle and long cycle rice varieties have been developed and assessed. Good accuracy has been found with 92% in rice grown area, 96% on rice long or short cycle, and a root mean square error of 4.3 days in sowing date. The results have been discussed regarding the generality of the methods with respect to the rice cultural practices and the SAR data characteristics. |
format | Online Article Text |
id | pubmed-5795876 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-57958762018-02-13 Mapping of Rice Varieties and Sowing Date Using X-Band SAR Data Phan, Hoa Le Toan, Thuy Bouvet, Alexandre Nguyen, Lam Dao Pham Duy, Tien Zribi, Mehrez Sensors (Basel) Article Rice is a major staple food for nearly half of the world’s population and has a considerable contribution to the global agricultural economy. While spaceborne Synthetic Aperture Radar (SAR) data have proved to have great potential to provide rice cultivation area, few studies have been performed to provide practical information that meets the user requirements. In rice growing regions where the inter-field crop calendar is not uniform such as in the Mekong Delta in Vietnam, knowledge of the start of season on a field basis, along with the planted rice varieties, is very important for correct field management (timing of irrigation, fertilization, chemical treatment, harvest), and for market assessment of the rice production. The objective of this study is to develop methods using SAR data to retrieve in addition to the rice grown area, the sowing date, and the distinction between long and short cycle varieties. This study makes use of X-band SAR data from COSMO-SkyMed acquired from 19 August to 23 November 2013 covering the Chau Thanh and Thoai Son districts in An Giang province, Viet Nam, characterized by a complex cropping pattern. The SAR data have been analyzed as a function of rice parameters, and the temporal and polarization behaviors of the radar backscatter of different rice varieties have been interpreted physically. New backscatter indicators for the detection of rice paddy area, the estimation of the sowing date, and the mapping of the short cycle and long cycle rice varieties have been developed and assessed. Good accuracy has been found with 92% in rice grown area, 96% on rice long or short cycle, and a root mean square error of 4.3 days in sowing date. The results have been discussed regarding the generality of the methods with respect to the rice cultural practices and the SAR data characteristics. MDPI 2018-01-22 /pmc/articles/PMC5795876/ /pubmed/29361776 http://dx.doi.org/10.3390/s18010316 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Phan, Hoa Le Toan, Thuy Bouvet, Alexandre Nguyen, Lam Dao Pham Duy, Tien Zribi, Mehrez Mapping of Rice Varieties and Sowing Date Using X-Band SAR Data |
title | Mapping of Rice Varieties and Sowing Date Using X-Band SAR Data |
title_full | Mapping of Rice Varieties and Sowing Date Using X-Band SAR Data |
title_fullStr | Mapping of Rice Varieties and Sowing Date Using X-Band SAR Data |
title_full_unstemmed | Mapping of Rice Varieties and Sowing Date Using X-Band SAR Data |
title_short | Mapping of Rice Varieties and Sowing Date Using X-Band SAR Data |
title_sort | mapping of rice varieties and sowing date using x-band sar data |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5795876/ https://www.ncbi.nlm.nih.gov/pubmed/29361776 http://dx.doi.org/10.3390/s18010316 |
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