RT info:eu-repo/semantics/article T1 Identification of Paddy Croplands and Its Stages Using Remote Sensors: A Systematic Review A1 Arbelo Pérez, Manuel Imeldo A1 Fernández-Urrutia, Manuel A1 Gil, Artur A2 Física K1 rice crops K1 multispectral K1 multisource K1 radar K1 machine learning K1 vegetation indices AB Rice is a staple food that feeds nearly half of the world’s population. With the population of our planet expected to keep growing, it is crucial to carry out accurate mapping, monitoring, and assessments since these could significantly impact food security, climate change, spatial planning, and land management. Using the PRISMA systematic review protocol, this article identified and selected 122 scientific articles (journals papers and conference proceedings) addressing different remote sensing-based methodologies to map paddy croplands, published between 2010 and October 2022. This analysis includes full coverage of the mapping of rice paddies and their various stages of crop maturity. This review paper classifies the methods based on the data source: (a) multispectral (62%), (b) multisource (20%), and (c) radar (18%). Furthermore, it analyses the impact of machine learning on those methodologies and the most common algorithms used. We found that MODIS (28%), Sentinel-2 (18%), Sentinel-1 (15%), and Landsat-8 (11%) were the most used sensors. The impact of Sentinel-1 on multisource solutions is also increasing due to the potential of backscatter information to determine textures in different stages and decrease cloud cover constraints. The preferred solutions include phenology algorithms via the use of vegetation indices, setting thresholds, or applying machine learning algorithms to classify images. In terms of machine learning algorithms, random forest is the most used (17 times), followed by support vector machine (12 times) and isodata (7 times). With the continuous development of technology and computing, it is expected that solutions such as multisource solutions will emerge more frequently and cover larger areas in different locations and at a higher resolution. In addition, the continuous improvement of cloud detection algorithms will positively impact multispectral solutions. YR 2023 FD 2023 LK http://riull.ull.es/xmlui/handle/915/36921 UL http://riull.ull.es/xmlui/handle/915/36921 LA en NO https://doi.org/10.3390/s23156932 DS Repositorio institucional de la Universidad de La Laguna RD 30-dic-2024