CCD-Rice: a long-term paddy rice distribution dataset in China at 30 m resolution
<p>As one of the most widely cultivated grain crops, paddy rice is a vital staple food in China and plays a crucial role in ensuring food security. Over the past decades, the planting area of paddy rice in China has shown substantial variability. Yet, there are no long-term high-resolution ric...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2025-05-01
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| Series: | Earth System Science Data |
| Online Access: | https://essd.copernicus.org/articles/17/2193/2025/essd-17-2193-2025.pdf |
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| Summary: | <p>As one of the most widely cultivated grain crops, paddy rice is a vital staple food in China and plays a crucial role in ensuring food security. Over the past decades, the planting area of paddy rice in China has shown substantial variability. Yet, there are no long-term high-resolution rice distribution maps in China, which hinders our ability to estimate greenhouse gas fluxes and crop production. This study developed a new optical satellite-based rice-mapping method using a machine learning model and appropriate data preprocessing strategies to mitigate the impact of cloud contamination and missing data in optical remote sensing observations on rice mapping. This study produced CCD-Rice (China Crop Dataset-Rice), the first high-resolution rice distribution dataset in China from 1990 to 2016. Based on 394 753 validation samples, the overall accuracy of the distribution maps in each provincial administrative region averaged 89.61 %. Compared with 20 544 county-level statistical data, the coefficients of determination (<span class="inline-formula"><i>R</i><sup>2</sup></span>) of single- and double-season rice in each year averaged 0.85 and 0.78, respectively. The distribution maps can be obtained at <a href="https://doi.org/10.57760/sciencedb.15865">https://doi.org/10.57760/sciencedb.15865</a> (Shen et al., 2024a).</p> |
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| ISSN: | 1866-3508 1866-3516 |