High-resolution distribution maps of single-season rice in China from 2017 to 2022

Description in English:This dataset is the dataset of distribution maps of single-season rice in China, which contains distribution maps of single-season rice of 21 provincial administrative regions in China from 2017 to 2022. The file format is GeoTIFF and the spatial reference is WGS84 (EPSG:4326). The resolution of the distribution maps is 20-m in Heilongjiang, Jilin, Liaoning, Inner Mongolia, and Ningxia, and 10-m in the other provinces. The distribution maps are produced using the time-weighted dynamic time warping (TWDTW) method based on Sentinel-1 and Sentinel-2 images. The overall accuracy over 21 provincial administrative regions was 85.23 % on average based on 108195 samples, and the average R2 was 0.83 over three years compared with county-level statistical planting areas.classification system:0: non-single-season rice1: single-season riceUpdates:v1.1: Compared with the distribution map of double-season rice from Pan et al.'s dataset (2021) (https://doi.org/10.3390/rs13224609), the two datasets overlapped in provinces where both single- and double-season rice were cultivated, including Anhui, Hubei, Hunan, Jiangxi, Zhejiang, Fujian, and Guangxi. Version 1.1 of this dataset was updated by reclassifying the overlapped pixels to ensure that the two datasets no longer overlap.v1.2: Fix error caused by the caliber of late rice statistics in Fujian Province.2024-02-23: Update distribution maps for the year 2023.2025-04-01: Update distribution maps for the year 2024.2026-02-27: Update distribution maps for the year 2025.

本数据集为中国单季稻分布数据集，涵盖2017至2022年中国21个省级行政区的单季稻分布数据。数据集文件格式为GeoTIFF，空间参考为WGS84（EPSG:4326）。其中黑龙江、吉林、辽宁、内蒙古及宁夏的分布图分辨率为20米，其余省份分辨率为10米。本数据集基于Sentinel-1与Sentinel-2遥感影像，采用时间加权动态时间规整（time-weighted dynamic time warping，TWDTW）方法生成。基于108195个验证样本，21个省级行政区的总体平均分类精度达85.23%；与县级统计种植面积对比，三年间的平均决定系数（R²）为0.83。分类体系如下：0代表非单季稻，1代表单季稻。v1.1版本：与Pan等（2021）发布的双季稻分布数据集（https://doi.org/10.3390/rs13224609）相比，本数据集与该数据集在同时种植单、双季稻的省份（包括安徽、湖北、湖南、江西、浙江、福建及广西）存在重叠像素。本次v1.1版本通过重新分类重叠像素，确保两数据集无空间重叠。v1.2版本：修复了福建省晚稻统计口径差异引发的错误。2024年2月23日：更新2023年单季稻分布数据；2025年4月1日：更新2024年单季稻分布数据；2026年2月27日：更新2025年单季稻分布数据。