Rice-crop intensity and phenology (heading dates) of Southern China in 2021

This dataset provides multi-cycle rice heading dates for southern China in the year 2021, with a spatial resolution of 10 meters. The dataset comprises three folders labeled with the suffixes 1, 2, and 3, corresponding to the first, second, and third rice growth cycles, respectively. For fields with a single rice-crop intensity, the pixels have values exclusively in the '1' suffix folders. Fields with double rice-crop intensity have pixels with values in both the '1' and '2' suffix folders. Similarly, fields with triple rice-crop intensity have pixels with values in the '1', '2', and '3' suffix folders. The pixel values represent Day of Year (DOY) values, with most values ranging from 0 to 365. A few values are less than 0 or greater than 365. Values less than 0 indicate events that occurred in the previous year, while values greater than 365 indicate events in the following year.

本数据集提供2021年中国南方地区多季水稻抽穗期数据，空间分辨率为10米。数据集包含三个以数字1、2、3作为后缀命名的文件夹，分别对应水稻的第一、第二、第三生长季。采用单季稻种植模式的地块，其像元仅在后缀为1的文件夹中存在有效数值；双季稻种植模式的地块，像元在后缀为1和2的文件夹中均存在数值；同理，三季稻种植模式的地块，像元在后缀为1、2、3的文件夹中均存在数值。像元数值代表日序数（Day of Year, DOY），绝大多数数值分布于0至365区间内，仅少量数值小于0或大于365：数值小于0代表相关事件发生于上一年，大于365则代表事件发生于下一年。