2001-2020年中国玉米物候期数据集

该数据集是中国长期的高分辨率玉米物候图（China Crop phenology dataset - maize, CCPD-Maize），包含2001 - 2020年中国22个省份的玉米物候图。文件格式为GeoTIFF，空间参考为WGS84 （EPSG:4326），空间分辨率为30 m。基于长期高时空分辨率归一化植被指数（NDVI）融合数据集和每年更新的玉米分布数据集，采用相对阈值法对玉米物候特征进行识别。CCPD-Maize包括玉米生长季开始（SOS）、生长季结束（EOS）、营养生长期（VGS）、生殖生长期（RGS）以及生长期长度（LOS）。CCPD-Maize SOS和EOS数据与农业气象站观测的玉米出苗期和成熟期的验证精度较高，R²分别为0.964和0.823。

The China Crop Phenology Dataset - Maize (CCPD-Maize) is a long-term high-resolution maize phenology dataset covering maize phenology maps across 22 provinces in China from 2001 to 2020. All files are stored in GeoTIFF format, with the spatial reference system set to WGS84 (EPSG:4326) and a spatial resolution of 30 meters. Maize phenological features were identified using the relative threshold method, based on long-term high spatiotemporal resolution normalized difference vegetation index (NDVI) fusion datasets and annually updated maize distribution datasets. The CCPD-Maize dataset includes five core phenological products: maize start of growing season (SOS), end of growing season (EOS), vegetative growth stage (VGS), reproductive growth stage (RGS), and length of growing season (LOS). The validation of CCPD-Maize SOS and EOS products against maize emergence and maturity data observed by agrometeorological stations shows high accuracy, with determination coefficients (R²) of 0.964 and 0.823, respectively.

搜集汇总

背景与挑战

背景概述

该数据集是2001-2020年中国22个省份的高分辨率玉米物候图，空间分辨率为30米，基于归一化植被指数（NDVI）融合数据和玉米分布数据采用相对阈值法生成，包括生长季开始、结束、营养生长期、生殖生长期和生长期长度等关键物候特征，且与农业气象站观测数据验证精度较高（R²达0.964和0.823）。数据集以GeoTIFF格式存储，存储量为54.70GB，覆盖测绘科学技术和生态学等学科，适用于玉米生长监测和农业遥感研究。