山东禹城玉米哨兵2号（Sentinel-2）叶面积指数与地面验证点数据集

山东禹城玉米哨兵2号（Sentinel-2）叶面积指数与地面验证点数据集由二部分数据组成，其一是在该区域哨兵2号卫星（（20200901，20200926）A2数据基础上反演的叶面积指数（LAI）数据，空间分辨率为10 m；其二是作者于2020年9月18-21日在山东禹城选择77个验证点的LAL实测数据，以及该数据与近同期哨兵2号卫星反演叶面积指数（LAI）数据对比数据，其中包括实测LAI、哨兵2号卫星反演LAI、两者差值及差值占实测LAI的百分比数据等。通过5种相关对比分析得到的结果表明，决定系数（R²）可以达到0.7517，该验证结果表明哨兵2号卫星LAI能体现样地观测LAI变化的75.17%。本数据集存为.tif、.shp、.kmz和.xlsx数据格式，由18个数据文件组成，数据量为182 MB（压缩为3个文件130 MB）。

The Sentinel-2 Leaf Area Index (LAI) and Ground Validation Point Dataset for Maize in Yucheng, Shandong Province consists of two parts. The first part is the LAI data retrieved based on Sentinel-2 A2 imagery acquired on 2020-09-01 and 2020-09-26 in this region, with a spatial resolution of 10 m. The second part includes the in-situ measured LAI data collected at 77 validation points selected in Yucheng, Shandong by the authors from September 18 to 21, 2020, as well as the comparison data between the in-situ measured LAI and the near-simultaneous Sentinel-2 retrieved LAI data. The comparison data covers in-situ measured LAI, Sentinel-2 retrieved LAI, the difference between the two values, and the percentage of the difference relative to the in-situ measured LAI, etc. The results from five types of relevant comparative analyses show that the coefficient of determination (R²) can reach 0.7517, indicating that the Sentinel-2 retrieved LAI can reflect 75.17% of the variation of LAI observed in the sample plots. This dataset is stored in .tif, .shp, .kmz and .xlsx formats, consisting of 18 data files with a total size of 182 MB (compressed into 3 files with a total size of 130 MB).