Fig. 4From: Mapping the forage nitrogen, phosphorus, and potassium contents of alpine grasslands by integrating Sentinel-2 and Tiangong-2 dataDensity distribution of the R2, RMSE, and RPD in the validation dataset (30% of the data) according to the SVM and RF models. The solid line indicates the average and the dashed line indicates the confidence interval (2.5 and 97.5 percentile)Back to article page