Covariates list for generating DTB100 of China

This is a list of environmental covariates for generating depth-to-bedrock map of China at a spatial resolution of 100 meters. covariates code, title, description, resolution, citation url and publication date are given in corresponding column. The 'RF', 'GBT', 'QRF' clunmns seperately represent whether the covariate is used by random forest model, gradient boosting tree model and quantitle regression forest model(1 stand for it is used, 0 is not).