SoilGrids250m 2017-03 - Grade of a sub-soil being acid e.g. having a pH lower than 5 and low BS

Grade of a sub-soil being acid e.g. having a pH greater than 5 and low BS predicted using the global compilation of soil ground observations. Accuracy assessement of the maps is availble in Hengl et at. (2017) DOI: 10.1371/journal.pone.0169748. Data provided as GeoTIFFs with internal compression (co='COMPRESS=DEFLATE'). Measurement units: grade.

本数据集为基于全球土壤地面观测汇编预测得到的亚表层土壤酸度等级，涵盖pH值大于5且碱饱和度（Base Saturation，BS）偏低的亚表层土壤等级划分结果。该土壤酸度分布图的精度评估详情可参见Hengl等人（2017）的研究，DOI：10.1371/journal.pone.0169748。数据以内部压缩格式的GeoTIFF文件提供，压缩参数为co='COMPRESS=DEFLATE'。量测单位：等级。