The Africa soil property maps at 250 m resolution were produced using an automated spatial prediction framework, which has been fully documented and allows for reproducible research. The maps will be regularly updated and improved using an extended list of covariates and improved spatial prediction methods. It is therefore important to refer to the date of access when using these maps for modelling purposes, as there will be differences between different versions of the maps. Before using these maps for decision making purposes, please read the general disclaimer. If you discover any inconsistencies, gross errors or artifacts please report these to the SoilGrids production team.
We are aware of multiple artifacts and inconsistencies in the version of AfSoilGrids250m predictions released on February 10th 2015 and are working on updating maps in periods of less than 3 months. A detailed quality control report can be downloaded from here.
Spatial prediction scheme used to produce AfSoilGrids250m data. Spatial predictions in the case of an automated soil mapping system can be continuously updated by adding new soil field observations and new covariates..
Possible uses of these maps include, but are not limited to:
Soil-environmental modelling, land degradation studies, soil-landscape planning, biodiversity assessment (continental scale or country scale models);
General assessment of soil characteristics (baselines) for the African continent (e.g. total carbon stock) and further planning of soil surveys / new soil sampling campaigns;
Downscaling and/or merging of coarse resolution maps with finer resolution maps (100 m, 30 m);