WoSIS Soil Profile Database
The World Soil Information Service (WoSIS) aims to serve the user with a selection of standardised/ harmonised soil data. These quality-assessed data may be used to underpin digital soil mapping and a range of global assessments. WoSIS is an important building block of ISRIC’s evolving, searchable data infrastructure.
The aims of the World Soil Information Service are to:
- Safeguard world soil data 'as is' (especially for soil legacy data)
- Share soil data (point, polygon, grid) upon their standardization and harmonization
- Provide quality-assessed soil data for digital soil mapping and a range of environmental applications.
All data submitted for consideration in WoSIS are first preserved ‘as is’ in the ISRIC WDC-Soils Data Repository. Subsequently, they are quality-assessed, standardised and, where possible, harmonised using consistent procedures. Special attention is being paid to the selection of soil properties considered in the GlobalSoilMap specifications. These include soil pH, soil organic carbon content, soil texture, bulk density, cation exchange capacity, and soil water retention.
The WoSIS workflow is visualised below:
Some 100,000 geo-referenced, standardised point data are currently served from WoSIS. This corresponds with over 5 million soil records. The number of measured data for each property varies between profiles and with depth, generally depending on the purpose of the initial studies. Further, in most source data sets, there are fewer data for soil physical as opposed to soil chemical attributes. There also are fewer measurements for deeper than for surficial horizons. Generally, limited quality information is associated with the various source data. This has been flagged in the data set.
The red dots represent the complement of soil profiles for which standardised data are served by WFS (98,776 profiles). The green dots refer to data in the standardisation stage (Canadian Soil Information Service; Canadian Upland Forest Soil Carbon Database; Forest Ecosystem Carbon Database, and Canada Soil Profile Database, in total 12,170 profiles). The blue dots refer to data that are being imported into the WoSIS data model (Soil and Landscape Grid of Australia DSM project; 274,495 profiles). Not shown is the selection of soil profile data held in our repository, with adequate licences (i.e. less restrictive than CC-BY, CC-BY-NC), that we could not yet process/standardise due to time constraints.
Data served from WoSIS are supplied in compliance with the licence specified by each data provider. The data can be accessed freely here.
At ISRIC, the quality-assessed point data are mainly used to underpin digital soil mapping at increasingly detailed resolutions (SoilGrids).