This state-of-the-art database was established in July 2008 by IIASA and FAO in partnership with:
The data entry and harmonization within a GIS was carried out at IIASA; verification of the database was undertaken by all partners.
HWSD was last updated in 2013.
The HWSD constitutes significant improvements for about 60% of the land area in comparison with the FAO/UNESCO Soil Map of the World.
Further expansion and update of the HWSD is foreseen to include the soil information available in the USA, Canada, Australia, India, Pakistan, and a number of West African countries.
The HWSD is already being widely used as academic resource in universities and as background information in international organizations like the EU, the UN and World Bank to improve technical support measures to developing countries.
HWSD has two main goals:
An additional incentive for producing HWSD was the need to enhance the edaphic assessment procedures for agricultural crops within the context of the FAO/IIASA Global Agro-ecological Zones assessments.
Until the release of HWSD, the standard global soil map was the 1:5,000,000 scale FAO–UNESCO Digital Soil Map of the World, compiled in the 1970s. As large volumes of new data had recently been assembled by national and regional soil institutions, FAO and IIASA decided to combine these with the information contained in the FAO-UNESCO Digital Soil Map of the World to produce the new comprehensive soil database, HWSD.
The HWSD is composed of a raster image file and a linked attribute database. The raster database consists of 21600 rows and 43200 columns, of which 221 million grid cells cover the globe's land territory.
The HWSD allows the soil components and attributes to be seen at a high level of spatial resolution at the global scale.
Soil information, from the global to the local scale, has often been the one missing biophysical information layer. Its absence has added to the uncertainties of predicting potentials and constraints for food and fiber production. The lack of reliable and harmonized soil data has considerably hampered global assessments and environmental impact studies, land degradation assessments and adapted sustainable land management interventions.
Many of today's urgent challenges will benefit from HWSD, including current and future estimations of potential land productivity, identification of land and water limitations, and improved assessment of the risks of land degradation, particularly soil erosion.
HWSD provides national and international agricultural planners with a tool for resolving questions about land suitability for crop cultivation and bioenergy feedstocks, such as corn, sugar cane, and grasses. This is important for rational natural resource management, making progress towards eradicating hunger and poverty, and addressing food security and sustainable agricultural development, especially with regard to the threats of global climate change impacts and its urgent needs for adaptation and mitigation.
Last edited: 16 March 2021
Senior Research Scholar Water Security Research Group - Biodiversity and Natural Resources Program
International Institute for Applied Systems Analysis (IIASA)
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