WISE derived soil properties on a 0.5 by 0.5 degree global grid, version 3.0
This harmonized, gridded global data set of soil parameter estimates includes files listing: (1) soil parameter estimates for the component soil units of each terrestrial grid cell, in un-binned format, and (2) soil parameter estimates aggregated or binned into a number of predefined classes.
The spatial data, with a resolution of ½ by ½ degree, was derived from the ISRIC-WISE soil database. The land surface between longitudes -180o W and +180o E and latitudes +90o N and -90o S has been characterized using 45948 unique map units; each of these can comprise from one to ten soil units, characterized according to the original legend of the 1:5 million scale Soil Map of the World (FAO-Unesco 1974).
Soil parameter estimates for each of these units were derived from analyses of some 9600 profiles held in a working copy of WISE (ver. 2.0). Twenty-two soil variables, identified as being useful for agro-ecological zoning, land evaluation, crop growth simulation, modelling of soil gaseous emissions and analyses of global environmental change, were considered.
Parameter estimates for the topsoil (0-30 cm) and the subsoil (30-100 cm) are presented for the following variables: content of organic carbon, total nitrogen, the C/N ratio, pH(H2O), CECsoil, CECclay, base saturation, total exchangeable bases, aluminum saturation, exchangeable sodium percentage (ESP), electrical conductivity of saturated paste (ECe), calcium carbonate content, gypsum content, content of sand, silt and clay, content of fragments less than 2 mm, bulk density, total porosity. For soil drainage class, effective soil depth, and available water capacity (-10 to -1500 kPa), however, parameter estimates are presented on a profile basis.
The parameter estimates - median values - presented here should be seen as best estimates; possible types and sources of uncertainty are discussed in the report. The data are considered appropriate for exploratory studies at global scale (greater than 1:5 000 000).
Note: A more recent assessment, at a resolution of 30arcsec (WISE30sec), is available at: http://data.isric.org/geonetwork/srv/eng/catalog.search#/metadata/dc7b283a-8f19-45e1-aaed-e9bd515119bc
INSPIRE
Identification
- File identifier
- d9eca770-29a4-4d95-bf93-f32e1ab419c3 XML
- Hierarchy level
- Dataset
Online resource
- Protocol
- WWW:DOWNLOAD-1.0-ftp--download
- Protocol
- WWW:LINK-1.0-http--related
- Protocol
- WWW:LINK-1.0-http--related
Resource identifier
- code
- d9eca770-29a4-4d95-bf93-f32e1ab419c3
- Metadata language
- English
- Spatial representation type
- Grid
Encoding
- Format
- zip
Projection
- code
- 4326
Classification of data and services
- Topic category
-
- Geoscientific information
Classification of data and services
Coupled resource
Coupled resource
Classification of data and services
Coupled resource
Coupled resource
Keywords
- Stratum
-
- Soil science
- Region
-
- Global
Other keywords
- Theme
-
- calcium
- carbon
- cation exchange capacity
- electrical conductivity
- nitrogen
- organic carbon
- bulk density
- soil classification
- soil depth
- soil profiles
- pH
- salinity
- texture
- water holding capacity
- nutrients
Geographic coverage
Temporal reference
Temporal extent
- Begin
- 1995-08-01
- End
- 2005-12-01
Temporal extent
- Date (Publication)
- 2005-12-01
Quality and validity
- Lineage
- Batjes NH 2005. ISRIC-WISE global data set of derived soil properties on a 0.5 by 0.5 degree grid (ver. 3.0). Report 2005/08, ISRIC - World Soil Information, Wageningen, https://library.wur.nl/WebQuery/wurpubs/fulltext/286181
- Distance
- 30 arc-minutes
Conformity
Conformity
Conformity
Conformity
Conformity
Conformity
Restrictions on access and use
- Access constraints
- Attribution 3.0 International (CC BY 3.0)
Responsible organization (s)
Contact for the resource
- Organisation name
- ISRIC - World Soil Information
- niels.batjes@isric.org
Responsible organization (s)
Contact for the resource
- Organisation name
- ISRIC - World Soil Information
- niels.batjes@isric.org
Metadata information
Contact for the metadata
- Organisation name
- ISRIC - World Soil Information
- Date stamp
- 2021-07-14T11:52:18
- Metadata language
- English
- Character set
- UTF8