High-resolution global topographic index values
The topographic index is a hydrological quantity describing the propensity of the soil at landscape points to become saturated with water as a result of topographic position (i.e. not accounting for other factors such as climate that also affect soil moisture but are accounted for separately). Modern land surface models require a characterisation of the land surface hydrological regime and this parameter allows the use of the TOPMODEL hydrological model to achieve this .This Geographic Information System layer is intended for use as topographic ancillary files for the TOPMODEL routing model option within the Joint UK Land Environment Simulator (JULES) land surface model. The topographic index variable here is directly comparable to the compound topographic index available from United States Geological Survey's Hydro1K at 30 sec resolution. PLEASE NOTE: This dataset is a correction to a previous version which was found to contain errors (doi:10/t7d). In the previous version all pixels north of 4.57 degrees south were shifted consistently 9.3 km to the west. This version is correctly aligned at all points. Full details about this dataset can be found at
https://doi.org/10.5285/6b0c4358-2bf3-4924-aa8f-793d468b92be
INSPIRE
Identification
- File identifier
- 6b0c4358-2bf3-4924-aa8f-793d468b92be XML
- Resource type
- dataset
Online resource
Resource identifier
- Metadata Language
- English (en)
- Spatial representation type
- grid
Encoding
- Format
- netCDF
Projection
- code
- WGS 84
Classification of data and services
- Topic category
-
- Environment
Classification of data and services
Coupled resource
Coupled resource
Classification of data and services
Coupled resource
Coupled resource
Keywords
- GEMET - INSPIRE themes, version 1.0 ()
-
- Hydrography
Geographic coverage
N
S
E
W
Temporal reference
Temporal extent
Temporal extent
- Dataset Reference Date ()
- 2015-03-03
Quality and validity
- Lineage
- The GA2 algorithm has been used to calculate these topographic index values, using base data layers provided by the HydroSHEDS suite of GIS layers. All files were generated using FORTRAN 90 at 15 arc-sec resolution (cells circa 450 m x 450 m at the Equator). PLEASE NOTE: This dataset is a correction to a previous version which was found to contain errors (doi:10/t7d). In the previous version all pixels north of 4.57 degrees south were shifted consistently 9.3 km to the west. This version is correctly aligned at all points.
- Distance
- 500 urn:ogc:def:uom:EPSG::9001
Conformity
Conformity
Conformity
Conformity
Conformity
Conformity
Restrictions on access and use
- Access constraints
- Registration is required to access this data
- Access constraints
- This product, High-resolution global topographic index values, has been created with use of data from the HydroSHEDS database which is © World Wildlife Fund, Inc. (2006-2013) and has been used herein under license. WWF has not evaluated the data as altered and incorporated within, High-resolution global topographic index values, and therefore gives no warranty regarding its accuracy, completeness, currency or suitability for any particular purpose. Portions of the HydroSHEDS database incorporate data which are the intellectual property rights of © USGS (2006-2008), NASA (2000-2005), ESRI (1992-1998), CIAT (2004-2006), UNEP-WCMC (1993), WWF (2004), Commonwealth of Australia (2007), and Her Royal Majesty and the British Crown and are used under license. The HydroSHEDS database and more information are available at http://www.hydrosheds.org
- Access constraints
- If you reuse this data, you should cite: Marthews, T.R., Dadson, S.J., Lehner, B., Abele, S., Gedney, N. (2015). High-resolution global topographic index values. NERC Environmental Information Data Centre https://doi.org/10.5285/6b0c4358-2bf3-4924-aa8f-793d468b92be
Responsible organization (s)
Contact for the resource
- Organisation name
- University of Oxford
- enquiries@ceh.ac.uk
- Organisation name
- University of Oxford
- enquiries@ceh.ac.uk
- Organisation name
- McGill University
- enquiries@ceh.ac.uk
- Organisation name
- University of Oxford
- enquiries@ceh.ac.uk
- Organisation name
- Hadley Centre for Climate Prediction and Research
- enquiries@ceh.ac.uk
- Organisation name
- NERC Environmental Information Data Centre
- enquiries@ceh.ac.uk
- Organisation name
- NERC EDS Environmental Information Data Centre
- enquiries@ceh.ac.uk
- Organisation name
- UK Centre for Ecology & Hydrology
- enquiries@ceh.ac.uk
Responsible organization (s)
Contact for the resource
- Organisation name
- University of Oxford
- enquiries@ceh.ac.uk
- Organisation name
- University of Oxford
- enquiries@ceh.ac.uk
- Organisation name
- McGill University
- enquiries@ceh.ac.uk
- Organisation name
- University of Oxford
- enquiries@ceh.ac.uk
- Organisation name
- Hadley Centre for Climate Prediction and Research
- enquiries@ceh.ac.uk
- Organisation name
- NERC Environmental Information Data Centre
- enquiries@ceh.ac.uk
- Organisation name
- NERC EDS Environmental Information Data Centre
- enquiries@ceh.ac.uk
- Organisation name
- UK Centre for Ecology & Hydrology
- enquiries@ceh.ac.uk
Metadata information
Contact for the metadata
- Organisation name
- NERC EDS Environmental Information Data Centre
- info@eidc.ac.uk
- Metadata Date
- 2024-03-04T16:50:27
- Metadata Language
- English (en)
- Character set
- utf8