NSI Topsoil Selenium

The map covers England and Wales showing interpolated values of topsoil Selenium concentrations (mg/kg) at a 1km grid resolution.

The concentrations of selenium were determined using energy dispersive X-ray fluorescence spectrometry with a lower limit of detection of 0.1 mg/kg and typical coefficients of variation of around 5 % for repeated analyses of certified reference materials. The coefficient of variation (CV) expresses the error associated with subsampling and analysis; CV values of less than around 10 % suggest that analyses are reasonably accurate.

Acknowledgement: This image is derived from research conducted by the British Geological Survey and Rothamsted Research, and is based on soil samples collected for the National Soil Inventory by the Soil Survey of England and Wales (now the National Soil Resources Institute, Cranfield University).

These data are made available under the Open Government Licence, subject to the following acknowledgement accompanying the reproduced BGS materials: "Contains British Geological Survey materials © NERC [year]".

Selenium map
Title NSI topsoil Selenium Concentrations
Source British Geological Survey
Enquiries BGS Enquiries
Scale(s) 1km grid resolution
Coverage England and Wales
Format ESRI grid data (others available by request)
Price The 1 km grid data is free for use under Open Government Licence terms.
Uses Regional to national level use
Downloads 1km Grid data
Map Viewer View in UKSO Map viewer
WMS Link https://map.bgs.ac.uk/arcgis/services/
Images High resolution | low resolution