Download CSV Format Background Map Data for 2010 to 2030
Background Map Data
Background maps have been provided to assist Scottish local authorities in support of Review and Assessment of local air quality. These provide background concentrations of NOx, NO2, and PM10. Numerical data can be downloaded for each 1 km x 1 km grid square in Scotland in the form of comma separated (CSV) files. Co-ordinates are given for the centre of each 1 km x 1 km grid square.
Background concentrations are provided for each 1 km x 1 km grid square for each local authority area and have been calculated for 2010. Projections of background concentrations have been calculated for 2010, 2015, 2020, 2025 and 2030 from a base year of 2010. Intermediate years background pollutant concentrations were calculated via linear interpolation between the projected years. A separate CSV file is available for each Local Authority area, each pollutant and, for each year from 2010 to 2030.
The CSV file format maps for NOx and PM10 show the total background concentration and the contribution from individual emission sectors. The CSV file format maps for NO2 show the total background concentration only. This information will enable the individual emission sectors to be subtracted from the total when detailed local modelling of that sector is carried out. For example, the contribution from major roads included within a modelling assessment can be removed from the total background concentration which will help avoid double counting. Please note, where sector removal for NOx is undertaken it is also necessary to adjust the NO2 background concentration. Please see more information here.
Use the drop-down selectors to choose the local authority, pollutant, and year you require. The maps downloaded here are based on Great Britain Ordnance Survey (GBOS) co-ordinates: