A1 Recreation potential components and data sources. Factors, scores and distance function thresholds defined in the expert consultation process. Component Factors (spatial dataset) Data source Assigned score Distance function thresholds (m) Comments 50% 0% Degree of naturalness Closeness to potential native vegetation SITxell database – Habitats dataset (Barcelona Regional Council) 0-1 N/A N/A Based on an ecosystem assessment of its ecological succession stage. Originally scores ranged from 0 (artificial land covers) to 4 (climax ecosystem). Nature protection Areas designated as natural parks Environment geodatabase (Catalan Government) 1 N/A N/A Areas designated as regional protected areas or Natura 2000 sites Environment geodatabase (Catalan Government) 0.8 N/A N/A It excludes areas which are also designated as natural parks. Remarkable protected trees Environment geodatabase (Catalan Government) 0.8 500 1000 Areas designated as geological heritage Environment geodatabase (Catalan Government) 0.5 N/A N/A Water Lakes, ponds, reservoirs and wetlands SITxell database – Habitats dataset (Barcelona Regional Council) 1 500 1000 Beaches SITxell database – Habitats dataset (Barcelona Regional Council) 1 1000 2000 Main network Environment geodatabase (Catalan Government) 0.5 500 1000 Rivers usually having permanent water flow all the year. Angling river areas Environment geodatabase (Catalan Government) 0.3 500 1000
applied. Final map of vegetation had values between zero (i.e., no vegetation) and one (i.e., totally covered by vegetation). Table A3 Input data for the processing of the air purification model. All the input variables were computed at 100 m of resolution (pixel size). Component Data description Data source Comments Air pollution measurements Average annual pollutant concentrations in BMR monitoring stations (NO2) - year 2013 Air quality database (Catalan Government - http://qualitatdelaire.cat) Exported to vector data (points) Spatial predictors Land cover dataset SITxell database (www.sitxell.eu) (Barcelona Regional Council) Converted from vector data (polygons) Digital Elevation Model (DEM) SITxell database (www.sitxell.eu) (Barcelona Regional Council) Resampled from 15x15m raster (bilinear resampling) Average mean temperature (annual) Climatic Digital Atlas of Catalonia (www.uab.es/atles-climatic) Resample from 180x180 m raster (bilinear resampling) Average mean precipitation (annual) Climatic Digital Atlas of Catalonia (www.uab.es/atles-climatic) Resample from 180x180 m raster (bilinear resampling) Average wind speed at 60m altitude from land surface (annual) Environment geodatabase (Catalan Government) Resample from 200x200 m raster (bilinear resampling) Population density grid Census tract dataset (INE, 2011) Residential use classes extracted from land cover map (LCMC, 2009) Intersect assuming equal population distribution within residential land for each census tract Road network TeleAtlas® MultiNet™ dataset (update 2014) Vegetation map Urban vegetation Global Human Settlement Layer (GHSL JRC, IPSC, Ferri et al., 2014) Forest vegetation High Resolution Global Forest map (Hansen, 2013) Permanent crops SITxell database (www.sitxell.eu) (Barcelona Regional Council) Extracted from land dataset