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Table 1 Description of environmental variables, values and data sources of GIS-datasets utilized in this study

From: The contribution of travel-related urban zones, cycling and pedestrian networks and green space to commuting physical activity among adults – a cross-sectional population-based study using geographical information systems

Environmental variable

Values

Data source, year

Percentage of green areas suitable for recreation (min 1.5 ha)

0–1

Corine Land Cover, 250mx250m, 2006

Euclidean distance to green areas suitable for recreation (min 1.5 ha)

metres

Corine Land Cover raster 25m, 2006

Travel-related urban zones

pedestrian zone, pedestrian zone of a sub-centre, fringe of a pedestrian zone, intensive public transport zone, public transport zone, weak public transport zone and car-oriented zone

Urban Zones classification, 2010

Proportion of motorways

0–1

Digiroad, 250mx250m, 2014

Proportion of cycling and pedestrian lanes

0–1

Digiroad, 250mx250m, 2014

Proportion of roads suitable for cycling and walking

0–1

Digiroad, 250mx250m, 2014