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Table 1 Built-environment characteristics calculated along GPS and SNR routes in PostGIS; including how built-environment characteristic was defined and data source

From: GIS-modelled built-environment exposures reflecting daily mobility for applications in child health research

Built-environment characteristicDefinitionData source
Length of route (km)Length of route in kilometresLine geometries were downloaded from OSM [34]
Bluespace (%)Percentage of route along visible water (e.g. river, canal)Bluespace polygon data were downloaded from OSM [34]
Traffic lights (n)Total number of traffic light signals along routeTraffic light point data obtained from OSM [34]
Accidents (n)Total number of police-recorded traffic-related incidents along routeRoad traffic accident data was downloaded from Stats19 [35]. Accidents that occurred between the school commuting hours (7:30–9:30 and 14:30–16:30) were extracted and represented as point data
Type of street (%)
a. Main road
b. Residential
c. Minor Road
d. Footpath
Percentage of route along this road typeThe OSM road types were aggregated into four road classifications that have been used in the literature [11]: main road, minor road, residential road and footpath
WoodlandPercentage of route that has woodland within 25 m of the routeWoodland polygon data were downloaded from OS Meridian 2 [36]
Food outletsTotal number of food outlets within 100 m of routePostcode level food outlet point data were downloaded from the Food Standards Agency [37]