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Table 3 Summary of GIS data sources used

From: GIS measured environmental correlates of active school transport: A systematic review of 14 studies

GIS data sources  
Network data  
Topographically Integrated Geographic Encoding and Referencing (TIGER)/line street centerline data (US) [1720]
City of London Planning Department (Ontario, Canada) [23]
The State Government of Victoria (Australia) [28]
Department of Urban Development of Taipei City (Taiwan) [29]
Bicycle and pedestrian level of service database-County's Geographic Information System (Alachua County, Florida, US) [19]
DMTI CanMap Route Logistics [25]
Commercial data: Ordnance Survey Integrated Transport Network [27]
Aerial images (e.g., Orthophotos, 4-m multispectral satellite imagery (Ikonos), 15-cm resolution [23]) [23] (enhance accuracy)
Field surveys/Audit [23] (enhance accuracy)
Demographic/land use  
Census data (e.g., U.S. Census Bureau/Statistics Canada/Australian Bureau of Statistics, Household Registration Office of Wenshan District (Taiwan), etc) [20, 2226, 28, 29]
The Metropolitan Transportation Commission and Association of Bay Area Governments (Alameda, California, US) (land use) [18]
Property appraiser's database (parcel layer in county's GIS) (Alachua County, Florida, US) (land use) [19]
Commercial data: Ordnance Survey Mastermap Address Layer 2 (land use) [27]
Derived land cover data (land use) [27]
House tax database of the Taipei Revenue Service (floor area data) [29]
Department of Transport of Taipei City (employment, vehicle ownership, and travel speed) [29]
Police Department of Taipei City (crime) [29]
Norfolk and Suffolk constabulary (traffic accidents) [27]
Commercial data (e.g., PRIZM database by Claritas [population density-urbanisation]) [21, 22]
Others  
Local Authority (streetlight data) [27]
Commercial data: Ordnance Survey Mastermap Topography (slope data) [27]
Not reported [16, 26] (network and altitude data not reported) [21]