Skip to main content

Table 2 Existing metrics

From: The Canadian Urban Environmental Health Research Consortium – a protocol for building a national environmental exposure data platform for integrated analyses of urban form and health

Existing Metrics Geographic Extent Spatial Resolution Time Periods Description Ref.
Air Pollution
 Surface concentrations of PM2.5 National 1 km 1998 to present Satellite-derived annual mean concentration [27
 Ambient concentrations of NO2 National <100 m 1984–2012 National land use regression model of annual mean concentration, based on 2011 data and adjusted for historical estimates [28]
 Ambient concentrations of NO2 National <100 m 1984–2006 National model of annual mean concentration based on 10 city-specific land use regression models (field monitoring between 2002 and 2010) and adjusted using observational data for each year [29]
 Ambient concentrations of O3 National 10 km - 21 km 2003 - present Air quality forecast-based estimate, adjusted with surface observation data - annual and monthly average concentration [30]
 Ambient concentrations of SO2 National 30 km 2005–2015 Air quality model-based estimate of 3-year running annual average concentration [32]
Noise Pollution
 A-weighted sound pressure level and related summary metrics Regional (Montreal) 10 m ~ 2014 Land use regression-based model based on field monitoring conducted 2010–2014 [33]
 A-weighted sound pressure level and related summary metrics Regional (Toronto) 10 m ~ 2013 Land use regression-based model based on field monitoring conducted 2012–2013 [34]
 A-weighted sound pressure level and related summary metrics Regional (Vancouver) 10 m 2003 Sound propagation model (CadnaA) [36]
Greenness
 Normalized Difference Vegetation Index National + 30 m 1985 to present Satellite-derived (Landsat) [37, 38]
 Normalized Difference Vegetation Index National + 250 m 2000 to present Satellite-derived (MODIS) [39]
 Normalized Difference Vegetation Index National + 1 km 1979 to present Satellite-derived (AVHRR) [40, 41]
 Green View Index National Postal code-specific 2017 only Google Street View-derived not published (or use MIT)
Climate and Weather
 Temperature metrics (daily, monthly, annual averages, ranges, event frequencies) and derived water balance metrics (potential and actual evapotranspiration) National 10 km 1950–2010 Interpolated continuous surfaces based on observation station data [42]
 Temperature metrics (max, min, mean, heat deg. days, cool deg. days), total precipitation, snow on ground National N/A 1950- to present National Climate Data and Information Archive - observation station data [43]
Neighbourhood Factors
 Walkability National Postal code-specific circa 2015 GIS-derived walkability (based on land use mix, street connectivity and population density) [47]
 Walkability Regional Postal code-specific various specific years GIS-derived walkability (land-use mix, residential density, and street connectivity) [48]
 Canadian Marginalization Deprivation Index National Census dissemination area Census years 1991–2011 Derived from census variables [49
 Pampalon Deprivation Index National Census dissemination area Census years 1991–2011 Derived from census variables [50]
 Nighttime light National + 1 km 1992 to present Satellite-derived from the US Defense Meteorological Satellite Program’s Operational Linescan System (DMSP-OLS) - annual average [51]