Skip to main content

Table 2 Summary of GIS-based source indicators

From: Spatial variability in levels of benzene, formaldehyde, and total benzene, toluene, ethylbenzene and xylenes in New York City: a land-use regression study

Source Category

Variables

Data Sources

Traffic Indicators

Un-weighted and kernel-weighted road and traffic density, number of signaled intersections, distance to and characteristics of nearest roadway

New York Metropolitan Transportation Council, Highway Performance Monitoring System, Accident Location Information System, Market Planning Solutions TrafficMetrix data, NYC Department of Transportation Truck Routes

Population Metrics

Census population density, LandScan population density

2000 US Census, Oak Ridge National Laboratory LandScanTM

Built Space

Density of built space by land use category

NYC Department of City Planning Primary LandUse Tax Lot Output (PLUTOâ„¢)

Permitted Emissions

Permitted combustion sources, solvent use industries (excluding dry cleaning), petroleum bulk storage locations

NYS Department of Environmental Conservation, NYC Department of Environmental Protection

Transportation and waste transfer facilities

School bus depots, waste transfer stations, wastewater treatment facilities, marine terminals, airports

NYC Department of Citywide Administrative Services, NYC Department of Education, NYC Department of Sanitation, NYC Office of Emergency Management

  1. Calculated within 50 m buffers between 50 to 500 meters and 100 m buffers between 500 to 1000 meters.