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Table 1 Metrics for quantifying spatial accessibility

From: Quantifying spatial accessibility in public health practice and research: an application to on-premise alcohol outlets, United States, 2013

Distance-based metrics:
Distance to nearest one destination or a group of nearby destinations
 - Euclidian distance (also known as flight or straight-line)
 - driving distance (also known as street network distance, which accounts for street network lengths and connectivity)
 - driving time (which further accounts for speed limits for each segment of the street network)
Container-based metrics:
Number of destinations within a pre-specified area or spanning distance or some spatial density measures including but not limited to:
 - per 1000 population
 - per area unit (e.g. square miles)
 - per road miles
Spatial interaction (gravity) model-based metrics:
 - Choose distance metrics
 - Define distance decay function and distance decay parameter
 - Specify the destination choice set within an area or spanning distance
 - Construct spatial accessibility index
Population-weighted accessibility metrics:
Aggregate spatial accessibility index weighted by population
 - Euclidian distance
 - driving distance
 - driving time
Population-weighted distance metrics:
Use spatial accessibility index to define differential probability access to destinations in the choice set and further weighted by population
 - Euclidian distance
 - driving distance
 - driving time