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Table 2 Distances calculated between health services and spatial units

From: Comparing alternative approaches to measuring the geographical accessibility of urban health services: Distance types and aggregation-error issues

Spatial units (origins) Health services (destinations) Types of distance* Distances calculated
Type N    
Census tracts 852 642 4 2,187,936
Dissemination areas 5,829 642 4 14,968,872
Blocks 25,767 642 4 66,169,656
Total 32,448 642 4 83,326,464
  1. * Euclidean, Manhattan, shortest network distance, shortest network time.