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Table 3 Global Pearson correlations between alternative types of distance

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

  Cartesian system Shortest network
Distance Euclidean Manhattan Distance Time
Distances between census tracts and health services (N) 546,984 546,984 546,984 546,984
   Euclidean 1.000    
   Manhattan 0.987 1.000   
   Distance 0.988 0.971 1.000  
   Time 0.976 0.959 0.992 1.000
Distances between dissemination areas and health services (N) 3,742,218 3,742,218 3,742,218 3,742,218
   Euclidean 1.000    
   Manhattan 0.986 1.000   
   Distance 0.987 0.969 1.000  
   Time 0.975 0.957 0.992 1.000
Distances between blocks and health services (N) 16,542,414 16,542,414 16,542,414 16,542,414
   Euclidean 1.000    
   Manhattan 0.985 1.000   
   Distance 0.984 0.964 1.000  
   Time 0.970 0.950 0.992 1.000
  1. Note: All coefficient values are significant at the p < 0.0001 level.