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Table 2 Distances calculated between health services and spatial units

From: The approaches to measuring the potential spatial access to urban health services revisited: distance types and aggregation-error issues

Spatial units (origins) Health services (destinations) Types of distancea Distances calculated
Type N
Census tract centroids 904 535 6 2,901,840
Dissemination area centroids 6167 535 6 19,796,070
Block centroids 27,126 535 6 87,074,460
Block centroids adjusted with the land use map 27,126 535 6 87,074,460
Total 61,323 535 6 196,846,830
  1. aEuclidean, Manhattan, shortest network time (on foot), shortest network time (by car), shortest network time (by bicycle), and shortest network time (by public transit)