Table 3

Global Pearson correlations between alternative types of distance

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


Note: All coefficient values are significant at the p < 0.0001 level.

Apparicio et al. International Journal of Health Geographics 2008 7:7   doi:10.1186/1476-072X-7-7

Open Data