Association between network distance and geographical distance.

A) The closest hospitals, within 200km, are also closest in the network, but hospitals further away are more or less all the same distance away in the network. B) The relation between geographical and network distance measured from the Oxford University Hospitals (Black) and the South Tyneside Hospital (Red) to all other hospitals. The network distance from C) Oxford and D) South Tyneside hospitals, dashed circles show geographical from the initial hospital at intervals of 100km.