Relative space – Space is ‘perceived’ by humans and this perception may vary according to their culture, available technology and resources. Relative space does not correspond to a fixed unit – it is the ‘sense of space’ which becomes important. For example, a person in New Zealand may feel much ‘closer’ to his or her grandmother in the UK with whom he or she communicates via e-mail than with his or her neighbour to whom he or she has never spoken. A settlement that is on a railway line appears much closer than one that is not for those who use rail travel, even though the latter may be closer in an absolute sense. Relative space is perceived. It constructs and is constructed by human activity and experience.