Time geography (a.k.a. time-space geography) traces its roots back to the Swedish geographer Torsten Hägerstrand who stressed the temporal factor in the spatial human activities. The time-space path, devised by Hägerstrand, shows the movement of an individual in the spatial-temporal environment with the constraints placed on the individual by these two factors. Three categories of constraints were identified by Hägerstrand: Authority (limits of accessibility to certain places or domains placed on individuals by for example authorities), capability (limitations of movement by individuals. For example, movement is restricted by biological factors, the need for food, drink and sleep.) and coupling (for how long an individual must interact with other individuals in order to finish a task). Torsten Hägerstrand (1916 Moheda- May 3, 2004 Lund), was a Swedish geographer. ...