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| Time Geography Analysis× | Space-Time Cube× | |
|---|---|---|
| Field | Human Geography | Human Geography |
| Family | Process / pipeline | Process / pipeline |
| Year of origin | 1970 | 1970 |
| Originator≠ | Torsten Hägerstrand | Torsten Hägerstrand (time geography); cube popularized by Menno-Jan Kraak |
| Type≠ | Framework for representing individual movement and constraints in space and time | Spatiotemporal data structure and visualization framework |
| Seminal source | Hägerstrand, T. (1970). What about people in regional science? Papers of the Regional Science Association, 24(1), 6–21. DOI ↗ | Hägerstrand, T. (1970). What about people in regional science? Papers of the Regional Science Association, 24(1), 6–21. DOI ↗ |
| Aliases | Hägerstrand Time Geography, Space-Time Path Analysis, Space-Time Prism Analysis, Time-Space Geography | Hägerstrand Space-Time Cube, Space-Time Aquarium, Spatiotemporal Cube, Time-Geographic Cube |
| Related | 4 | 4 |
| Summary≠ | Time geography is a framework, introduced by Torsten Hägerstrand in 1970, that represents human activity as continuous trajectories through a joint space-time coordinate system rather than as static points on a map. Each individual traces a space-time path through the 'space-time aquarium', and the set of all locations that can be reached and returned from within a time budget forms a space-time prism, whose spatial footprint is the potential path area. The framework grounds accessibility and mobility in the inescapable fact that people can be in only one place at a time and that movement consumes both space and time. | The space-time cube is a framework from time geography for representing and analyzing phenomena that move and change over both space and time. Two horizontal axes carry geographic location and a vertical axis carries time, so each observation becomes a point in a three-dimensional x–y–t volume and a moving object traces a continuous 'space-time path' through the cube. Introduced conceptually by Torsten Hägerstrand in 1970 and turned into a practical analytic and cartographic tool by Menno-Jan Kraak, it underpins modern spatiotemporal hot-spot and trajectory analysis. |
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