Σύγκριση μεθόδων

	Accessibility Analysis	Space-Time Cube
Πεδίο	Human Geography	Human Geography
Οικογένεια	Process / pipeline	Process / pipeline
Έτος προέλευσης	1959	1970
Δημιουργός	Walter G. Hansen	Torsten Hägerstrand (time geography); cube popularized by Menno-Jan Kraak
Τύπος	Spatial index of the ease of reaching opportunities from a location	Spatiotemporal data structure and visualization framework
Θεμελιώδης πηγή	Hansen, W. G. (1959). How accessibility shapes land use. Journal of the American Institute of Planners, 25(2), 73–76.	Hägerstrand, T. (1970). What about people in regional science? Papers of the Regional Science Association, 24(1), 6–21.
Εναλλακτικές ονομασίες	Hansen Accessibility, Gravity Accessibility Measure, Potential Accessibility, Spatial Accessibility Index	Hägerstrand Space-Time Cube, Space-Time Aquarium, Spatiotemporal Cube, Time-Geographic Cube
Συναφείς	4	4
Σύνοψη	Accessibility analysis measures how easily opportunities — jobs, shops, clinics, parks — can be reached from a given location, combining the attractiveness (size) of destinations with the cost of travelling to them. The gravity-based formulation introduced by Walter Hansen in 1959 sums the opportunities at all destinations, each discounted by a distance-decay function of travel cost, producing a single accessibility score per origin that has become a foundational concept in transport geography and urban planning.	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.