Time geography

Time geography or time-space geography is an evolving transdisciplinary perspective on spatial and temporal processes and events such as social interaction, ecological interaction, social and environmental change, and biographies of individuals.[1] Time geography "is not a subject area per se",[2] but rather an integrative ontological framework and visual language in which space and time are basic dimensions of analysis of dynamic processes. Time geography was originally developed by human geographers, but today it is applied in multiple fields related to transportation, regional planning, geography, anthropology, time-use research, ecology, environmental science, and public health.[3] According to Swedish geographer Bo Lenntorp: "It is a basic approach, and every researcher can connect it to theoretical considerations in her or his own way."[4]

Origins

The Swedish geographer Torsten Hägerstrand created time geography in the mid-1960s based on ideas he had developed during his earlier empirical research on human migration patterns in Sweden.[5] He sought "some way of finding out the workings of large socio-environmental mechanisms" using "a physical approach involving the study of how events occur in a time-space framework".[6] Hägerstrand was inspired in part by conceptual advances in spacetime physics and by the philosophy of physicalism.[7]

Hägerstrand's earliest formulation of time geography informally described its key ontological features: "In time-space the individual describes a path" within a situational context; "life paths become captured within a net of constraints, some of which are imposed by physiological and physical necessities and some imposed by private and common decisions".[8] "It would be impossible to offer a comprehensive taxonomy of constraints seen as time-space phenomena", Hägerstrand said, but he "tentatively described" three important classes of constraints:

  • capability constraints — limitations on the activity of individuals because of their biological structure and/or the tools they can command,
  • coupling constraints — limitations that "define where, when, and for how long, the individual has to join other individuals, tools, and materials in order to produce, consume, and transact" (closely related to critical path analysis), and
  • authority constraints — limitations on the domain or "time-space entity within which things and events are under the control of a given individual or a given group".[9]
A space-time cube is a three-axis graph where one axis represents the time dimension and the other axes represent two spatial dimensions
Examples of the visual language of time geography: space-time cube, path, prism, bundle, and other concepts

Hägerstrand illustrated these concepts with novel forms of graphical notation (inspired in part by musical notation),[10] such as:

  • the space-time aquarium (or space-time cube), which displays individual paths in axonometric graphical projection of space and time coordinates;
  • the space-time prism, which shows individuals' possible behavior in time-space given their capability constraints and coupling constraints;
  • bundles of paths, which are the conjunction of individual paths due in part to their capability constraints and coupling constraints, and which help to create "pockets of local order";
  • concentric tubes or rings of accessibility, which indicate certain capability constraints of a given individual, such as limited spatial size and limited manual, oral-auditive and visual range; and
  • nested hierarchies of domains, which show the authority constraints for a given individual or a given group.[11]

While this innovative visual language is an essential feature of time geography, Hägerstrand's colleague Bo Lenntorp emphasized that it is the product of an underlying ontology, and "not the other way around. The notation system is a very useful tool, but it is a rather poor reflection of a rich world-view. In many cases, the notational apparatus has been the hallmark of time geography. However, the underlying ontology is the most important feature."[12] Time geography is not only about time-geographic diagrams, just as music is not only about musical notation. Hägerstrand later explained: "What is briefly alluded to here is a 4-dimensional world of forms. This cannot be completely graphically depicted. On the other hand one ought to be able to imagine it with sufficient clarity for it to be of guidance in empirical and theoretical research."[13]

By 1981, geographers Nigel Thrift and Allan Pred were already defending time geography against those who would see it "merely as a rigid descriptive model of spatial and temporal organization which lends itself to accessibility constraint analysis (and related exercises in social engineering)."[14] They argued that time geography is not just a model of constraints; it is a flexible and evolving way of thinking about reality that can complement a wide variety of theories and research methods. In the decades since then, Hägerstrand and others have made efforts to expand his original set of concepts.[15] By the end of his life, Hägerstrand had ceased using the phrase "time geography" to refer to this way of thinking and instead used words like topoecology.[16]

Later developments

Schematic and example of a space-time prism using transit network data: On the right is a schematic diagram of a space-time prism, and on the left is a map of the potential path area for two different time budgets.[17]

Since the 1980s, time geography has been used by researchers in the social sciences,[18] the biological sciences,[19] and in interdisciplinary fields.

In 1993, British geographer Gillian Rose noted that "time-geography shares the feminist interest in the quotidian paths traced by people, and again like feminism, links such paths, by thinking about constraints, to the larger structures of society."[20] However, she noted that time geography had not been applied to issues important to feminists, and she called it a form of "social science masculinity".[21] Over the following decades, feminist geographers have revisited time geography and have begun to use it as a tool to address feminist issues.[22]

GIS software has been developed to compute and analyze time-geographic problems at a variety of spatial scales. Such analyses have used different types of network datasets (such as walking networks, highway networks, and public transit schedules) as well as a variety of visualization strategies.[23] Specialized software such as GeoTime has been developed to facilitate time-geographic visualization and visual analytics.

Time geography has also been used as a form of therapeutic assessment in mental health.[24]

Benjamin Bach and colleagues have generalized the space-time cube into a framework for temporal data visualization that applies to all data that can be represented in two dimensions plus time.[25]

In the COVID-19 pandemic, time geography approaches were applied to identify close contacts.[26] The pandemic imposed restrictions on the physical mobility of humans, which invited new applications of time geography in the increasingly virtualized post-Covid era.[27]

See also

Footnotes

  1. ^ Thrift & Pred 1981, p. 277; Carlstein 1982, p. ii
  2. ^ Lenntorp 1999, p. 155
  3. ^ Sui 2012
  4. ^ Lenntorp 1999, p. 158
  5. ^ Lenntorp 1999, p. 157
  6. ^ Hägerstrand 1970, pp. 20–21
  7. ^ In Hägerstrand 1983 and Kuklinski 1987, Hägerstrand cites the writings of Albert Einstein and Arthur Eddington on general relativity as inspirations. Physicalist philosopher and sociologist Otto Neurath is cited in Hägerstrand 1970. While these ideas are important sources for time-geographic ontology, time geography should not be portrayed as exclusively physicalist. Hägerstrand also cited phenomenologist Martin Heidegger and conservationist Rachel Carson as major influences, along with numerous geographers (Kuklinski 1987, p. 507). "Hägerstrand wanted to stress the importance of the material aspects of the real world as the basis of life, with an imperative for researchers to take basic constraints into consideration: that natural resources, time, and space are limited... Nevertheless, Torsten Hägerstrand was not a hardcore materialist. His materialism is embedded in a deep concern for the importance of human experiences, reflections, and reasoning for the development of geographical knowledge." (Ellegård & Svedin 2012, p. 18)
  8. ^ Hägerstrand 1970, pp. 10–11
  9. ^ Hägerstrand 1970, pp. 11–17
  10. ^ Kuklinski 1987, p. 507; Buttimer & Mels 2006, p. 119; Ellegård & Svedin 2012
  11. ^ Hägerstrand 1970, pp. 12–17; Carlstein 1982, pp. 40–50
  12. ^ Lenntorp 1999, p. 156
  13. ^ Hägerstrand & Carlstein 2004, p. 323
  14. ^ Thrift & Pred 1981, p. 277
  15. ^ For a more extensive list of Hägerstrand's publications, see Torsten Hägerstrand
  16. ^ Ellegård & Svedin 2012, p. 18; Hägerstrand & Carlstein 2004, p. 323
  17. ^ Allen 2019
  18. ^ For example: Ellegård & de Pater 1999; Ellegård & Palm 2011; Fischer-Kowalski et al. 2010; Kwan 2004; Latham 2003; Ringhofer 2009; Schwanen & Kwan 2009; Singh et al. 2010; Tani & Surma-Aho 2012
  19. ^ For example: Baer & Butler 2000; Brasebin & Buard 2011; Downs, Horner & Tucker 2011; Huettmann & Cushman 2009; Zhao et al. 2013; Saeedimoghaddam et al. 2017
  20. ^ Rose 1993, p. 18
  21. ^ Rose 1993, p. 40
  22. ^ For example: Kwan 2007; Kwan & Ding 2008; McQuoid & Dijst 2012; Scholten, Friberg & Sandén 2012
  23. ^ For example: Andrienko et al. 2013; Kwan et al. 2014; Allen 2019
  24. ^ Lewchanin & Zubrod 2001; Sunnqvist et al. 2007; Sunnqvist et al. 2013
  25. ^ Bach et al. 2014; Bach et al. 2016
  26. ^ Yin et al. 2021
  27. ^ Klapka, Ellegård & Frantál 2020

References

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Further reading

  • Adams, Paul Channing (June 1995). "A reconsideration of personal boundaries in space-time". Annals of the Association of American Geographers. 85 (2): 267–285. doi:10.1111/j.1467-8306.1995.tb01794.x. JSTOR 2564314.
  • Adams, Paul Channing (2009). Geographies of media and communication: a critical introduction. Critical introductions to geography. Chichester, UK; Malden, MA: Wiley-Blackwell. ISBN 9781405154130. OCLC 237788695.
  • Boman, Magnus; Holm, Einar (2004). "Multi-agent systems, time geography, and microsimulations". In Olsson, Mats-Olov; Sjöstedt, Gunnar (eds.). Systems approaches and their application: examples from Sweden. Dordrecht; Boston: Kluwer Academic Publishers. pp. 95–118. doi:10.1007/1-4020-2370-7_4. ISBN 978-1402023699. OCLC 55502669.
  • Chandran, Kumari Moothedath; Mani, Monto; Chakrabarti, Amaresh (2015). "A spatio-temporal network representation for manufacturing". In Chakrabarti, Amaresh (ed.). ICORD'15—research into design across boundaries volume 2: creativity, sustainability, DfX, enabling technologies, management and applications. Smart innovation, systems and technologies. Vol. 35. Bangalore: Springer. pp. 459–470. doi:10.1007/978-81-322-2229-3_39. ISBN 9788132222286. OCLC 898892950.
  • Chowdhury, Debashish; Schadschneider, Andreas; Nishinari, Katsuhiro (December 2005). "Physics of transport and traffic phenomena in biology: from molecular motors and cells to organisms". Physics of Life Reviews. 2 (4): 318–352. arXiv:physics/0509025. Bibcode:2005PhLRv...2..318C. doi:10.1016/j.plrev.2005.09.001. S2CID 13191602.
  • DiSalle, Robert (2011). "Pitholes in space-time: structure and ontology of physical geometry". In DeVidi, David; Hallett, Michael; Clarke, Peter (eds.). Logic, mathematics, philosophy, vintage enthusiasms: essays in honour of John L. Bell. The Western Ontario series in philosophy of science. Vol. 75. New York: Springer. pp. 345–360. doi:10.1007/978-94-007-0214-1_17. ISBN 9789400702134. OCLC 719361722.
  • Ellegård, Kajsa (2019). Thinking time geography: concepts, methods and applications (PDF). Routledge studies in human geography. Abingdon; New York: Routledge. doi:10.4324/9780203701386. ISBN 9781138573789. OCLC 1055695801. S2CID 149988324.
  • Ellegård, Kajsa, ed. (2019). Time geography in the global context: an anthology (PDF). Routledge studies in human geography. Abingdon; New York: Routledge. doi:10.4324/9780203701393. ISBN 9781138573789. OCLC 1035437517. S2CID 149723887.
  • Gren, Martin (2001). "Time-geography matters". In May, Jon; Thrift, Nigel J (eds.). TimeSpace: geographies of temporality. Critical geographies, 13. London; New York: Routledge. pp. 208–225. ISBN 978-0415180832. OCLC 52996864.
  • Kellerman, Aharon (1989). Time, space, and society: geographical societal perspectives. GeoJournal library. Vol. 11. Dordrecht; Boston: Kluwer Academic Publishers. doi:10.1007/978-94-009-2287-7. ISBN 978-0792301233. OCLC 19130678. S2CID 143507942.
  • Kenett, Dror Y; Portugali, Juval (July 2012). "Population movement under extreme events". Proceedings of the National Academy of Sciences. 102 (29): 11472–11473. Bibcode:2012PNAS..10911472K. doi:10.1073/pnas.1209306109. PMC 3406849. PMID 22778423.
  • Kraak, Menno-Jan (2008). "Geovisualization and time: new opportunities for the space-time cube". In Dodge, Martin; McDerby, Mary; Turner, Martin (eds.). Geographic visualization: concepts, tools and applications. Chichester, England; Hoboken, NJ: Wiley. pp. 293–306. doi:10.1002/9780470987643.ch15. ISBN 9780470515112. OCLC 191847101.
  • Kwan, Mei-Po (2013). "Beyond space (as we knew it): toward temporally integrated geographies of segregation, health, and accessibility" (PDF). Annals of the Association of American Geographers. 103 (5): 1078–1086. doi:10.1080/00045608.2013.792177. S2CID 52022991.
  • Kwan, Mei-Po (2000). "Human extensibility and individual hybrid-accessibility in space-time: a multi-scale representation using GIS" (PDF). In Janelle, Donald G; Hodge, David C (eds.). Information, place, and cyberspace: issues in accessibility. Berlin; New York: Springer. pp. 241–256. ISBN 978-3540674924. OCLC 48013756.
  • Li, Xia; Kraak, Menno-Jan (August 2008). "The time wave: a new method of visual exploration of geo-data in timespace". The Cartographic Journal. 45 (3): 193–200. doi:10.1179/000870408X311387. S2CID 129750716.
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  • Neutens, Tijs; Weghe, Nico; Witlox, Frank; Maeyer, Philippe (March 2008). "A three-dimensional network-based space–time prism". Journal of Geographical Systems. 10 (1): 89–107. Bibcode:2008JGS....10...89N. doi:10.1007/s10109-007-0057-x. S2CID 38314672.
  • Patten, Bernard C; Straškraba, Milan; Jørgensen, Sven E (August 2011). "Ecosystems emerging. 5: Constraints". Ecological Modelling. 222 (16): 2945–2972. doi:10.1016/j.ecolmodel.2011.04.019.
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