Polycentricity is often used descriptively with regard to a regional system of settlements, usually referred to as a polycentric urban region (PUR). Although presented in much of the literature as in essence a morphological concept, polycentricity possesses a functional element that receives less attention. Polycentricity is also seen as a normative concept. However, it has not been rigorously defined using formal techniques. This paper argues that defining polycentricity in terms of both morphology and function is possible by drawing on techniques originating in social network analysis. The paper sets out a formal definition and derivation of functional polycentricity based on these techniques, which is then extended to a derivation of an index of regional functional polycentricity. The paper sets out worked examples to show how the techniques described might be utilised. The paper closes with a discussion of issues that may arise when putting these definitions into practice.
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References
1.
Advantage West Midlands and East Midlands Development Agency (2004) Smart growth: the Midlands way: a report for consultation. Advantage West Midlands and East Midlands Development Agency.
2.
Aguilera, A. (2005) Growth in commuting distances in French polycentric metropolitan areas: Paris, Lyon and Marseille, Urban Studies, 42, pp. 1537—1548.
3.
Anas, A. and Kim, I. (1996) General equilibrium models of polycentric urban land use with endogenous congestion and job agglomeration, Journal of Urban Economics, 40, pp. 232—256.
4.
Bailey, N. and Turok, I. (2001) Central Scotland as a polycentric urban region: useful planning concept or chimera?, UrbanStudies, 38(4), pp. 697—715.
5.
Battersby, S. (2006) Fold testament, New Scientist, 193(2581), pp. 34—37.
6.
Batty, M. (2001a) Cities as small worlds, Environment and Planning B, 28(5), pp. 637—638.
7.
Batty, M. (2001b) Polynucleated urban landscapes, UrbanStudies, 38(4), pp. 635—655.
8.
Breheny, M. (Ed.) (1997) The People: Where Will They Work?London: Town and Country Planning Association.
9.
Breheny, M. and Hall, P. (1999) The People; Where Will They Live?London: Town and Country Planning Association.
10.
Burt, R.S. (2004) Stuctural holes and good ideas, The American Journal of Sociology, 110(2), pp. 349—399.
11.
Castells, M. (2000) The Rise of the Network Society. Oxford: Blackwell.
12.
Census Interaction Data Service (2005) Web Interface to Census Interaction Data ( http://census.ac.uk/cids/; accessed June 2005).
13.
Champion, A.G. (2001) A changing demographic regime and evolving polycentric urban regions: consequences for the size, composition and distribution of city populations, UrbanStudies, 38(4), pp. 657—677.
14.
Copus, A.K. (2001) From core—periphery to polycentric development: concepts of spatial and aspatial peripherality, European Planning Studies, 9, pp. 539—552.
15.
Davoudi, S. (2003) Polycentricity in European spatial planning: from an analytical tool to a normative agenda, European Planning Studies, 11(8), pp. 979—999.
16.
Detr (Department Of The Environment, Transport And The Regions) (2002) Regional Planning Guidance for the South West (RPG 10). London: The Stationery Office.
17.
Ec (European Commission) (1999) ESDP- European Spatial Development Perspective: Towards a Balanced and Sustainable Development of the Territory of the European Union. Luxembourg : Office to the Official Publications of the European Community.
18.
Espon (European Spatial Planning Observation Network) (2003) ESPON in progress - preliminary results by autumn 2003. August.
19.
Geddes, P. (1915/1968) Cities in Evolution. London: Ernest Benn Ltd.
20.
Governa, F. and Salone, C. (2005) Italy and European spatial policies: polycentrism, urban networks and local innovation practices, European Planning Studies, 13(2), pp. 265—283.
21.
Government Office For The West Midlands (2004 ) Regional Planning Guidance for the West Midlands. London: The Stationery Office.
22.
Green, N. (2004) General functional polycentricity: a definition . Discussion Paper, Institute of Community Studies/ The Young Foundation/ Polynet programmes (http://www.polynet.org.uk).
23.
Green, N. (2005) Towards a definition of polycentricity in terms of network theory, and the visualisation of polycentricity using a GIS. Paper given at CUPUM 05: Computers in Urban Planning and UrbanManagement, London, July.
24.
Green, N. (2006) An analysis of commuting patterns in England & Wales using network theory-based definitions of functional polycentricity . Work in progress.
25.
Hall, P. (1984) The World Cities, 3rd edn. London: Weidenfeld and Nicolson .
26.
Hall, P. (1998) Cities in Civilization: Culture, Innovation and Urban Order. London: Wiedenfeld & Nicolson.
27.
Hall, P. and Pain, K. (Eds) (2006a) The Polycentric Metropolis: Learning from Mega-city Regions in Europe. London: Earthscan.
28.
Hall, P. and Pain, K. (2006b) From strategy to delivery: policy responses, in: P. Hall and K. Pain (Eds) The Polycentric Metropolis: Learning from Mega-city Regions in Europe, pp. 197—211. London: Earthscan.
29.
Hall, P., Pain, K. and Green, N. (2006a) Anatomy of the polycentric metropolis: eight mega-city regions in overview, in: P. Hall and K. Pain (Eds) The Polycentric Metropolis: Learning from Mega-city Regions in Europe, pp. 19—52. London: Earthscan.
30.
Hall, P., Pain, K. and Green, N. (2006b) The informational geography of europolis: mapping the flow of information, in: P. Hall and K. Pain (Eds) The Polycentric Metropolis: Learning from Mega-city Regions in Europe, pp. 70—87. London: Earthscan.
31.
Howard, E. (1898) To-morrow: A Path to Real Reform. London: Swan Sonnenschein.
32.
Ipenburg, D. and Lambregts, B. (2001) Polynuclear Urban Regions in North West Europe: A Survey of Key Actor Views. Delft: Delft University Press.
33.
Kloosterman, R. and Musterd, S. (2001) The polycentric urban region: towards a research agenda, UrbanStudies, 38(4), pp. 623—633.
34.
Lambregts, B. and Zonneveld, W. (2004) From Randstad to Deltametropolis: changing attitudes towards the scattered metropolis, European Planning Studies , 12(3), pp. 299—321.
35.
Landry, C. (2000) The Creative City. London: Earthscan Publications.
36.
Mayhew, S. (1997) Oxford Dictionary of Geography. Oxford: Oxford University Press.
37.
Meijers, E. (2005) Polycentric urban regions and the quest for synergy: is a network of cities more than the sum of the parts?, UrbanStudies, 42(4), pp. 765—781.
38.
Mumford, L. (1938) The Culture of Cities. New York : Secker & Warburg.
39.
Musterd, S. and Zelm, I. Van (2001) Polycentricity, households and the identity of places, UrbanStudies, 38(4), pp. 679—696.
40.
Nadin, V. and Dühr, S. (2005) Some help with Euro-planning jargon, Town and Country Planning, 74(3), pp. 82—85.
41.
Nordregio (2005) ESPON 1.1.1 - Potentials for polycentric development in Europe. Project Report, August 2003, Nordregio, Stockholm , Sweden.
42.
Northern Ireland Department For Regional Development (2004) Shaping the future: regional development strategy for Northern Ireland to 2025. Corporate Document Services, Northern Ireland Department for Regional Development, Belfast.
43.
Pain, K. (2006) Policy challenges of functional polycentricity in a global mega-city region: south east England, Built Environment , 32(2), pp. 194—205.
44.
Parr, J. (2004) The polycentric urban region: a closer inspection , Regional Studies, 38(3), pp. 231—240.
45.
Saxenian, A.-L. (1994) Regional Advantage. Cambridge, MA: Harvard University Press.
46.
Scottish Executive (2004) National Planning Framework for Scotland. Scottish Executive (http://www.scotland.gov.uk/Publications/2004/04/19170/35317 ).
47.
Spiekermann, K. and Wegener, M. (2004) How to measure polycentricity?Paper given at ESPON 1.1.3 Project Meeting, Warsaw, Poland, June.
48.
Taylor, P.J. (2004) World City Network: A Global Urban Analysis. London: Routledge.
49.
Taylor, P.J., Evans, D. and Pain, K. (2006) Organization of the polycentric metropolis: corporate structures and networks, in: P. Hall and K. Pain (Eds) The Polycentric Metropolis: Learning from Mega-city Regions in Europe, pp. 53—64. London: Earthscan.
50.
Turok, I. (2005) Polycentric development: the key to regional competitiveness and cohesion, Town and Country Planning, 74(3), pp. 102—104.
51.
Wasserman, S. and Faust, K. (1997) Social Network Analysis: Methods and Applications . Cambridge: Cambridge University Press.
