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A metropolitan area is a large population center consisting of a large city and its adjacent zone of influence, or of several neighboring cities or towns and adjoining areas, with one or more large cities serving as its hub or hubs.
A metropolitan area usually combines an agglomeration (the contiguous built-up area) with peripheral zones not themselves necessarily urban in character but closely bound to the centre by employment or commerce; these zones are also sometimes known as a commuter belt, and may extend well beyond the urban periphery depending on the definition used.
The core cities in a polycentric metropolitan area need not be physically connected by continuous built-up development, distinguishing the concept from conurbation, which requires urban contiguity. In an MA, it is sufficient that central cities together constitute a large population nucleus with which other constituent parts have a high degree of integration.
The term metropolitan area is sometimes abbreviated to 'metro', for example in Metro Manila and Washington, DC Metro Area, and then should not be mistaken to mean the metro rail system of the city. In France the official term for a metropolitan area is an aire urbaine.
In Japan, individual cities form metropolitan areas or conurbations such as the capital zone of Tokyo-Yokohama or Osaka-Kobe, with which Kyoto is sometimes included as part of a wider Keihan zone.
If several metropolitan areas are located in succession, metropolitan areas are sometimes grouped together as a megalopolis. A megalopolis consists of several interconnected cities (and their suburbs), between which people commute, and which are so close together that suburbs can claim to be suburbs of more than one city.
This concept was first proposed by the French geographer Jean Gottmann in his book Megalopolis, who studied the northeastern United States. One famous example is the BosWash megalopolis consisting of Boston, Hartford, New York City, Philadelphia, Baltimore, Washington, and vicinity. Other megalopolitan zones are Tokyo and Osaka, the Ruhr Area and parts of the Low Countries. It has been suggested that the whole of south-eastern, Midland and parts of northern England will evolve into a megalopolis dominated by London.
Megacity is a general term for agglomerations or metropolitan areas usually with a total population in excess of 10 million people. In Canada, megacity refers informally to the results of merging a central city with its suburbs as one large municipality. A Canadian "megacity", however, is not necessarily an entirely urban area, as many cities so named have both rural and urban portions, and do not necessarily constitute a large metropolis. Their definition is thus close to the metropolitan area concept.
See also
External link
- metropolis.org (http://www.metropolis.org/) - An organisation of world metropolises
de:Metropolregion
es:Conurbación
fr:Mégalopole
pl:Obszar metropolitalny he:מטרופולין
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