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Urban area (France)
An ''aire urbaine'' (literal and official translation: "urban area"〔(Definitions and methods: Urban area )〕) is an INSEE (France's national statistics bureau) statistical concept describing a core of urban development and the extent of its commuter activity. When applied to larger agglomerations, this unit becomes similar to a U.S. metropolitan area, and the INSEE sometimes uses the term ''aire métropolitaine'' to refer to France's larger ''aires urbaines''.
==Composition==
The ''aire urbaine'' is based on France's nationwide map of interlocking administrative ''commune'' municipalities: when a ''commune'' has over 2000 inhabitants and contains a centre of dense construction (buildings spaced no more than 200 metres apart), it is combined with other adjoining communes fulfilling the same criteria to become a single ''unité urbaine'' ("urban unit" 〔(Definitions and methods: Urban unit )〕); if an urban unit offers over 10,000 jobs and its economical development is enough to draw more than 40% of the population of a nearby municipalities (and other municipalities drawn to these in the same way) as commuters, it becomes a ''pôle urbain'' ("urban cluster"〔(Definitions and methods: Urban Cluster )〕) and the "commuter municipalities" become its ''couronne'' ("rim"〔(Definitions and methods: Rim )〕), but this only on the condition that the urban unit itself is not part of another urban cluster's rim. The ''aire urbaine'' is an urban cluster and its rim combined, or a statistical area describing a central urban core and its economic influence on surrounding municipalities.
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