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A periphery, (''Fr: couronne'') is an INSEE (French demographic statistics institution) statistical area〔(Definitions and methods: Periphery )〕 designating a commuter belt around an urban unit (''Fr: unité urbaine''). Together these complete the INSEE urban area statistical area. Based on France's ''commune'' system (interlocking administrative subdivisions often comparable to civil parishes, towns or cities), a commune is considered part of a couronne when # it is not densely constructed enough or is too isolated to be part of any ''unité urbaine'' (or "''pôle urbain''" if it is the core of the agglomeration), and # at least 40% of its population commutes to workplaces in a ''unité urbaine'' or ''pôle urbain'', or to another commune connected to a ''unité urbaine'' through the same criteria. ==References== 〔 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Periphery (France)」の詳細全文を読む スポンサード リンク
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