Urban unit according to INSEE in France

INSEE zoning comprising a commune or a group of municipalities which includes in its territory a built-up area of at least 2,000 inhabitants where no dwelling is separated from the nearest to more than 200 metres. In addition, each municipality concerned has more than half of its population in this built-up area. The concept of urban unity is based on the continuity of the building and the number of inhabitants. An urban unit is a municipality or group of municipalities with a continuous building area (no cut-off of more than 200 metres between two buildings) with at least 2,000 inhabitants. If the urban unit is located in a single municipality, it is referred to as an isolated city. If the urban unit extends over several municipalities, and each of these municipalities concentrates more than half of its population in the continuous built-up area, it is referred to as a multi-communal agglomeration. Code “size of the urban unit” (based on the municipal population in the 2007 census for UU 2010): 0-Rural 1-Urban units from 2 000 to 4 999 inhabitants 2-Urban units from 5,000 to 9,999 inhabitants 3-Urban units from 10,000 to 19,999 inhabitants 4-Urban units from 20,000 to 49,999 inhabitants 5-Urban units from 50,000 to 99,999 inhabitants 6-Urban units from 100,000 to 199 999 inhabitants 7-Urban units from 200 000 to 1,999 999 inhabitants 8-Agglomeration of Paris Code “Urban unit type” 0-Unit of rural municipalities of the department 1-Single city or single-community urban unit 2-Intra-departmental agglomeration 3-Inter-departmental agglomeration 4-Interregional agglomeration 5-International agglomeration