Map visualisation service (WMS) of the dataset: Urban area from Urban Unit according to INSEE 2008 in the Somme

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 a set of municipalities with a continuous built-up area (no cut of more than 200 meters between two buildings) that has at least 2,000 inhabitants.If the urban unit is located in a single municipality, it is called 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 called a multi-communal agglomeration. 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 a set of municipalities with a continuous built-up area (no cut of more than 200 meters between two buildings) that has at least 2,000 inhabitants.If the urban unit is located in a single municipality, it is called 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 called a multi-communal agglomeration.