Map Viewing Service (WMS) of the dataset: 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

法国国家统计与经济研究所（Institut national de la statistique et des études économiques，简称INSEE）的分区单元，由单个市镇或多个市镇组合而成，其辖区内包含至少2000名居民的建成区域，且区内任意住宅与相邻最近住宅的间距不超过200米。此外，相关市镇的半数以上人口均居住于该建成区域内。

城市连片建成区（urban unit）的概念以建筑连续性与居住人口规模为核心判定依据。城市连片建成区指由单个或多个市镇组成的区域，其建成区连续连贯（两栋建筑之间的间距不超过200米）且居住人口不少于2000人。

若该城市连片建成区仅位于单个市镇的辖区范围内，则称之为“孤立城市”；若其跨越多个市镇，且每个相关市镇均有半数以上人口集中于该连续建成区内，则称之为“多市镇集聚区”。

“城市连片建成区规模”代码（基于2010年城市连片建成区对应的2007年市镇人口普查数据）：
0- 乡村区域
1- 人口2000至4999人的城市连片建成区
2- 人口5000至9999人的城市连片建成区
3- 人口10000至19999人的城市连片建成区
4- 人口20000至49999人的城市连片建成区
5- 人口50000至99999人的城市连片建成区
6- 人口100000至199999人的城市连片建成区
7- 人口200000至1999999人的城市连片建成区
8- 巴黎集聚区

“城市连片建成区类型”代码：
0- 省域乡村市镇单元
1- 孤立城市或单市镇城市连片建成区
2- 省域内集聚区
3- 跨省集聚区
4- 跨大区集聚区
5- 跨国集聚区