quality:correction, information:extraction
Urbanization

Based on commuting patterns, OECD and Eurostat define eight metropolitan areas of Portugal. Only two have populations over 1 million, and since the 2013 local government reform, these are the only two which also have administrative legal status of metropolitan areas: Lisbon and Porto, Several smaller metropolitan areas (Algarve, Aveiro, Coimbra, Minho and Viseu) also held this status from 2003 to 2008, when they were converted into intermunicipal communities, whose territories are roughly based on the NUTS III statistical regions.