Office of Management and Budget (OMB) for statistical purposes. In the United States, metropolitan statistical area (MSA) is defined by the U.S. In many countries, metropolitan areas are established either with an official organisation or only for statistical purposes. In addition to the city proper, a metropolitan area includes both the surrounding territory with urban levels of residential density and some additional lower-density areas that are adjacent to and linked to the city (e.g., through frequent transport, road linkages or commuting facilities). UNICEF defines metropolitan area as follows:Ī formal local government area comprising the urban area as a whole and its primary commuter areas, typically formed around a city with a large concentration of people (i.e., a population of at least 100,000). The satellite image shows that its urbanization has exceeded its city limits.Ī city can be defined by the inhabitants of its demographic population, as by metropolitan area, or labour market area. Tokyo is widely considered the world's largest city (by urban area and metropolitan area). An urban area can be defined by one or more of the following: administrative criteria or political boundaries (e.g., area within the jurisdiction of a municipality or town committee), a threshold population size (where the minimum for an urban settlement is typically in the region of 2,000 people, although this varies globally between 200 and 50,000), population density, economic function (e.g., where a significant majority of the population is not primarily engaged in agriculture, or where there is surplus employment) or the presence of urban characteristics (e.g., paved streets, electric lighting, sewerage).Īccording to Demographia, an urban area is a continuously built up land mass of urban development that is within a labor market (metropolitan area or metropolitan region) and contains no rural land. The definition of "urban" varies from country to country, and, with periodic reclassification, can also vary within one country over time, making direct comparisons difficult. See also: Number of urban areas by countryĪ city can be defined as a conditionally contiguous urban area, without regard to territorial or other boundaries inside an urban area. However, more than 70% of its 30-million population are actually agricultural workers living in a rural setting. The Chinese municipality of Chongqing, which claims the largest city proper in the world, comprises a huge administrative area of 82,403 km 2, around the size of Austria. Because of this definition, the city proper population figure may differ greatly with the urban area population figure, as many cities are amalgamations of smaller municipalities (Australia), and conversely, many Chinese cities govern territories that extend well beyond the traditional "city proper" into suburban and rural areas. The use of city proper as defined by administrative boundaries may not include suburban areas where an important proportion of the population working or studying in the city lives. Cities proper and their boundaries and population data may not include suburbs. UNICEF defines city proper as "the population living within the administrative boundaries of a city or controlled directly from the city by a single authority." A city proper is a locality defined according to legal or political boundaries and an administratively recognised urban status that is usually characterised by some form of local government. However, more than 70% of its residents live in rural areas.Ī city can be defined by its administrative boundaries ( city proper). The municipality of Chongqing, China, whose administrative area is around the size of Austria, has the largest population for a city proper.
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