![]() Although the official INSEE translation of aire urbaine is "urban area", most North Americans would find the same as being similar in definition to their metropolitan area. In France, an urban area is a zone ( aire urbaine) encompassing an area of built-up growth (called an "urban unit" ( unité urbaine) - close in definition to the North American urban area) and its commuter belt ( couronne périurbaine). As for urban districts with a population density lower than 1,500 people per square kilometre, only the population that lives in streets, town sites, and adjacent villages is counted as urban population. In China, an urban area is an urban district, city and town with a population density higher than 1,500 people per square kilometre. The boundaries of an urban area are not influenced by municipal or even provincial boundaries. If two or more urban areas are within two kilometres of each other, they are merged into a single urban area. In Canada, an urban area is an area that has more than 400 people per square kilometre and has more than 1,000 people. In Australia, urban areas are referred to as "urban centres" and are defined as population clusters of 1000 or more people, with a density of 200 or more persons per square kilometre. Skyline of old downtown of São Paulo, Brazil. Urbanized areas are a more relevant statistic for determining per capita land usage and densities (Dumlao & Felizmenio 1976). Counties tend to be stable political boundaries economists prefer to work with economic and social statistics based on metropolitan areas. Metropolitan areas tend to be defined using counties or county sized political units as building blocks. ![]() In fact, urbanized areas agglomerate and grow as the core population/economic activity center within a larger metropolitan area or envelope. Unlike an urban area, a metropolitan area includes not only the urban area, but also satellite cities plus intervening rural land that is socio-economically connected to the urban core city, typically by employment ties through commuting, with the urban core city being the primary labor market. Measuring the extent of an urban area helps in analyzing population density and urban sprawl, and in determining urban and rural populations (Cubillas 2007). Urban areas are created and further developed by the process of urbanization. Urban areas may be cities, towns or conurbations, but the term is not commonly extended to rural settlements such as villages and hamlets. World map showing percent of population living in an urban environment.Īn urban area is characterized by higher population density and vast human features in comparison to areas surrounding it. In 1800, 3% of the world's population lived in cities, a figure that had risen to 47% by the end of the twentieth century. Urban areas with at least one million inhabitants in 2006. Greater Tokyo Area, the world's most populous urban area with about 35 million people. It has been suggested that ] be merged into this article or section.
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