Urban areas are measured for various purposes, including analyzing population density and urban sprawl.
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.
The ten largest metropolitan areas account for half of the population, and fewer than one in ten live in rural areas.
Seven other provinces have over one million people each: Mendoza, Tucumán, Entre Ríos, Salta, Chaco, Corrientes and Misiones.
Tucumán is the most densely populated with 60 per square kilometre (160/sq mi), the only Argentine province more densely populated than the world average, while the southern province of Santa Cruz has around 1 inhabitant per square kilometre (2.6/sq mi).
The Randstad is the country's largest conurbation located in the west of the country and contains the four largest cities: Amsterdam, Rotterdam, The Hague, and Utrecht.
The Randstad has a population of 7 million inhabitants and is the 6th largest metropolitan area in Europe.
There are three classes of urban area: main urban areas are the 17 urban areas which have a population of 30,000 or more; secondary urban areas are the 14 urban areas which have a population of 10,000 or more but less than 30,000, and minor urban areas are the 103 urban areas which have a population of 1,000 or more but less than 10,000.
Urban areas are reclassified after each New Zealand census, so population changes between censuses does not change an urban area's classification. 14,650) is still classified as a minor urban area because its population was under 10,000 at the 2013 Census.
Despite the change in terminology, however, the demographic definition of a population centre remains unchanged from that of an urban area: a population of at least 1,000 people where the density is no fewer than 400 persons per km In Colombia the largest Metropolitan area is Bogotá's, which has around 9.8 million of inhabitants and includes municipalities like Cota, La Calera, Chía, Soacha, Usaquen, Suba among others.., it's the metropolis of Culture, Business and Literature, Bogotá has been the International City of the Book and has places uniques like Monserrate, Torre Colpatria, Bolivar Square, BD Bacatá, Corferias, National University etc.
Today, China has dozens of cities with one million or more long-term residents, including the three global cities of Beijing, Hong Kong, and Shanghai; by 2025, the country will be home to 221 cities with over a million inhabitants.
The Population Division of the United Nations Department of Economic and Social Affairs at that time predicted the urban population would grow to 6.4 billion by 2050, with 37% of that growth to come from three countries: China, India and Nigeria.