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An urban area [a] is a human settlement with a high population density and an infrastructure of built environment. This is the core of a metropolitan statistical area in the United States, if it contains a population of more than 50,000. [2] Urban areas originate through urbanization, and researchers categorize them as cities, towns ...
CBSAs are delineated on the basis of a central contiguous area of relatively high population density, known as an urban area. The counties containing the core urban area are known as the "central counties" of the CBSA; these are defined as having at least 50% of their population living in urban areas of at least 10,000 in population. [8]
Metropolitan areas in the United States are delineated around the core of a core based statistical area which is defined as an urban area, (this is different than the urban core) and consists of central and outlying counties, as the terms central city and suburb are no longer used by the census bureau due to suburbanization of employment.
The United States Census Bureau defines an Urbanized Area to be "one or more places ('central place') and the adjacent densely settled surrounding territory ('urban fringe') that together have a minimum of 50,000 persons."
Urbanized areas were previously defined as urban areas with at least 50,000 residents, and urban clusters were urban areas with less than 50,000. All qualifying areas are now designated as urban areas. The use of housing unit density as an alternative minimum for inclusion: either 2,000 housing units or a population of 5,000 may qualify an area ...
In urban planning, a historic core city or central city is the municipality with the largest 1940 population in the present metropolitan area (metropolitan statistical area). [ 1 ] [ 2 ] This term was retired by the US census bureau and replaced by the term principal city , which can include historic core cities and post-WWII cities.
Activity centre is a term used in urban planning and design for a mixed-use urban area where there is a concentration of commercial and other land uses. For example, the central business districts of cities (CBD) are also known as “Central Activities Districts” (CAD) (also known as Downtown in North America or "Central Activities Zone" in the United Kingdom, in recognition of the fact that ...
Central place theory is an urban geographical theory that seeks to explain the number, size and range of market services in a commercial system or human settlements in a residential system. [1] It was introduced in 1933 to explain the spatial distribution of cities across the landscape. [ 2 ]