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According to the definition by the Office for National Statistics, "Built-up areas are defined as land which is 'irreversibly urban in character', meaning that they are characteristic of a town or city. They include areas of built-up land with a minimum of 20 hectares (200,000 m 2; 49 acres). Any areas [separated by] less than 200 metres [of ...
In 1930, the concept of specific regulation for roads within built-up areas appears. It defines the road as a road within built-up area if some system of street lighting exists at less than 200 yards (183 meters) from that road, unless decided other way by the local authority and written on traffic signs.
the definition follows a ‘bricks and mortar’ approach, with areas defined as built-up land with a minimum area of 20 hectares (200,000 m 2), while settlements within 200 metres of each other are linked. Built-up area sub-divisions are also identified to provide greater detail in the data, especially in the larger conurbations. [1] In ...
In 2015, more than 11% of built-up areas globally faced high or very high flood risk, meaning areas at risk of flooding depths of at least 50 cm (17 inches) during 1-in-100-year flooding events ...
In France, an urban unit (French: unité urbaine) is a statistical area defined by INSEE, the French national statistics office, for the measurement of contiguously built-up areas. According to the INSEE definition , an "unité urbaine" is a commune alone or a grouping of communes which: a) form a single unbroken spread of urban development ...
Since urban areas are composed of census blocks and not cities, counties, or county-equivalents, urban area boundaries may consist of partial areas of these political units. Urban areas are distinguished from rural areas: any area not part of an urban area is considered to be rural by the Census Bureau. The list in this article includes urban ...
In Chicago, a typical city block is 330 by 660 feet (100 m × 200 m), [2] meaning that 16 east-west blocks or 8 north-south blocks measure one mile, which has been adopted by other US cities. In much of the United States and Canada, the addresses follow a block and lot number system , in which each block of a street is allotted 100 building ...
The official definition of each area does not necessarily follow the actual extent of continuous urbanization. For example, the built-up area of Metro Manila has long spilled out of its officially defined borders into the adjacent provinces of Bulacan, Rizal, Laguna, and Cavite known as Greater Manila Area. The number of metropolitan areas in ...