Urban agglomeration

From Wikipedia, the free encyclopedia
Jump to: navigation, search
The Greater Tokyo Area, the world's largest urban agglomeration, with 38.4 million people.
An example of a bi-national urban agglomeration is the San Diego-Tijuana metropolitan area, creating a trans-border conurbation between the western United States and Mexico, respectively.

In the study of human settlements, an urban agglomeration is an extended city or town area comprising the built-up area of a central place (usually a municipality) and any suburbs linked by continuous urban area. INSEE, the French Statistical Institute, uses the term unité urbaine, which means continuous urbanized area. However, because of differences in definitions of what does and does not constitute an "agglomeration", as well as variations and limitations in statistical or geographical methodology, it can be problematic to compare different agglomerations around the world. It may not be clear, for instance, whether an area should be considered to be a satellite and part of an agglomeration, or a distinct entity in itself.

The term agglomeration is also linked to conurbation, which is a more specific term for large urban clusters where the built-up zones of influence of distinct cities or towns are connected by continuous built-up development (Essen - Dortmund and others in the Rhine-Ruhr district), even in different regions, states or countries, (Lille - Kortrijk in France and Belgium). Each city or town in a conurbation may nevertheless continue to act as an independent focus for a substantial part of the area.

Largest occurrences[edit]

The term "agglomeration" is more appropriate for determining the populations of large super-cities like Tokyo, New York City, Mexico City, Delhi, and Seoul. These examples are super-cities which have expanded enough to consume other neighborhoods. Although administration may be separate for outlying districts, the population might say they are from the central city.

The 25 largest agglomerations by population in March 2013, according to Demographia:[1]

Rank City Country Population
1 Tokyo-Yokohama  Japan 37,239,000
2 Jakarta (Jabotabek)  Indonesia 26,746,000
3 Seoul-Incheon  South Korea 22,868,000
4 Delhi  India 22,826,000
5 Shanghai  China 21,766,000
6 Manila (Mega Manila)  Philippines 21,241,000
7 Karachi  Pakistan 20,877,000
8 New York City  United States 20,673,000
9 São Paulo  Brazil 20,568,000
10 Mexico City  Mexico 20,032,000
11 Beijing  China 18,241,000
12 Guangzhou-Foshan  China 17,681,000
13 Mumbai  India 17,307,000
14 Osaka-Kyoto-Kobe  Japan 17,175,000
15 Moscow  Russia 15,788,000
16 Greater Cairo  Egypt 15,071,000
17 Los Angeles  United States 15,067,000
18 Kolkata  India 14,630,000
19 Bangkok  Thailand 14,544,000
20 Dhaka  Bangladesh 14,399,000
21 Istanbul  Turkey 13,854,740
22 Buenos Aires  Argentina 13,776,000
23 Tehran  Iran 13,309,000
24 Shenzhen  China 12,506,000
25 Lagos  Nigeria 12,090,000

See also[edit]

External links[edit]