Urban area
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An urban area is a human settlement with a high population density and an infrastructure of built environment. Urban areas originate through urbanization, and researchers categorize them as cities, to
Skyline of Seoul at night
Aerial view of Greater Adelaide, the parklands serve as a barrier between the inner CBD and encompassing urban area
A satellite view of the U.S. Northeast megalopolis at night, the world's most economically productive megalopolis with over 50 million residents, centered on New York City
Greater São Paulo at night, as seen from the International Space Station
Conurbation
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A conurbation is a region consisting of a number of metropolises, cities, large towns, and other urban areas which, through population growth and physical expansion, have merged to form one continuous
Skyscrapers of Seoul, South Korea
Nocturnal view of the New York metropolitan area, the world's most brightly illuminated conurbation and largest urban landmass. Long Island extends 120 miles eastward from Manhattan, the central core of the conurbation.
Satellite photo from 2012 showing Sydney in the center with Wollongong on the left and the Central Coast on the right