Urban area
A densely populated region with many buildings and infrastructure such as Denver.
Metropolitan area
A city and its surrounding suburbs that are socially and economically connected such as the Denver metro area including Aurora and Lakewood.
Site
The physical characteristics of the place where a city is located such as New York developing on a natural harbor.
Situation
A city’s location relative to other places and resources such as Chicago growing because it is near the Great Lakes.
Urban sprawl
The uncontrolled expansion of cities into surrounding rural land such as suburbs spreading far outside Phoenix.
Urbanization
An increase in the percentage of people living in cities such as people moving from rural areas to cities in China.
Suburbanization
The movement of people from cities to surrounding suburbs such as families moving from downtown Denver to suburban neighborhoods.
Edge city
A large suburban center with offices, shopping, and entertainment such as Tyson’s Corner near Washington, DC.
Boomburbs
Fast-growing suburbs with large populations but no traditional downtown such as Mesa, Arizona.
Exurbs
Communities beyond the suburbs where people live but commute into cities for work such as people living far outside Denver and driving into the city.
Telecommuting
Working remotely from home using the internet instead of commuting such as someone living in a rural area but working online for a company in a city.
Infill
Developing unused land within an existing urban area such as building apartments on an empty lot downtown.
Basic industry
Industries that sell goods outside the city and bring money into the local economy such as a factory exporting cars worldwide.
Non-basic industry
Businesses that serve the local population and circulate money within the city such as grocery stores or hair salons.
Gravity Model (applied to urbanization)
A model predicting interaction between places based on population size and distance meaning larger cities attract more migration and trade than smaller towns.
Rank-Size Rule
A pattern where city sizes follow a ranking where the second-largest city is about half the size of the largest as seen in the United States.
Primate city
A city that is much larger and more influential than other cities in a country such as Paris in France.
Central Place Theory
A theory explaining how cities are spaced to provide goods and services to surrounding areas with small towns offering basic goods and large cities offering specialized services.
Threshold
The minimum number of customers needed to support a business such as a luxury car dealership needing many wealthy buyers nearby.
Range
The maximum distance people are willing to travel for a service such as traveling farther for a hospital than for a grocery store.
Megacity
A city with more than 10 million people such as Tokyo.
Metacity
A massive urban area with more than 20 million people such as Tokyo or Delhi.
Megalopolis
A chain of connected metropolitan areas forming one large urban region such as the BosWash corridor from Boston to Washington DC.
World cities
Cities that have major influence over global economic systems such as New York, London, and Tokyo.