The size of population necessary for any particular service to exist and remain profitable. Services with a low threshold are very common and present in even the smallest central places. Services with higher thresholds required a larger population to survive.
The portion of the economy that is not taxed, regulated, or managed by the government.
Areas of poverty occupied by a minority group as a result of discrimination.
A city that exists on the fringes of a larger city and acts as a regional hub for recreation, business, or other community activity for the suburban population of the larger city.
A chain of interconnected cities.
An urban model that describes the spread of US cities outward from the CBD to the suburbs, leaving a declining inner city.
Sites of abandoned factories; a property which has the potential to be a hazardous waste, pollutant, or contaminant.
Neighborhoods with a mix of residential and commercial buildings (not separated into zones).
Unplanned slum developments on the margins of cities, dominated by crude dwellings and shelters made of found materials.
The idea that zones or regions of an urban area have specific and distinct purposes.
The permanently inhabited portion of the earth’s surface.
A symbolically relocated capital city, usually for economic or strategic reasons.
The process of wealthier residents moving into a neighborhood, making it unaffordable for existing residents.
Large cities that have more than 20 million residents.
Settlements in which people living there do not have a legal right to the land or property and are living there illegally.
The change in the use of a house from a single-family home to rented units in a multifamily dwelling to eventual abandonment.
Areas of undeveloped land around an urban area.
Deterioration of an urban area due to age or neglect.
A community where there is no access to fresh, healthy, affordable food options because there is a lack of food or grocery stores or farmers markets.
Renovating a site by removing the existing landscape and building from the ground up.
A place where there is a relative concentration of people.
Hoyt's model that is arranged in a series of sectors or wedges that radiate out from the CBD. Low-income housing sectors are located beside the industrial transportation zones and middle and high income sectors are located away from them.
Walled or fenced neighborhoods with limited access
The commercial heart of a city that is the focal point of transportation and services.
The ongoing process of developing towns and cities.
The process of people moving, usually from cities, to residential areas on the outskirts of cities.
Streets lined with tall buildings that can channel and intensify wind and prevent natural sunlight from reaching the ground.
Areas not connected to city services and under the control of drug lords and gangs, often located in physically unsafe locations like mountain slopes.
A set of policies in the US to preserve farmland and other open, undeveloped spaces near a city.
The population of a town or city will be inversely proportional to its rank in the urban hierarchy. The second-largest city will be half the population of the first largest, the third-largest will be a third of the population of the first largest, etc.
An interdependent set of cities within a region.
A city that has more than 10 million residents.
An established town near a very large city that grows into a city independent of the larger one.
An urban model that reflects the impact of colonization in Africa, with new cities being built next to or on top of old ones. Includes both a traditional CBD and a colonial CBD and residential zones often based on ethnicity.
A movement in urban planning that emerged in the 1990s with goals including reducing urban sprawl, increasing affordable housing, and creating livable neighborhoods.
The movement of suburbanites further out into rural areas.
Relatively small, ethnically homogenous communities situated within a larger and more diverse cultural context.
Places that are larger and closer together will have more interaction (flow of people and goods) than places that are smaller and farther away from each other.
Segregation of people that happens “by fact” rather than by law.
The process of building up underused lands within a city.
An urban model in which the focus of the city is the port zone. There is both an alien and a western commercial zone and a belt of market gardening surrounds the city, with industry and manufacturing beyond that.
Urban centers that were shaped by the distances people could walk.
If the largest city in an urban system is more than twice as large as the next largest city, the largest city is said to have primacy.
The outlying towns and small communities that rely on the central city for goods and services.
An urban model that is a mixture of radial sectors and concentric zones and reflects Latin American culture and the influence of globalization. It includes a CBD with a commercial spine and the equality of housing decreases as one moves outward from the CBD.
The price and demand for real estate changes based on the distance from the central business district. Land closer to the CBD is more expensive since there is less of it.
Laws allowing the government to seize land for public use after paying owners market value.
A model that describes urban growth based on transportation technology and suggests that each new form of technology produced a new transportation system that changed how people moved in and between urban areas.
A city that exerts influence far beyond its national boundaries.
A theory proposed by Walter Christaller that explains how services are distributed and why a regular pattern of settlements exists. Every central place is surrounded by a market area it services.
An urban model where a city grows from several independent points rather than a single CBD, and as they expand, they merge to form a single urban area.
A suburban area experiencing significant growth in population and prosperity.
The distance people will travel to obtain specific goods or services.
A collection of adjacent cities across which population density is high and continuous.
When people of one ethnic group are frightened into selling their homes at low prices when they hear a family of another race or ethnicity is moving in.
When a chain of cities grows until they merge into a single uninterrupted area.
Sparsely populated places away from the influence of large cities.
Burgess' model, where the city is structured as a series of rings around the Central Business District, with housing getting larger and more expensive the farther away it is from the center.
A place with a permanent human population.
The process by which bands refuse loans to those who wanted to purchase and improve properties in certain urban areas.
The rapid spread of development outward from the city.
African Cities Model
Bid-Rent Theory
Blockbusting
Boomburb
Borchert’s Model of Urban Growth
Brownfield
Central Business District
Central Place Theory
City
Concentric Zone Model
Conurbation
De Facto Segregation
Disamenity Zone
Ecumene
Edge City
Eminent Domain
Ethnic Enclave
Exurbanization
Filtering
Food Desert
Forward Capital
Galactic City Model
Gated Community
Gentrification
Ghettos
Gravity Model
Greenbelts
Hinterland
Infill
Informal Economy
Latin American Cities Model
Megacity
Megalopolis
Metacity
Metropolitan Area
Mixed-Use Neighborhood
Multiple Nuclei Model
New Urbanism
Pedestrian Cities
Primate City Rule
Range
Rank-Size Rule
Redlining
Rural
Satellite City
Sector Model
Settlement
Shantytown
Smart Growth
Southeast Asian Cities Model
Squatter Settlement
Suburbanization
Threshold
Urban Canyon
Urban Decay
Urban Redevelopment
Urban Sprawl
Urban System
Urbanization
World City
Zoning
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