A method of measuring the functional area of a city, including an urbanized area of 50,000+ inhabitants and surrounding areas
Core based statistical area (CBSA)
In the US, a collective term for all metropolitan statistical areas and micropolitan statistical areas
Concentric zone model
A model of the internal structure of cities in which social groups are arranged in rings
Greenbelt
A ring of land maintained for parks, agriculture, etc. to limit suburban sprawl
Redlining
A process by which banks draw lines on maps and refuse to lend money to purchase or improve property within certain boundaries
Annexation
Legally adding land area to a city in the US
Density gradient
The change in density in an urban area from the center to the periphery
Combined statistical area (CSA)
In the US, two or more core based statistical areas that are tied together by communicating patterns
Filtering
The division of large houses previously owned by one wealthy family into smaller apartments for lower-income families
Sector model
A model of the internal structure of cities in which social groups are arranged in a series of wedge-shaped sectors radiating from a central business district
