AP Human Geography: Urban Geography and Land Use

Comprehensive vocabulary flashcards covering the concepts, models, patterns, and challenges of urban sustainability, structure, and changes in AP Human Geography.

Site Factors

The physical and absolute characteristics of a settlement's location, including climate, landforms, availability of water, and soil fertility.

Situation Factors

The connections between sites and the relative location of a place in reference to other features, which often dictates the function and growth of a city.

Borchert's Epochs of American Urbanization

A historical framework dividing American urban growth into distinct stages based on transportation and communication innovations: Sail-Wagon Epoch (1790–1830), Iron Horse Epoch (1830–1870), Steel Rail Epoch (1870–1920), and Auto-Air-Amenity Epoch (1920–present).

Forward Capital

A capital city deliberately relocated—frequently in former colonies—away from congested, peripheral coastal ports to interior regions with improved infrastructure, such as Brasilia replacing Rio de Janeiro.

Megacity

A metropolitan statistical area containing a total population of more than $10\text{ million}$ people, increasingly found in semi-periphery and periphery regions of Asia and Africa.

Metacity

A massive urban agglomeration containing a total population of more than $20\text{ million}$ people.

Suburbanization

The movement of people from dense city centers into residential communities on the periphery of metropolitan areas, facilitated by automobile ownership, highways, and programs like the GI Bill.

Edge Cities

Concentrations of commercial centers, office parks, retail complexes, and urban amenities located on the outskirts of major cities near highway corridors that are predominantly non-residential.

Boomburbs

Rapidly growing suburban cities that have expanded into sprawling communities exceeding $100{,}000$ residents, retaining a suburban feel while rivaling the population size of traditional cities.

Exurbs

Low-density, semi-rural residential communities established beyond the edge of traditional suburbs that maintain a weak functional link to the urban core.

World Cities

Influential cities situated at the pinnacle of the global urban hierarchy that function as international nodes of political power, corporate headquarters, financial banking centers, and global cultural diffusion.

Urban Hierarchy

A ranking of settlements based on population size, economic functions, and the complexity and quantity of services provided, descending from global cities down to hamlets.

Rank-Size Rule

A statistical distribution principle stating that the $n$-th largest city in a country will have $\frac{1}{n}$ the population of the largest city, typically reflecting balanced, dispersed economic development.

Primate City

A single dominant city within a state that possesses more than twice the population of the second-largest city alongside an overwhelming concentration of cultural, economic, and political influence.

The Gravity Model

A spatial model predicting that the volume of interaction, trade, and movement between two cities is directly related to their population sizes and inversely related to the distance separating them.

Christaller's Central Place Theory

A geographic model that utilizes nesting hexagonal market areas to explain the spatial distribution, size, spacing, and economic functions of cities and settlements.

Threshold

The minimum number of customers or population needed to economically support and sustain a specific business, good, or service.

Range

The maximum spatial distance a consumer is willing to travel in order to purchase or obtain a good or service.

High-Order Goods and Services

Specialized, unique, or expensive offerings—such as universities, specialized hospitals, and professional sports arenas—that require a large threshold and possess an expansive range.

Low-Order Goods and Services

Inexpensive, everyday goods and basic services—such as grocery stores and gas stations—characterized by small thresholds and limited ranges.

Bid-Rent Theory

An economic concept stating that land prices and competition peak in close proximity to the central business district (CBD) and decrease as distance from the urban center increases.

Burgess Concentric-Zone Model

A 1920s model based on Chicago describing urban structural growth radiating outward from a Central Business District in five successive concentric rings.

Hoyt Sector Model

An urban land-use model in which growth develops along rail lines and major transportation corridors, forming wedge-shaped sectors radiating outward from the central core.

Harris and Ullman Multiple-Nuclei Model

An urban model asserting that metropolitan growth does not originate around a single CBD, but rather develops around several specialized, independent nodes and activity centers.

Galactic City Model

A post-industrial urban model developed in the 1980s depicting a decentralized city encircled by a beltway or ring road dotted with edge cities, offices, and suburban retail nodes.

Latin American City Model

An urban model combining concentric and sector patterns featuring a commercial 'spine' connecting the CBD to a secondary mall, flanked by elite housing, with squatter settlements and disamenity zones located at the periphery.

African City Model

An urban structure model characterized by three distinct Central Business Districts: a traditional CBD, a European colonial grid CBD, and an open-air market zone.

Southeast Asian City Model

An urban model centered on an export-oriented colonial port zone rather than a formal CBD, accompanied by an alien commercial zone, a Western commercial sector, and market gardening belts.

Infilling

The redevelopment or construction of new buildings on vacant, underutilized, or abandoned plots of land located within existing built-up urban fabrics.

Zoning

Municipal regulatory bylaws that govern and designate permitted land uses (residential, commercial, or industrial) and building constraints across specific urban sectors.

Infrastructure

The underlying foundational systems—such as roads, water networks, electrical grids, public transit, schools, and hospitals—necessary to sustain society and economic production.

Smart Growth

An urban planning approach dedicated to curbing sprawling outward growth, conserving open land, and encouraging mixed-use, transit-friendly, and walkable urban environments.

Mixed-Use Development

Urban zoning and architectural design that blends multiple functional purposes—residential units, retail storefronts, offices, and recreational areas—within single structures or compact districts.

Walkability

An urban planning design standard that prioritizes dedicated sidewalks, pedestrian paths, and bike lanes to enable residents to safely reach commercial and community destinations without an automobile.

Transportation-Oriented Development

Urban design focusing high-density residential and commercial developments within immediate walking distance of public mass-transit hubs such as bus terminals and light-rail stations.

Greenbelts

Rings of protected open countryside, agricultural land, or forests preserved around cities to prevent continuous urban sprawl and preserve natural habitats.

Slow-Growth Cities

Municipalities that actively apply growth-management boundaries, zoning restrictions, and permits to decrease the rate of outward expansion and control development.

Qualitative Data

Descriptive, non-numerical research data collected through personal interviews, open-ended questionnaires, field observations, and narratives to study individual perceptions and experiences.

Quantitative Data

Measurable, numerical information—such as government census figures, population statistics, and survey indices—utilized to analyze urban trends, demographics, and sizes.

Redlining

An illegal financial practice originating in the 1930s wherein lending institutions drew red boundaries on maps to deny mortgages and loans to neighborhoods predominantly populated by racial minorities.

Blockbusting

A discriminatory real estate tactic where agents frightened white homeowners into selling properties below market value by claiming minority families were moving into the area, subsequently selling the houses at inflated prices.

Food Deserts

Urban or rural districts where low-income residents lack convenient access to grocery stores selling affordable, nutritious, and fresh food products.

Disamenity Zones

Vulnerable urban areas with perilous terrain (e.g., steep ravines or floodplains) that lack municipal utilities and suffer from extreme poverty, structural neglect, and crime.

Zones of Abandonment

Districts within cities characterized by vacant, boarded-up, and decaying structures due to economic disinvestment, falling property values, and job losses.

Squatter Settlements

Informal residential settlements erected from scavenged materials on hazardous or public land lacking legal title and municipal infrastructure, often called favelas, barrios, or slums.

Land Tenure

The formal legal right, terms, and recognition under which individuals or communities own, hold, and use land parcels.

Inclusionary Zoning

Municipal planning mandates that require real estate developers to dedicate a specific percentage of housing units for low- and moderate-income residents as a condition for receiving permits.

Urban Renewal

Post-WWII government-sponsored redevelopment projects that used federal subsidies and eminent domain to demolish blighted urban districts and build highways, civic institutions, or new complexes.

Gentrification

The economic and physical revitalization of blighted or lower-income inner-city neighborhoods by higher-income residents and commercial developers, often driving up property values and displacing existing inhabitants.

Functional and Geographic Fragmentation of Governments

The division and dispersal of authority, resources, and jurisdictions across multiple layers of state, county, city, township, and neighborhood governance, complicating coordinated metropolitan problem-solving.

Ecological Footprint

A measurement of environmental impact using land area as currency to compare the rate at which human populations consume natural resources and generate waste with nature's regenerative capacity.

Global Hectares (gha)

A standardized unit of measurement representing the biologically productive capacity of $1\text{ hectare}$ of land with world average biological productivity.

Primary Energy

Energy captured directly from raw natural resources—such as coal, crude oil, or uranium—prior to any conversion, processing, or loss incurred during electricity generation and delivery.

Brownfield

An abandoned, idle, or vacant industrial or commercial facility whose redevelopment or reuse is complicated by real or perceived environmental contamination and pollution.

Urban Growth Boundary (UGB)

A legally established geographic border drawn around a metropolitan area to confine outward development, encourage compact internal density, and preserve surrounding agricultural land.