Comprehensive Urban Geography and World Development Study Guide
Concepts of Urban Connectivity and Spatial Interaction
The Gravity Model * Definition: The gravity model is a mathematical formula used to predict the level of interaction between two cities based on their population size and the distance between them. * Function: It shows that the shorter the distance between two objects and the greater the mass of either (or both) objects, the greater the gravitational pull or interaction between them. * Mathematical Expression: The interaction between city and city can be represented as , where represents population and represents distance. * Connectivity Patterns: * Large Cities: Two large cities (e.g., New York and Los Angeles) will have high levels of interaction even if they are far apart because of their massive populations. * Medium and Small Cities: These cities are more likely to be connected to the nearest large urban hub rather than distant cities. A small town will have significant interaction with a nearby medium city but very little with a distant mega-city.
Urban Sprawl and Suburbanization * Urban Sprawl: This is the unrestricted, low-density growth of housing, commercial developments, and roads over large expanses of land, with little concern for urban planning. * Characteristics of Sprawl: * Heavy reliance on automobiles for transportation. * Separation of residential and commercial land uses (zoning). * Loss of agricultural land and open space. * Increased infrastructure costs for extending utilities like water and electricity. * Technological Catalysts: The development of urban sprawl was primarily driven by the invention of the internal combustion engine (automobile) and the creation of the Interstate Highway System. * Suburbanization: This refers to the movement of people from central urban areas to the outskirts (suburbs). In the United States, this process accelerated during the 1950s due to the GI Bill, the post-WWII housing boom, improved transportation, and the desire for larger homes and yards.
Defining the Urban Landscape * Urbanization: The process by which the percentage of people living in urban settlements increases, often driven by industrialization and rural-to-urban migration. * Edge City: A substantial cluster of office and retail space on the periphery of a large city, typically located near major highway intersections. They are characterized by more jobs than bedrooms. * Urban Area Content: The best definition of an urban area is a central city and its surrounding built-up suburbs that function as a single economic and social entity. * Site vs. Situation: * Site: The physical character of a place. Examples include climate, water sources, topography (e.g., San Francisco being hilly), soil quality, and vegetation. * Situation: The location of a place relative to other places or features. Examples include a city located at a crossroads (e.g., Singapore being situated along a major global trade route) or near a natural resource.
Urban Hierarchies and Market Theories
City Size Distributions * Primate City: A city that is much more than twice the size of the next largest city in the country and is the social, political, and economic center. Example: Paris, France or Mexico City, Mexico. * Rank-Size Rule: A pattern of settlements in a country where the largest settlement is the population of the largest settlement. Example: If the largest city has 12 million people, the 2nd largest would have 6 million (), and the 3rd largest would have 4 million (). This is common in the United States and Germany.
Central Place Theory * Description: Developed by Walter Christaller, this theory explains the distribution of services, based on the fact that settlements serve as centers of market areas for services. * Range: The maximum distance people are willing to travel to use a service. * Example: Low range for a convenience store (people won't travel far); high range for a professional sports stadium. * Threshold: The minimum number of people needed to support a service and keep it profitable. * Example: A grocery store requires a moderate threshold; a luxury jewelry store requires a high threshold of wealthy customers. * Comparative Analysis: Between a park, supermarket, hair salon, and museum, the museum would have the highest range and threshold. People travel globally to see world-class museums (range), and it requires a large population base to fund its operations and provide enough visitors (threshold).
Mega and Meta Cities * Mega City: A city with a total population of over people. * Meta City: A city with a total population of over people. * Geography of Growth: Most mega and meta cities are currently developing in the periphery and semi-periphery (LDCs and emerging economies), particularly in Asia and Africa. * Growth Drivers: Beyond natural increase (higher birth rates), these cities grow through massive rural-to-urban migration as people seek economic opportunities and better access to services.
World Cities and Global Economics * World City: A city that is a major center for finance, trade, and international politics (e.g., London, Tokyo). * Characteristics: Headquarters for multinational corporations, stock exchanges, and influential cultural institutions. * New York City: It is considered #1 because it hosts the United Nations, major global stock exchanges (NYSE, NASDAQ), and serves as a global hub for media, advertising, and finance. * Economic Centers: * Core: New York, London, Tokyo. * Semi-Periphery: Shanghai, Brazil's São Paulo, Mumbai.
Land Use and City Models
Zoning and Housing Density * Zoning: Legal regulations that control how land can be used (e.g., residential, industrial, commercial). It prevents industrial factories from being built next to residential homes. * High Density Housing: Structures like skyscrapers and high-rise apartments common in land-scarce areas. Hong Kong is a prime example. * Low Density Housing: Single-family homes with large yards. San Diego is a prime example due to its sprawling nature.
Internal City Structure * Central Business District (CBD): The "downtown" heart of the city, characterized by high land costs and high density. Businesses like major bank headquarters or high-end legal firms are located here. * Residential Patterns: In North American models, wealthy people traditionally lived farther away from the CBD to enjoy more space, while lower-income groups lived closer to industrial zones in the center. In many other world regions (Latin America, Europe), the wealthy often live near the center. * Bid-Rent Theory: Shows that the price and demand for real estate change as the distance from the CBD increases. Land costs are highest near the CBD and decrease as you move further out.
Classic City Models * Concentric Zone Model (Burgess): A model of the internal structure of cities in which social groups are spatially arranged in a series of rings. * Center Zone: CBD. * Transition Zone: Contains industry and poor-quality housing. * Working Class Zone: Modest older houses. * Sector Model (Hoyt): The city develops in a series of sectors or wedges based on environmental factors or transportation routes. * Multiple Nuclei Model (Harris & Ullman): A city includes more than one center around which activities revolve. The wealthiest residents want to live away from the industrial nodes and near the "high-class" residential nodes. * Latin American City Model (Griffin-Ford): Characterized by a central plaza and a commercial "spine" surrounded by the elite residential sector. * Southeast Asian City Model (McGee): Defined by an old colonial port serving as the central zone, rather than a traditional CBD.
Urban Development and Social Issues
Data in Urban Geography * Qualitative Data: Descriptive data, such as field notes, interviews, or narratives about how people feel about their neighborhood. * Quantitative Data: Numerical data. The U.S. Census is the best source of quantitative data collected in the United States every 10 years.
Discrimination and Decline * Blockbusting: A process by which real estate agents convince white property owners to sell their houses at low prices because of fear that persons of color will soon move into the neighborhood. * Redlining: A process by which financial institutions draw red-colored lines on a map and refuse to lend money for purchasing or improving property within the boundaries. It was discriminatory because it targeted minority neighborhoods, preventing wealth accumulation. * Zone of Abandonment: Areas that have been deserted in a city for economic or environmental reasons. This is often led by deindustrialization, lack of investment, and declining tax bases.
Sustainable and Modern Development * Transportation Oriented Development (TOD): A type of urban development that maximizes the amount of residential, business, and leisure space within walking distance of public transport. Example: High-density apartments built directly above a subway station. * Mixed-Use Development: Urban development that blends residential, commercial, cultural, or institutional uses into one space. Example: A building with a grocery store on the first floor and apartments on the upper floors. * Planned Capitals (Forward Capitals): Periphery/semi-periphery countries build new capitals to shift the population center and encourage economic development in the interior (e.g., Brasilia, Brazil). * Squatter Settlements: Areas in any city where people establish residences on land they do not own or rent. This occurs due to rapid urbanization outpacing the supply of affordable housing. They are most common in periphery countries (LDCs).
Economics and Development (Unit 7)
Economic Structures * Agglomeration: The clustering of productive activities and people for mutual advantage. Example: Tech companies clustering in Silicon Valley or car dealerships clustering on one street. * Vertical Integration: When a company controls multiple stages of production (e.g., a furniture company owning the forests, the sawmill, and the retail stores). It helps a company financially by reducing costs and ensuring a steady supply of materials. * Economic Sectors: * Primary: Extraction of raw materials (Agriculture, Mining). * Secondary: Processing/Manufacturing (Factories, Construction). * Tertiary: Services (Retail, Banking, Education).
Measuring Development * GDP & World System Theory: Gross Domestic Product (GDP) is used as a measure of a country's economic size. Per Wallerstein's World System Theory, Core countries have high GDPs and dominate the world economy, while Periphery countries have low GDPs and provide raw materials. * Human Development Index (HDI): A score used to rank countries based on development. It is calculated using three dimensions: 1. Life expectancy at birth (Health). 2. Mean years of schooling and expected years of schooling (Education). 3. Gross National Income (GNI) per capita (Standard of Living). * Health and Sustainable Development: High birth rates and high infant mortality rates (IMR) are indicators of low development. Sustainable development goals aim to reduce IMR and provide healthcare to stabilize population growth.
Rostow’s Stages of Development (Modernization Model) 1. Stage 1: Traditional Society: Economy based on subsistence agriculture. 2. Stage 2: Preconditions for Take-off: Elite group initiates economic innovation; investment in infrastructure. 3. Stage 3: Take-off: Rapid growth in a few industries (like textiles or food). 4. Stage 4: Drive to Maturity: Modern technology diffuses to a wide variety of industries; workers become more skilled. 5. Stage 5: High Mass Consumption: The economy shifts from heavy industry to consumer goods (like cars and appliances).