What is the primary difference between the Burgess Concentric Zone Model and the Hoyt Sector Model?

The Burgess model organizes land use in uniform rings expanding from the center, while the Hoyt model organizes land use in wedges or sectors that follow transportation corridors like railroads.

How does the Galactic City Model differ from the Multiple Nuclei Model?

While both feature multiple centers, the Galactic City Model specifically represents a post-industrial city where the CBD is decentralized and surrounded by suburbs and 'edge cities' linked by a beltway.

How does the distribution of wealth in the Latin American City Model compare to the Burgess Model?

In the Latin American model, the wealthiest residents live in the center and along a commercial spine, while in the Burgess model, the wealthiest residents typically live in the outer commuter zone.

What is a common error when applying the Burgess Concentric Zone Model to modern cities?

The error is assuming cities still grow in perfect circles; modern urban areas are heavily influenced by highways, varied topography, and the decentralization of jobs to the suburbs.

Why is it incorrect to assume every city has a single, clearly defined Central Business District (CBD)?

Many modern cities are polycentric, meaning they have multiple 'nuclei' or nodes of activity, such as business parks or edge cities, that function independently of the original downtown.

What mistake do students often make regarding the 'zone of transition' in the Burgess model?

Students often forget that this zone is characterized by a mix of industry and low-quality housing, serving as a temporary entry point for immigrants and low-income workers.

Define the 'Central Business District' (CBD).

The CBD is the nucleus of a city where retail, office, and cultural activities are concentrated, characterized by high land values and high building density.

What is an 'Edge City'?

An edge city is a relatively large node of consumer and business services located on the periphery of an urban area, typically near major highway intersections.

What are 'Squatter Settlements'?

These are residential areas on the periphery of cities in developing countries where people build dwellings on land they do not own, often lacking basic services like water and electricity.

What does Bid-Rent Theory predict about land use?

It predicts that land price decreases as distance from the CBD increases, leading to a hierarchy where retail is at the center, followed by industry, and then residential use.

Internal Structure of Cities | College Board AP Geography

Cities & Urban Land-Use Patterns & Processes

Internal Structure of Cities

Summary

The internal structure of cities is explained through various spatial models that describe how different social, economic, and functional groups are distributed within urban areas. These models have evolved from simple monocentric patterns to complex polycentric and regional-specific frameworks, driven by changes in transportation, economic shifts, and cultural contexts.

1. Classical Monocentric Models

The Burgess Concentric Zone Model suggests that cities grow outward from a central point in a series of five rings. It posits that the Central Business District (CBD) is the core, followed by a zone of transition (industry/poor housing), working-class homes, better residences, and finally a commuter zone.

The Hoyt Sector Model modifies the concentric approach by proposing that cities develop in wedges or sectors rather than perfect rings. This model emphasizes the role of transportation corridors, such as railroads or highways, which cause similar land uses to extend outward from the center in linear patterns.

Both models are criticized for being based on early 20th-century industrial cities like Chicago and failing to account for modern phenomena like decentralization and the widespread use of personal automobiles.

2. Polycentric and Post-Industrial Models

The Harris and Ullman Multiple Nuclei Model recognizes that modern cities often have more than one center of activity. These nodes (such as airports, universities, or ports) attract specific types of land use and populations, making the CBD less dominant than in earlier models.

The Galactic City Model represents the post-industrial era, where the central city is surrounded by vast suburban areas and edge cities. In this framework, industrial activities move to the periphery, and the entire urban area is interconnected by complex transportation nodes and beltways.

Bid-Rent Theory graph showing how different land uses (Retail, Industry, Residential) compete for space based on distance from the CBD.

3. Regional Urban Models

The Latin American City Model is characterized by a thriving CBD and a prominent commercial spine surrounded by elite residential sectors. As one moves further from the center, housing quality decreases, ending in peripheral squatter settlements.

The Sub-Saharan African City Model is unique for featuring three CBDs: a colonial center (vertical growth), a traditional center (market-based), and a formal market zone. It often retains ethnic neighborhoods reflecting the history of colonization.

The Southeast Asian City Model focuses on a port zone rather than a traditional CBD. It features a complex mix of commercial and industrial sectors disaggregated across the city, often with a strong emphasis on international trade.

4. Economic Foundations: Bid-Rent Theory

5. Key Distinctions

6. Exam Strategy & Tips

Internal Structure of Cities

Summary

1. Classical Monocentric Models

2. Polycentric and Post-Industrial Models

Bid-Rent Theory graph showing how different land uses (Retail, Industry, Residential) compete for space based on distance from the CBD.

3. Regional Urban Models

4. Economic Foundations: Bid-Rent Theory

Bid-Rent Theory explains the price and demand for real estate as the distance from the CBD increases. It states that different users will bid different amounts for land depending on its accessibility to the city center.

Commercial activities (retail and offices) are willing to pay the highest rent for central locations to maximize customer access. Industrial users require more space and prefer locations slightly further out with good transport links, while residential users occupy the furthest periphery where land is cheaper.

5. Key Distinctions

Model	Primary Driver	Key Feature
Burgess	Outward Expansion	Concentric Rings
Hoyt	Transportation Lines	Wedges/Sectors
Multiple Nuclei	Specialized Nodes	Multiple Centers
Galactic	Post-Industrialism	Edge Cities/Suburbs

Monocentric vs. Polycentric: Monocentric models (Burgess, Hoyt) assume a single dominant core, whereas polycentric models (Multiple Nuclei, Galactic) account for multiple specialized hubs of activity.
Developed vs. Developing: Models for developing regions (Latin American, African) often show a reversal of Western patterns, with the wealthiest residents living closer to the center and the poorest on the periphery.

6. Exam Strategy & Tips

Identify the 'Spine': If a question mentions a 'commercial spine' or 'elite residential sector' extending from the center, it is almost certainly referring to the Latin American model.
Look for Nodes: When a city is described as having an airport or university as a secondary center of growth, apply the Multiple Nuclei model.
Check the Axis: In Bid-Rent graphs, ensure you understand that the steepest curve represents the land use most sensitive to distance (usually retail).
Common Mistake: Do not assume all cities follow the Burgess model; modern cities are rarely perfect circles due to geography and varied transportation.