Study sheet: Urban Concepts and City Types

📋 Course Outline

1. Historical and Formal City Concepts
2. Administrative Functional and Social Concepts
3. Geographical City Characteristics
4. Metropolises and Urban Concentration
5. Global Cities and Primacy
6. Megacities and Future Growth

📖 1. Historical and Formal City Concepts

🔑 Key Concepts & Definitions

• Historical city concept : The preindustrial or premodern city that developed in the Middle Ages and was characterized by castles, a city wall, and a dichotomy between city and countryside.
• Formal city concept : A city through a concentration of houses, a compact settlement body, and its built form, including streets and buildings.

📝 Essential Points

• Historical city-country boundaries included: a clearly defined wall, a crossroads or market square, quarters segregated by occupational groups, city, jurisdiction, market, minting, and stacking rights

💡 Memory Hook

The historical concept contrasts city and countryside, whereas the formal concept focuses on built form.

📖 2. Administrative Functional and Social Concepts

🔑 Key Concepts & Definitions

• Administrative city concept : A city according to a population threshold, which differs between countries.
• Functional city concept : The main function of the city as a whole, its internal functions such as housing, work, and shopping, and its centrality for a wider surrounding area.
• Sociological city concept : An urban way of life and social space shaped by urban environments, including values, behavior patterns, anonymity, selective relationships, freedom, constraint, tolerance, and justice.

💡 Memory Hook

AFS: Administrative, Functional, Social perspectives.

📖 3. Geographical City Characteristics

🔑 Key Concepts & Definitions

• Geographical city concept : A compact settlement with high residential and workplace density, diverse occupations, strong internal spatial differentiation, relatively high transport accessibility, a surplus of goods and services for a wider area, and largely artificial environmental design.

📖 4. Metropolises and Urban Concentration

🔑 Key Concepts & Definitions

• Metropolis : A city with at least 1 million inhabitants and outstanding political, economic, cultural, and social functions.
• Metropolization : The concentration of population and political, economic, cultural, and social functions in one metropolis or, in larger federal states, several metropolises.

📝 Essential Points

📐 Formula — The metropolization rate is calculated as $\frac{\text{population living in the metropolis or metropolises}}{\text{total population of the area}}\times 100$.

💡 Memory Hook

Metropolis → megacity → megalopolisization.

📖 5. Global Cities and Primacy

🔑 Key Concepts & Definitions

• Global City : A large city with international functions, such as an international financial center and the headquarters of international institutions and global companies.
• Primacy index : The Index of Primacy is the quotient of the population of a country's largest city divided by the population of its second-largest city; examples are 5.2 for Mexico City, 7.8 for Lagos, and 1.9 for Berlin.

📝 Essential Points

• Global Cities contain:
  • international financial centers
  • headquarters of multinational companies
  • major international institutions
  • important industrial centers
  • business-oriented services
  • large agglomerations
  • nodes of international transport networks

💡 Memory Hook

Global Cities connect internationally, whereas primate cities dominate their own country.

📖 6. Megacities and Future Growth

🔑 Key Concepts & Definitions

• Megacity : A metropolis with more than 5 million inhabitants, although some definitions use more than 8 or 10 million, and it may also be characterized by a population density above 2000 inhabitants per square kilometer and a monocentric structure.
• Future megacity : A million-plus city expected to become a megacity within the foreseeable future through continued growth.

★ Must-know

• 🔄 Megacities grow through:

  1. immigration from smaller cities
  2. immigration from rural areas
  3. natural population growth

• Rapid megacity growth creates major administrative problems in providing jobs, housing, and infrastructure and is often accompanied by increasing informality and declining governability.

Further detail

• Using a threshold of 5 million inhabitants and United Nations population projections for 2025, there were approximately 25 future megacities. — UN, 2008

💡 Memory Hook

Migration and natural growth → rapid expansion → pressure on housing, jobs, infrastructure, and governance.

📊 Synthesis Tables

Main city types

Type	Defining criterion	Main emphasis
Metropolis	At least 1 million inhabitants	Outstanding political, economic, cultural, and social functions
Megacity	More than 5, 8, or 10 million inhabitants	Very large population, density, and often monocentric structure
Global City	International functions	Global finance, institutions, companies, and transport networks
Primate city	Dominance over the country's other cities	Disproportionate population and economic concentration