Urban settlements are defined by high population density, a predominance of secondary and tertiary economic activities, and a complex administrative structure. Unlike rural settlements, which are often organic, urban areas are increasingly shaped by planned infrastructure and global economic trends.
Types of Urban Settlements (Hierarchy and Size)
Urban areas are categorized based on their population size and the complexity of their functions. In India, the Census provides a rigorous framework for these classifications.
1. Statutory Towns
Any settlement with a municipality, corporation, cantonment board, or notified town area committee. These are urban areas by legal decree.
2. Census Towns
Settlements that satisfy the following three criteria:
- A minimum population of 5,000.
- At least 75% of the male main working population engaged in non-agricultural pursuits.
- A density of population of at least 400 persons per square kilometer.
3. Urban Agglomeration (UA)
A continuous urban spread consisting of a town and its adjoining outgrowths (OGs), or two or more physically contiguous towns together with or without outgrowths.
4. City vs. Town
- Town: Generally refers to a settlement with a population between 5,000 and 100,000.
- City: In the Indian context, a town with a population of 100,000 (1 Lakh) or more is categorized as a “Class I Town” or a City.
- Metropolis: A city with a population between 1 million and 5 million.
- Megacity: A city with a population exceeding 10 million (e.g., Mumbai, Delhi).
Patterns of Urban Settlements (Morphology)
The internal and external “patterns” of a city refer to its layout and the spatial arrangement of its land use. These are often influenced by the era of their development (Medieval vs. Modern).
1. Radial Pattern
The city expands outward from a central point (like a palace, temple, or CBD). Roads radiate from the center like the spokes of a wheel.
- Example: New Delhi (Connaught Place) and many European “Star Cities.”
2. Grid-Iron Pattern (Chessboard)
Streets run parallel and perpendicular to each other, intersecting at right angles. This is the hallmark of planned urbanism.
- Example: Chandigarh, Jaipur (Old City), and Manhattan.
3. Linear Pattern
The city develops in a long, narrow strip, usually confined by physical barriers like mountain ranges, coastlines, or major transport arteries.
- Example: Mumbai (constrained by the coast) or cities in narrow river valleys.
4. Concentric Pattern
Development occurs in rings around a central core, with each ring serving a different social or economic purpose.
- Model: Burgess’s Concentric Zone Model.
5. Disintegrated / Poly-Nuclear Pattern
The city lacks a single clear center and instead consists of several specialized hubs (nuclei) that have merged over time.
- Example: The Tokyo Metropolitan Area or the National Capital Region (NCR).
Functional Classification of Urban Centers
Urban areas are also typed by their primary economic “reason for being.”
| Type | Function | Examples |
| Administrative | Capital cities and government hubs. | New Delhi, Canberra, Gandhinagar. |
| Industrial | Focused on manufacturing and processing. | Jamshedpur, Detroit, Bhilai. |
| Transport | Port cities or major railway junctions. | Kochi, Rotterdam, Itarsi. |
| Commercial | Centers of trade, banking, and finance. | Mumbai, New York, Hong Kong. |
| Mining | Developed near mineral deposits. | Raniganj, Kalgoorlie, Digboi. |
| Garrison | Military and cantonment towns. | Ambala, Mhow, Babina. |
| Religious | Centers of pilgrimage and culture. | Varanasi, Vatican City, Amritsar. |
Comparison of Urban Patterns
| Pattern | Driver | Key Feature |
| Planned | Government Regulation | Symmetry, zoning, and public utilities. |
| Organic | Historical Growth | Narrow winding streets, mixed land use. |
| Satellite | Decongestion Policy | Independent hubs linked to a mother city. |
| Sprawl | Market Forces | Low-density, horizontal expansion. |
Trivia for UPSC Prelims
- Conurbation: A term coined by Patrick Geddes for the merging of several cities into one (e.g., Greater London, Mumbai-Thane belt).
- Megalopolis: A massive urban chain (e.g., BosWash corridor in the USA).
- Ecumenopolis: A theoretical “world city” where all urban areas eventually merge (proposed by Constantinos Doxiadis).
- Primate City: The lead city in a country which is disproportionately larger than any others in the urban hierarchy (e.g., London, Bangkok).