Urban Models and Settlement Patterns

Spine: This key feature represents an area characterized by economic activities and high-wealth residences extending towards the Central Business District (CBD). It signifies the core economic axis of the city.
Disamenity Zones: These areas are typically steep, mountainous, and are often deemed dangerous. They lack connections to essential city services, contributing to socio-economic challenges.
Squatter Settlements: Known as "favelas" or "barrios", these settlements emerge on the city outskirts and within disamenity zones. They are informal housing areas that often lack basic infrastructure.
Zone of In Situ Accretion: A transitional area characterized by mixed-quality housing. It serves as a buffer between elite residential neighborhoods and squatter settlements, illustrating the varied socio-economic landscape.
Other Zones:
- Zone of Maturity: Established residential zones showing sustained development and accessibility to services.
- Zone of Peripheral Squatter Settlements: Housing typically found further away from the city center, highlighting urban sprawl issues.
- Elite Residential Sector: High-quality housing areas inhabited by affluent residents.
- Middle-Class Residential Tract: Areas designed for middle-income families offering a moderate standard of living.

Port Zone: Traditionally the commerce center established during the colonial era, the port zone is crucial for trade and economic interaction.
Alien Commercial Zone: A result of historical trends, this area serves as the secondary commercial hub largely occupied by Chinese immigrants and businesses in Southeast Asia.
Western Commercial Zone: This zone pertains to areas where European merchants establish their commercial activities, a phenomenon rooted in colonial history.
Market Gardening Zone: Recognized for its agricultural potential influenced by the climate, this zone specializes in growing food for local markets.
Urbanization Effects: Rapid urban expansion leads to the formation of squatter settlements, indicating significant urbanization challenges and socio-economic disparities.
Spatial Patterns: Wealthier residents are often located closer to the port zone, reflecting socio-economic stratification within urban spaces.

Understanding the Latin American and Southeast Asian city models helps in analyzing urban development, socio-economic stratification, and implications of colonial histories within the context of urban settlements.
The dynamics between higher-income zones and squatter settlements are critical for grasping the challenges faced in urban planning and policy-making.
Strategies for revitalization and community support are essential to address issues arising within disamenity zones and squatter settlements.