1. Models of North American Cities
(Concentric Zone and Burgess Sector model)
By Kamryn Proctor and Katie McCall

2. Concentric zone model
Concentric zone model- a city grows outward from a central area in series of concentric rings
First to explain the distribution of different social groups within urban areas
Created in 1923 by E.W. Burgess

3. The Zones: Concentric Zone model
Includes 5 zones:
CBD (Central Business District) zone
Transitional zone
Working class zone
Residential zone
Commuter zone

4. Concentric Model Chicago
The model of chicago in the 1920s based on the urban growth
As the city grows and expands, new rings are added and previous rings grow and/or shrink

6. Sector Model Second theory of urban structure
Sector model- the city develops in sectors, not rings
As the city grows, activities expand out from the center in a sector
Also known as Hoyt Model

7. The zones Includes 5 zones Central business district
Transportation and industry
Low class residential
Middle class residential
High-class residential

8. Sector Model
areas are more attractive for different activities because of an environmental or buy me a chance

10. both models have 5 zones representing different development stages
The different models have developed to explain the variety of forms urban environments can take in in terms of the locations of different urban activities