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Evaluating the models
Concentric Model: A model, devised by Ernest Burgess, of the internal structure of cities in which social groups are spatially arranged in a series of rings. As the city grows and expands, new rings are added and the old ones change character. A key element of the model is the central business district. Pros: CBD is the center of the economy. The zones are connected by the CBD. Cons: the model does not account for physical geography of the city. On the map about "Median Household Income," you can see rings and how Sacramento is the Central Business District (CBD). Around the CBD is where the city expands.
Sector Model: a model created by Homer Hoyt. His theory is that a city develops in a series of certain sectors, instead of rings. The pros to this model are: built along transportation routes, easy access to CBD at almost all points, and allows for outward progression of growth. The cons to this model are: little reference to physical features/landscapes. In the map "Median Household Income," viewers can see sectors of the middle class and upper class base upon income.
Multiple Nuclei Model: developed by Chauncy Harris and Edward Ullman. It’s a model of the internal structure of cities in which social groups are arranged around a collection of nodes of activities. The pros to this model are: specialization of regions and zones, flexible structure and can be adapted to many local situations. The cons to this model are: complicated layout and organization, multiple focal points lead to no clear CBD, and lack of connectedness. In the map of "Population Density," There's a higher population toward the CBD and viewers can tell where areas are less populated, which are found in lower class residential areas.