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Historical Context: Urban models were widely adopted by geographers during the mid to late twentieth century.
Rapid Urban Growth: The models are now considered somewhat obsolete due to the accelerated growth of cities worldwide.
Continued Relevance: Despite their age, these models still hold useful information for current urban studies.
Figure 48.8: Depicts a city model of Sub-Saharan Africa.
Key Feature: The model shows three Central Business Districts (CBDs).
Rationale for CBDs: Understanding the distribution and function of multiple CBDs can provide insights into urban spatial organization.