Central Place Theory: Central Place Theory explains how settlements are spatially arranged in relation to one another based on their size, function, and distance from each other.
Sector Model: The Sector Model is an urban model developed by economist Homer Hoyt that suggests that cities grow outward from a central business district in wedge-shaped sectors along transportation corridors.
Multiple Nuclei Model: The Multiple Nuclei Model is an urban model that suggests that cities have multiple centers or nuclei with specialized functions, rather than relying solely on one central business district.