This geographic concept, frequently encountered in Advanced Placement Human Geography courses, explains the spatial arrangement, size, and number of settlements. It posits that settlements function as central places providing services to surrounding areas. Larger settlements offer a wider range of goods and services than smaller ones, leading to a hierarchical structure. A key element is the concept of a “range,” which is the maximum distance a consumer is willing to travel for a particular good or service, and a “threshold,” which is the minimum population required to support a particular service.
Understanding this framework is critical for analyzing patterns of urbanization, economic activity, and service provision across different regions. Its benefit lies in its ability to predict the distribution of settlements and the availability of services based on factors such as population density, transportation costs, and consumer behavior. Developed by Walter Christaller in the 1930s, it provides a foundation for understanding the location and interaction of urban centers.