Proximal boundary in urban geography is used to delineate the start or closest edge of an area under urban influence, marking where the influence of a city or town is strongest.
The “proximal boundary method” refers to geographical models, such as the Thiessen polygon method, that determine a city’s sphere of influence by identifying the midpoint between that city and other cities of similar hierarchical level. It operates on the principle that people will travel to the closest city, effectively creating a “proximal” boundary where a person is closer to one city’s services than another’s.
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