Central Place Theory attempts to predict various orders of central places, markets they serve, etc. It applies to those settlements that are predominately concerned with serving the need of the surrounding area. The significance of their service role can't be measured simply by the population of the place. There are different orders to good and services. Some are costly, bought infrequently and need large populations to support them, others are everyday items that require small populations. Two concepts emerge from this observation. The first is that of Threshold Population. That is the minimum population required for a good or service to
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