An Overview of Christallers Central Place Theory

Central place theory is a spatial theory in urban geography that attempts to explain the reasons behind the distribution patterns, size, and a number of cities and towns around the world. It also attempts to provide a framework by which those areas can be studied both for historical reasons and for the locational patterns of areas today. Origin of the Theory The theory was first developed by the German geographer  Walter Christaller  in 1933 after he began to recognize the economic relationships between cities and their hinterlands (areas farther away). He mainly tested the theory in southern Germany and came to the conclusion that people gather together in cities to share goods and ideas and that communities—or central places—exist for purely economic reasons. Before testing his theory, however, Christaller had to first define the central place. In keeping with his economic focus, he decided that the central place exists primarily to provide goods and services to its surrounding population. The city is, in essence, a distribution center. Christallers Assumptions To focus on the economic aspects of his theory, Christaller had to create a set of assumptions. He decided that the countryside in the areas he was studying would be flat, so no barriers would exist to impede peoples movement across it. In addition, two assumptions were made about human behavior: Humans will always purchase goods from the closest place that offers them.Whenever the demand for a certain good is high, it will be offered in close proximity to the population. When demand drops, so too does the availability of the good. In addition, the threshold is an important concept in Christallers study. This is the minimum number of people needed for a central place business or activity to remain active and prosperous. This led to Christallers idea of low- and high-order goods. Low-order goods are things that are replenished frequently such as food and other routine household items. Since people buy these items regularly, small businesses in small towns can survive because people will buy frequently at closer locations instead of going into the city. High-order goods, by contrast, are specialized items such as automobiles, furniture, fine jewelry, and household appliances that people buy less often. Because they require a large threshold and people do not purchase them regularly, many businesses selling these items cannot survive in areas where the population is small. Therefore, these businesses often locate in big cities that can serve a large population in the surrounding hinterland. Size and Spacing Within the central place system, there are five sizes of communities:   HamletVillageTownCityRegional capital A hamlet is the smallest place, a rural community that is too small to be considered a village. Cape Dorset (population 1,200), located in Canadas Nunavut Territory is an example of a hamlet. Examples of regional capitals—which are not necessarily political capitals—would include Paris or Los Angeles. These cities provide the highest order of goods possible and serve a huge hinterland. Geometry and Ordering The central place is located at the vertexes (points) of equilateral triangles. Central places serve the evenly distributed consumers who are closest to the central place. As the vertexes connect, they form a series of hexagons—the traditional shape of many central place models. The hexagon is ideal because it allows the triangles formed by the central place vertexes to connect, and it represents the assumption that consumers will visit the closest place offering the goods they need. In addition, central place theory has three orders or principles. The first is the marketing principle and is shown as K3 (where K is a constant). In this system, market areas at a certain level of the central place hierarchy are three times larger than the next lowest one. The different levels then follow a progression of threes, meaning that as you move through the order of places, the number of the next level increases threefold. For example, when there are two cities, there would be six towns, 18 villages, and 54 hamlets. There is also the transportation principle (K4) where areas in the central place hierarchy are four times bigger than the area in the next lowest order. Finally, the administrative principle (K7) is the last system where the variation between the lowest and highest orders increase by a factor of seven. Here, the highest order trade area completely covers that of the lowest order, meaning that the market serves a larger area. Losch’s Central Place Theory In 1954, German economist August Losch modified Christallers central place theory because he believed it was too rigid. He thought that Christallers model led to patterns where the distribution of goods and the accumulation of profits were based entirely on location. He instead focused on maximizing consumer welfare and creating an ideal consumer landscape where the need to travel for any good was minimized, and profits remained relatively equal, regardless of the location where goods are sold. Central Place Theory Today Though Loschs central place theory looks at the ideal environment for the consumer, both his and Christallers ideas are essential to studying the location of retail in urban areas today. Often, small hamlets in rural areas do act as the central place for various small settlements because they are where people travel to buy their everyday goods. However, when they need to buy higher-value goods such as cars and computers, consumers who live in hamlets or villages have to travel into the larger town or city, which serves not only their small settlement but those around them as well. This model is shown all over the world, from rural areas of England to the U.S. Midwest or Alaska with the many small communities that are served by larger towns, cities, and regional capitals.

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