克里斯泰勒的中心地理学说根据市场经济原则对城市群的城市等级规模作了描述

Christelle’s theory of central geography describes the scale of urban agglomerations based on the principles of market economy, pointing out that there are cities of different levels in a certain area, and cities at all levels have different functions. He designed several multi-level urban agglomeration network systems with different functions and characteristics, and proposed the layout of the center and market areas: (1) Various large and small cities and their market areas form hexagons of different sizes to form a multi-polar system (2) The more high-level centers can provide more and more complete types of goods and services, including those expensive high-level goods, and the lower-level centers are limited to providing a few necessities of daily life for residents with high frequency. The upper-level center should have all the functions of the lower-level center, and the lower-level center cannot have the functions exclusive to the upper-level center; (3) The market area of ​​the unified registration center city is completely equal, and the distance between two adjacent same centers is Equally, the shorter the distance between the lower-level central cities. However, the shortcoming of this theory is that its assumptions are too ideal, which will greatly reduce its practical guiding significance. For example, when designing various levels of network systems, it is assumed that the city is developed from a single commodity supply point, but in fact the city It is the result of market economy and social development.

Chris Taylor's central geography theology describes the scale of urban clusters according to the principle of market economy, and points out that there are different levels of cities in a certain area, and cities at all levels have different functions. He designed several multi-level urban cluster network systems with different functional characteristics, and proposed the layout of the central and market areas: (1) the formation of different sizes of hexars in various large and small cities and their market areas to form a multipolar system; , and the lower center can not be both the exclusive functions of the superior center; (3) the market area of the city where the unified registration center is located is completely equal, the distance between the two adjacent centers is equal, and the shorter the distance between the lower the central city. However, the theory is not enough because its assumptions are too idealistic, which will greatly diminish its practical guiding significance, for example, in the design of the network system at all levels, it is assumed that the city is developed from a single commodity supply point, when in fact the city is the result of the role of market economy and social development.

According to the principle of market economy, christael's central geography theory describes the scale of urban agglomerations, and points out that there are different levels of cities in a certain region, and all levels of cities have different functions. He designed several multi-level network systems of urban agglomerations with different functional characteristics, and put forward the layout ideas of central place and market area: (1) each big and small city and its market area form a hexagon with different sizes to form a multipolar system; (2) the more advanced the center is, the more abundant and complete kinds of goods and services can be provided, including those expensive high-end goods The lower level centers are only limited to providing a few kinds of daily necessities that need high frequency of residents. The higher level centers should have the functions of all the lower level centers, while the lower level centers can not have the exclusive functions of the higher level centers; (3) the market area of the unified registration center city is completely equal, and the distance between two adjacent centers is equal, the lower the level The shorter the distance between the central cities. However, the deficiency of the theory lies in the over idealization of its assumptions, which will greatly reduce its practical significance. For example, when designing the network system at all levels, it is assumed that the city is developed from a single commodity supply point, but in fact, the city is the result of market economy and social development.<br>