Distribution the size population of the urban centers in Baghdad Governorate

	Distribution the size population of the urban centers in Baghdad Governorate
Alustath
Article 1, Volume 1, Issue 209, 2018, Pages 607-636
Abstract
This research is aiming to stand on the nature of the herarichy of the urban centers in Baghdad province, through the size spreading of the centers, passing by the base of the rank-size, reaching to the relation among these centers and the distances among them, and identifying the layers of the urban centers and their services for one year period in 2012, i.e. putting general standards for the series of the urban centers in accordance to the population sizes reaching to an integrate urban system, depending on descriptive and quantities curriculum in analyzing the phenomenon. The most important result reached by the thesis is that Baghdad civilization degree in 2012 was (87.3%) with inclination degree of (18.1) from the urbanism general level which is (69.2%), they represent the first class province among Iraq provinces. And the size category is (100001-500000) people, which the head of the rest of the categories, where it attract the greatest number of the urban centers which are (20) centers, to constitute a ratio (62.5%) and with a population of (4110687) people to reach a ration increasing of (56%) of the total population, and this category is the most spread on the area of Baghdad province, The urban centers do not take the relation between the size and the number which is said of the increase of the urban centers number in the small size category, where it appeared that numbers are increased by the size category increasing, i.e. the relation is direct, this depends on the power of influence the city of Baghdad in its provinces and districts.

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