Spatial Analysis of Urban Network System in Hamedan Province in the Period 1391-1365

Urban system of spatial distribution of city the geographic confine area and country refers. Space consequence of the increasing number of cities population, imbalance city network. Iran urban system the traditional model of galaxy before 1300 chain model (due to the concentration of facilities in large cities) inclined. This pattern in addition to the, disturb the logical relations between the small towns, middle and large with each other, cause confusion in Iran's urban system. One of the most important issues in urban system, the spatial distribution of the population. The aim of this study measure and evaluate balance in the system of the city of Hamedan during the 1365 to 1391 model entropy and nearest neighbor is investigated. Research method is descriptive- analytical; as well as for qualitative and quantitative analysis of statistical data Excel and GIS software is used. The Statistical Society of all cities in the province from 1365 to 1391 in the fourth period of census. The results of this study indicate that the distribution pattern of urban settlements in Hamedan province. /99 random and tending to normal that due to the rise of urban areas in close distance to major cities and central. also the results entropy method show Entropy coefficient in 1365 from 62 percent to 66 percent in 1391 urban surfaces and area surface of from 42 percent to 43 percent; the year 1391 Balancinglevel in four decades reached. Although the years 1365 to 1391 changes but the trend toward poor balance of population in urban areas and area of the province reveals. That in area surfaces the urban was more gradual descent. Overall urban hierarchy in the urban network of the province half been moderate. By providing equal opportunities for all cities Optimal spatial hierarchy can be in the province created.