Spatial analysis of urban systems in the north of the country during the years 1335 to 1395

By studying urban systems, it becomes more specific the condition distribution and measure balance of population distribution. This article is being Compilation by aim the study changes in the urban system of the northern region to determine its equilibrium situation. The research method is descriptive-analytic and the basis of statistical data is the results of general census of population and housing in the past 8 years. In this paper, classifying the cities of the region over the past 60 years, used of indexes urban primacy includes primate city, tow city, Ginsberg, Mehta, moomaw and alwosabi, dominance mosavi and indexes centralization includes herfindahl, Henderson and indexes Balance includes entropy, coefficient of variation, rank-size to study the urban system of the region. The results perquisite from urban primary indexes and centralization it shows the measure urban primacy and centralization from 1335 to 1365 the trend has been decreasing but from 1365 to 1390 the trend has been on the upside until it in 1395 rebounds Slightly trend has been declines. The results of the indexes Balance also show the imbalance in the spatial distribution of the population in the urban system of the region from 1335 to 1395 has always increased. The results of the rank-size index also is indicate a relatively large difference between the actual population and the desirable population of the cities of region during the studied years and also, the relative importance of middle cities from 1335 to 1355 and domination of urban primary from 1355 to 1395.