A study of Impacts of Immigration as the most Important Indicator in AHP Method In Assessment of Unofficial Settlements with GIS: (The Case study of Kashmar City)

Marginal regions are forgotten sectors of a city in which the quality of life is very low and unsuitable. Most of these settlements are located on marginal lands of the city which have low value and low price. In poor parts of the city, poor rural immigrants build their first cheap and small houses and then look for a suitable job. The main purpose of this research is studying the impacts of immigration which form urban poor areas and unofficial settlements. In order to do this districts are chosen in Kashmar city. To determine the features of study’s geographic scope, the AHP method using overlay in GIS is chosen as recognition model for such settlements. Output of this model illustrates that "Immigrant's population proportion of whole population" indicator in district between 9 socio-economic indices with a 0.308 of weight and between 30 physical, social, economical and environmental indices with a total weight of 0.164 is the most important indicator in this model. Also in the final output of the model, this indicator has a correlation of 74 percent with the result of applying all of the indices.