Analysis of sprawl on Chabahar urban border with Heldern and Entropy Shanon models

Today more than half of the population live in urban cities . One of the most important characteristics of urbanization is rapid physical expansion of the city in horizontal distribution and irregular expansion of the city outside of physical limits are one of them . Due to growth of population especially after the establishing of free trade Zone ,Chabahar city has faced rapidly growth in physical dimension .so the importance of examining the physical expansion o tge city it has been studied between from 1984 and 2019. The present research is descriptive and analytical.The research method in the present study is in terms of the type of developmental applied research and by using Heldern and Entropy Shanon models it has analysed how the physical space expansion of this city .The results of using and analyzing theses models show that these periods have been the physical and non dense physical expansion paving the way for the city unplanned sprawl growth.