A survey of potentional pattern and geomorphological limited in urban space producted with G.I.S case study semnan

Natural processes, especially geomorphology, play an important role in locating, planning and developing cities. In the past, so far, we have tried to find the best place for geo-morphological and environmental conditions for the development and physical development of cities. In this research, the applied geomorphology and its role in the physical development of Semnan city using Geographic Information System (GIS) and multi-criteria analytical hierarchical analysis (AHP) techniques have been investigated. For this purpose, effective criteria such as height, gradient, gradient direction, lithology and distance from fault are used. Each of the criteria was evaluated according to expert judgment and using Expertchoice software, weighting and importance of each of them was determined. Finally, using the fuzzy logic and geographic information system combination method, and according to the analytical comparison, the appropriate zones of the current situation of the city and the geomorphology of the region based on the critical points with the appropriate areas derived from the hierarchical analysis and the g.i.s Took The results of this research indicate that the role of geomorphologic factors in the location of Semnan is much more effective than other environmental factors.Also, data analysis shows that the city of Semnan is exposed to various environmental factors. Several of these factors, such as literacy, are severely restricted and may in the future create inappropriate conditions for the occurrence of other environmental hazards. To this end, the extension of the city must follow the geomorphological processes