An Analysis of Polarization Effects of Offices Site-selection on Overlapped Areas of City Service Zones (case study: Rasht city)

Polarization of land use in cities plays a significant role in the importance of the different city zoning. Administrative land uses can be identified as the effective uses in cities. Such land uses attempt to get located in expensive parts of cities from the very beginning step, but after locating they would turn into a factor to attract other Organizations. In addition, each one of key service organizations in cities attempt to do city zoning based on special standards which, in many cases, are overlapping and may cause some problems. Present research paper is determined to scrutinize the polarization of land uses in city and also the importance of overlapped areas of five organizations involved in developmental and management issues of Rasht (departments of power, gas, water and water waste, telecommunication and municipality). It is based on the importance of their organization applying their documentary and survey studies. Therefore, the required databases in GIS environment was created. Moreover, current situation of different city zoning was drawn and analyzed. After that, overlapped areas were identified and the available layer of administrative centers were provided using statistical block data of 2011. The data were compared with the layer of administrative overlapped zones. AHP method was used to rate the bureaus in overlapped zones. Besides, polarization of land uses was performed using Entropy model and ArcGIS software. The findings indicate that the centers of state government-governance, management of bank branches and justice department are considered to be more significant than other administrative centers. Furthermore, zones of 2, 3, 10, 17 and 35 have the most accumulated offices among other overlapped centers. Also, service land uses and municipality have the highest focus and state government-governance, while justice department and roads and urban development have the least focus among other administrative centers.