Evaluating various criteria for determining diversity of urban Mixed Land Use via GIS (Case Study: neighborhoods and districts of Tehran Municipality No.7)

Methods of zoning and land use allocation are experienced in the history of urbanism and its weak and strong points are clearly investigated. In spite of some advantages، this kind of spatial planning has its own disadvantages. New ideas of urbanism support the viewpoint of mixed land use and consider it as the key element for urban sustainability. In recent decades، mixed land use is introduced as a key element in Transit Oriented Development، Traditional Neighborhood Development، smart growth and new urbanism. Mixed land use means every combination of land uses that can be vertically، horizontally or time combined with each other. The concept of mixed land use from the viewpoint of spatial planners is an important tool to achieve sustainable development. In order to evaluate the presented model from the viewpoint of mixed land use، a proper spatial criteria and an evaluation method is required. In this study، many methods of evaluation of versatile criteria and a positional criterion for evaluating mixed land use are investigated. Then، a Geographic Information system is used as a powerful means of analyzing and administrating the spatial data. The method in this paper is applied for the horizontal dimension in the 7th regional municipality of Tehran city. Theoretical bases: Evaluation criteria for mixed land use can be categorized based on different concepts. With respect to effective factors in mixed land use (four dimensions: Horizontal، vertical، shared premises and time dimensions، land uses، Geographic scale and spatial criteria)، this procedure is a very complex issue. Compositional pattern of land use mixture is a method to determine spatial assimilation of land development and is very important in the study of mixed land use. To evaluate mixed land use model، this criterion is divided into Evenness and Diversity and clustering. In this study، the aim of criteria evaluation is to determine the diversity of urban mixed land use via GIS. To evaluate the results of distribution pattern (diversity) of urban mixed land use via GIS in the mentioned region، according to the conceptual model of Mixed Land Use، this analysis based on the diversity index is done for the 7th region of Tehran city. Urban land use planning deals with how to assign different land use to Land. Over the past few decades mixed land uses development become a model for urban planning، and due to social، economic and environment benefits has been well received in the advanced countries. In this study، Identify the strengths and weaknesses of indicators of diversity in MLU، the proposed indicators for the horizontal dimension urban neighborhoods and districts in the 7th regional municipality of Tehran city will implement. Practical analysis of indicators for the analysis presented above in the study area، indicating the ability of the proposed indicators to evaluate the MLU diversity in the study area.