Physical-spatial analysis of the structure urban old texture using the GIS (Case study: the central core of Sardasht city)

One of the topics studied in order to understand the city and its formation, the historic fabric of the city. Although these sites are in urban centers, most of their houses due to the instability of the materials used in them are to be destroyed and abandoned. Old texture, the concept of spatial and physical exhaustion, the product of affect and are affected between social processes and geographic space. The phenomenon of burnout in the tissues of the body urban context and its impact on social and economic activities. Therefore, the issue of urban distressed areas, one of the scholars of different issues and challenges of today's cities and city managers in the area led efforts to it. The study population was selected as the Sardasht city central core. This study aimed analytical approach and gather information on library studies, scrolling and in most cases directly on-site observations, the author studied and analyzed using the software SPSS ver.19.0 and Arc GIS ver.10.1 respectively.
The results show that the problem of the lack of inheritance, microlithic and impermeable central part of the study area are the most important factor in exhaustion. Also, the core of burnout indicators Sardasht exhaustion in the context of a significant positive relationship exists. According to calculations the old neighborhoods of stability is not a high level and Ashan old neighborhoods and the city of Sardasht Srchaveh are unstable. Until the global flow of the industrial revolution, very slow and subtle changes in urban communities and consequently, the Urban also faced with significant changes. Because of man-made artifact as well as other phenomena change over time, the evolution, growth and development. The aim of this study is to examine a sample of tissue near the center, with an area of 460277.3 square meters in the center of old town of Sardasht that using the GIS, identifying indicators of burnout, extraction and output maps to decide decision making and subsequent decisions is used.In general, the aim of this study was to analyze the physical-spatial structure of urban old texture and clarifying the problems of the city and offer solutions to solve these problems and achieving an optimal pattern for each of the applications studied in the neighborhood Sardasht city and to answer the following questions.What are the most important factors in the study area is exhaustion? General state of exhaustion desired range, based on the total indexes to identify damaged, how? Also, which of these indicators were more effective in the context of the target range are worn know? The research method is descriptive - analytical. The study area is the core of Sardasht includes Ashan and Srchaveh neighborhoods are the oldest neighborhoods. Data collection method based on library studies, scrolling and in most cases directly on-site observations, the author studied and analyzed using SPSS software and Arc GIS ver.10.1 been Ver.19.0.Forms authentication with the opinion of several experts and personnel of technical office verified the Municipality of Sardasht and all forms of audits by auditors completed and collected. By providing a thorough understanding of the properties of this layer of the old structure was obtained, then compare it with the whole city, statistics and more information was analyzed. Identify the criteria used in this study include: worn parts, size of property, burnout, use and durability. Given the size and quality of the environment in urban areas, the findings of the audit and completion of field work, the author, at the core of Sardasht is as below: was also the block pieces 1018 (54/66 percent) have less than 200 meters high microlithic which indicates the block has been studied in Sardasht city's central core. While 512 pieces (46/33 percent) over 200 meters in place that reflects the density and abundance of small pieces with a small area. As a result, one of the most important factors a sharp deterioration in residential neighborhoods tissues is microlithic parts. The output of the study show that between 1530 pieces, 719 pieces (99/46 per cent) of non-time-worn tissue and 788 pieces (50/51 percent) have been worn tissue which represents a significant deterioration in the tissues of the central core of the city of Sardasht is. Most buildings in these tissues are outdated or does not follow technical standards, So that their standard of well-defined exterior of the building. According to the table shown below the tissue physically not in good condition because a large percentage of tissue structures, they are old materials. The results show that the width of the streets in the neighborhood of 86/55 percent of infiltration and with a width of less than 8 meters. One of the main causes of the problems of the historic fabric in most places the needs of today's non-compliance with the old textures. Especially in terms of physical, fatigue and shortness of texture as a result of these passageways, access to services and facilities are not new. The results showed that the index of major materials and antiquity and quality buildings the most important factors affecting the intensity of Worn-out In this research is the study area and Ashan and Srchaveh neighborhoods in the study area are a high percentage of Worn-out. The results of the study indicate that (in order of efficacy percent in exhaustion), permeability index, microlithic and physical strength and inheritance are the most important factors in the study area exhaustion.
According to calculations the old neighborhoods of stability is not a high level and the old neighborhoods of the city of Sardasht are unstable Ashan and Srchaveh the following reasons:- the central part of the city, in addition to containing ancient heritage, the economic dimension is also important, as the market is the economic heart of the city, has increased the importance of this part of town.
- Central and spatial structure of the current traffic capacity is not large, so the pressure on the sector is growing.