Urban GIS
Amir Baghban; sajedeh baghban khiabani; Mozhgan Sabet Teimouri
Abstract
Highlights
- Mashhad’s urban inefficiency problem follows a clustering pattern.
- The increase in informal settlements on the outskirts of Mashhad is due to microlithic structures and impenetrable textures.
- The G_i statistic highlights the location of cold clusters with lower inefficiency ...
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Highlights
- Mashhad’s urban inefficiency problem follows a clustering pattern.
- The increase in informal settlements on the outskirts of Mashhad is due to microlithic structures and impenetrable textures.
- The G_i statistic highlights the location of cold clusters with lower inefficiency in the pilgrimage area.
- Small rented and unstable buildings exert a stronger influence on the inefficiency of structures than other factors.
1-Introduction
Cities are dynamic systems, constantly evolving under the influence of social, cultural, economic, and political factors. Urban inefficiencies, particularly in certain textures, pose significant challenges to urban planners. Inefficient urban textures represent areas where physical, functional, and social quality are severely lacking. These textures, often formed over long periods, fail to meet the needs of their residents. The city of Mashhad, Iran’s second-largest metropolis, encompasses 6688 hectares of inefficient textures. These areas are marked by inadequate housing, inconsistent land use, and poor infrastructure, among other challenges, leading to a low quality of life for residents. This imbalance in physical development and population settlement poses numerous challenges. Hence, evaluating the vulnerability and inefficiency of these textures is critical. This study aims to investigate the spatial patterns of inefficiency in Mashhad's urban textures.
2-Theoretical Framework
Inefficient urban textures are sections of a city where infrastructure, buildings, streets, and other components become ineffective, causing a range of socio-economic and physical problems for residents. These inefficient urban areas can be categorized into five types:
2-1-Informal settlements: Primarily house rural migrants and the urban poor.
2-2-Middle inefficient (worn-out) textures: Parts of the city developed after the 1300s without adherence to architectural or urban planning standards.
2-3-Historical city textures: These sections hold historical value in urban planning and architecture but are now inefficient.
2-4-Urban areas with a rural background: Areas within the city that have not integrated with the broader urban fabric.
2-5-Areas with incompatible urban use: Locations where the current usage contradicts urban planning needs.
Understanding the development of these textures is crucial for assessing their inefficiency and the urban planning interventions required to address them.
3-Methodology
The study employed a descriptive-analytical approach, gathering data through extensive library research and literature reviews. The study area consisted of 6688 hectares of inefficient textures in Mashhad. To assess the level of inefficiency in these areas, the WSUM (Weighted Sum) technique was employed. Further spatial analysis was conducted using ArcGIS software, with a particular focus on spatial self-dependency patterns, analyzed through models like the Global Moran Model and the G_i statistic. Geographically weighted regression (GWR) was then used to model the spatial relationships between different factors contributing to urban inefficiency.
4-Results and Discussion
The results showed that informal settlements and marginal areas of Mashhad are more inefficient compared to the middle and central parts of the city. Analyzing the spatial pattern of inefficiency using the Global Moran method and G_i statistics revealed that the inefficiencies follow a cluster pattern. The Global Moran method produced a positive score of 0.1, with a z-score of 68.26 at a significance level of 99%. This indicates a significant clustering of inefficient textures.
Further analysis with the G_i statistic showed a G value of 0.000120 and a z-score of 19.14, confirming a high-concentration clustering pattern of inefficiency. The spatial correlation analysis revealed that hot spots (high-concentration clusters) are located in the eastern, southeastern, and northwestern parts of the city, where informal settlements dominate. In contrast, cold spots (areas of low inefficiency) were concentrated in the central parts of the city, including the pilgrimage area. The spatial patterns in other parts of the city showed little or no significant clustering.
The geographically weighted regression (GWR) model revealed that microlithic buildings, rented housing, and unstable structures have a greater impact on the inefficiency of urban textures than other variables. The combination of spatial patterns and socio-economic factors suggests that the areas of Mashhad most in need of intervention are informal settlements and marginal areas.
5-Conclusion
While most studies on inefficient urban textures have utilized multi-criteria decision-making methods or statistical tests, few have focused on spatial analysis. This study introduced a new approach to understanding urban inefficiency by combining WSUM, Moran’s global method, and the G_i statistic to assess spatial patterns. The findings highlight the severe inefficiency in Mashhad’s informal and marginal areas compared to central areas.
Hot spots of inefficiency are concentrated in informal settlements on the city’s eastern, northeastern, and northwestern margins, creating a cluster pattern of inefficiency. In contrast, the pilgrimage area and central parts of the city show fewer inefficiencies. The GWR model further emphasized that unstable buildings and rented houses are key drivers of inefficiency in these areas.
The study underscores the importance of spatially targeted interventions, especially in informal settlements and marginal areas. Given the diverse types of inefficiencies across the city, urban planners must adopt differentiated strategies when addressing various forms of urban inefficiency. Addressing these issues in informal settlements should be a priority to improve the overall quality of life and urban function in Mashhad.
Urban Planning
Mozhgan Sabet Teimouri; sajedeh baghban khiabani; ali alizadeh Zoeram
Abstract
HighlightsCulture and tradition have been the most important effect on development of tourism Destruction of agricultural lands threatens the sustainable development of tourism Destruction of traditional textures threatens the sustainable development of tourism Destruction of agricultural ...
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HighlightsCulture and tradition have been the most important effect on development of tourism Destruction of agricultural lands threatens the sustainable development of tourism Destruction of traditional textures threatens the sustainable development of tourism Destruction of agricultural lands is one of the negative consequences of tourismIntroductionTourism is a relatively new social activity that has recently emerged as a global phenomenon, and is considered as an important factor in social and cultural changes and development. Today, most experts recognize that the phenomenon of tourism can enrich all areas of human life in terms of speed and aspects of influence as the miracle of the century. Various effects of tourism development are observed in the city of Shandiz, Iran as tourists flood into the city. The development of tourism in Shandiz and its surrounding areas has led to positive physical and functional changes, such as the expansion of health care and accommodation facilities and increase in access to transportation. In general, factors including the desire to divide land and establish complexes as neighborhood settlements and sites equipped for gardening and residence (temporary residences), consistent with the development of tourism in the city, cause the location and construction processes to neglect the natural environment, the requirement for infrastructures and relevant services, and the impact on existing settlements, resulting in widespread intrusion on physical properties and their destruction. Given the positive and negative effects mentioned in regard to Shandiz, this research sought to make an expert analysis of the future trends in the city in order to mitigate or eliminate the negative effects and promote the positive ones based on the model of sustainable tourism development. The study was focused on identification of scenarios for addressing the physical and functional effects of the development of the Shandiz tourism destination and on specification of the optimal scenario in this field.Theoretical FrameworkThe tourism industry can have significant effects as an important form of human activity. It is quite clear how tourism affects the destination area, where tourists interact with the local environment, economy, culture and society. It should be noted that tourism issues are generally multifaceted, and their categorization is not as straightforward as often stated. In other words, the effects of tourism cannot be classified simply as social, environmental, or economic, as they tend to exhibit many interrelated dimensions, and may change over time with the development of destination areas.MethodologyFor achievement of the purpose of the study, descriptive-analytical investigations, documentations, and questionnaires were applied in the framework of the Delphi model and software analyses. After an enumeration of the key driving forces using the Delphi method, the method of future research was used to explain the various conceivable conditions for the future of Shandiz. Therefore, different conceivable states for each of these variables were discussed in expert panels, where the participants presented the pros and cons of each of the proposed scenarios. Then, the experts were asked to judge the effect of each possible situation on others on a qualitative scale from -3 (strongly restricting effect) to +3 (strongly promoting effect) according to the conditions prevailing in the study area. The expert judgments were incorporated into the ScenarioWizard software environment for presentation of system-compatible scenarios, ranging from the most favorable to the most catastrophic on a continuum involving moderate as well as favorable and catastrophic scenarios.Results and DiscussionThe findings of the study forecast three possible scenarios out of 39366 for Shandiz in the 2029 prospects, of which one was evaluated as favorable and two as unfavorable, although the results of similar studies have indicated the importance of land use change in the process of sustainable tourism development in cities. The findings of this study, however, demonstrate that culture and tradition have been the most important determinants of sustainability in the development of tourism in Shandiz. In an analysis of such results, it can be stated that the most effective assumptions here involve an enhancement of the traditional features of the fabric in the favorable scenario and their destruction in the unfavorable scenarios. However, destruction of agricultural lands was identified in this research as a negative consequence of tourism development, unlike in other studies. The findings indicate that moderate construction of buildings of residential use and enhancement of the traditional features of the city will effectively contribute to credibility of the favorable future of Shandiz in 2029. It is therefore suggested that the above factors should be focused on for achievement of a favorable future in the city in the field of tourism. Moreover, it will bring about greater stability in the favorable scenario to change the architectural pattern from traditional to postmodern, whereas the destruction of the traditional fabrics and agricultural lands in the unfavorable scenarios will lead to other destructive effects and threaten the sustainable development of tourism in the city.ConclusionThe findings demonstrate that the destruction of traditional fabrics in the unfavorable scenarios of tourism development in Shandiz exhibits greater stability than the other assumptions. Overall, the optimal scenario for the future of the city is more stable and robust. For establishment of a sustainable space for tourism, therefore, it is suggested that the preservation of the traditional urban space and proper management of land use changes be emphasized. Thus, sustainable development of tourism in Shandiz can be achieved if the favorable scenario proposed in this study is adopted, which emphasizes the enhancement of traditional features in a context consistent with the culture, balanced distribution of constructions with residential, commercial and tourist reception, and accommodation and recreational uses, preservation of agricultural lands and gardens, improvement of the quality of communication services, connection of the new and old fabrics, improvement of architecture in accordance with the local culture and materials, and modification of the architectural pattern from traditional to postmodern.
