نوع مقاله : مقاله پژوهشی
نویسندگان
گروه جغرافیا و برنامهریزی شهری، دانشکده علوم اجتماعی، دانشگاه محقق اردبیلی، اردبیل، ایران.
چکیده
گسترش تخلفات ساختمانی در بافتهای شهری، تنها بهمعنای نادیدهگرفتن ضوابط فنی و قانونی نیست، بلکه بازتابی از اختلال در نظامهای سیاستگذاری زمین، ناکارآمدی فرآیندهای صدور مجوز، ضعف نهادهای نظارتی و خلأهای حقوقی در ساختوساز شهری است. این پدیده در بسیاری از شهرهای ایران به معضلی ساختاری بدل شده که پیامدهایی نظیر رشد سکونتگاههای غیررسمی، آشفتگی کالبدی، کاهش کیفیت محیط شهری و تضعیف نظم فضایی را در پی داشته است. با وجود گسترش ادبیات پژوهشی، همچنان کمبود مطالعات دقیق با رویکرد دادهمحور و تحلیل مکانی_زمانی در مقیاس شهری محسوس است. پژوهش حاضر با هدف تحلیل نوعشناسی، تراکم و الگوی فضایی تخلفات ساختمانی، به بررسی ۲۳ هزار و 897 پرونده ثبتشده در کمیسیون ماده ۱۰۰ شهرداری اردبیل طی سالهای ۱۴۰۰ و ۱۴۰۱ پرداخته است. رویکرد پژوهش توصیفی_تحلیلی و ابزار آن سامانه اطلاعات جغرافیایی (GIS) بوده است. برای تحلیل خوشهبندی فضایی و جهتگیری مکانی، از مدل میانگین نزدیکترین همسایگی(ANN)، منحنی انحراف معیار و مدل تخمین تراکم کرنل استفاده شده و نقشههای توزیع تخلفات نیز بهصورت جداگانه ترسیم گردیده است. نتایج نشان میدهد سه نوع تخلف «احداث مغایر با پروانه» (۷۹۳۴ مورد)، «ساخت اعیانی مازاد» (۵۹۵۷ مورد) و «احداث بدون پروانه» (۴۵۰۲ مورد) بیشترین بسامد را داشتهاند. مناطق ۲ و ۳ شهری تراکم بالاتری داشتهاند و منطقه ۴، با وجود محرومیت کالبدی، آمار کمتری از ثبت تخلفات را نشان داده است. همچنین در سال ۱۴۰۱ نسبت به سال قبل، کاهش دو هزار و ۶۳۹ موردی در مجموع تخلفات رخ داده است. یافتهها میتواند مبنایی برای بازنگری سیاستهای کنترلی، بهبود سازوکارهای نظارتی و توسعه سامانههای مکانمحور برای پایش مستمر ساختوسازهای شهری باشد. یافتههای تحلیلی فضایی نشان داد که تخلفات ساختمانی بهصورت خوشهای و متمرکز در مناطق مرکزی شهر تمرکز یافته و حدود یکچهارم مساحت شهر بهعنوان خوشههای پرتخلف (High-High) شناسایی شده است.
کلیدواژهها
موضوعات
عنوان مقاله [English]
Spatio-Temporal Analysis of Building Violations based on the Violation Types Using GIS (Case Study: Ardabil City)
نویسندگان [English]
- Roya Moghabeli
- Alireza Mohammadi
- Mohammad Hassan Yazdani
Department of Geography, Faculty of Social Sciences, University of Mohaghegh Ardabili, Ardabil, Iran.
چکیده [English]
Highlights
Spatial clustering of building code violations identified using GIS-based methods.
Central districts exhibit higher densities of permit-related violations.
Peripheral areas are dominated by non-permit constructions.
Hot spot analysis and Local Moran’s I reveal statistically significant clusters.
Findings support spatial justice-oriented interventions and urban management reform.
Introduction
Building code violations represent a major urban management challenge in many developing countries. These violations are not merely infractions of technical and legal regulations but often reflect deeper systemic issues, such as weak governance, ineffective land policies, inadequate monitoring systems, and institutional inefficiencies. Despite the presence of regulatory frameworks such as Article 100 of the Iranian Municipal Act, enforcement in practice often takes the form of financial penalties rather than effective deterrents, leading to the widespread normalization of unauthorized construction.
In Iran’s mid-sized cities, including Ardabil, such violations increasingly affect urban planning processes, undermine spatial justice, degrade environmental quality, and accelerate informal urban growth. Nonetheless, relatively few studies have examined building violations from a data-driven, GIS-based perspective. This research addresses this gap by conducting a spatio-temporal analysis of building code violations, with the aim of providing a clearer picture of violation patterns, identifying institutional bottlenecks, and offering evidence-based recommendations for urban management reform.
Theoretical Framework
This study is grounded in three complementary theoretical perspectives. Spatial Justice Theory emphasizes that uneven enforcement of urban regulations produces spatial inequalities, whereby areas with weaker oversight experience higher concentrations of violations and consequently lower levels of environmental and social equity. Broken Windows Theory suggests that tolerance of minor infractions fosters broader regulatory non-compliance and urban disorder, underscoring the importance of early and consistent intervention. Complex Urban Systems Theory conceptualizes cities as dynamic systems in which localized violations can propagate spatially and temporally, generating emergent patterns at the city scale.
Operationally, Geographic Information Systems (GIS) provide an effective framework for translating these theoretical perspectives into spatially explicit analysis. In this study, GIS-based techniques—including Kernel Density Estimation (KDE), Average Nearest Neighbor (ANN), Standard Deviational Ellipse, Hot Spot Analysis (Getis–Ord Gi*), and Local Moran’s I—are used to examine clustering, density, directional trends, and statistically significant spatial patterns of building code violations.
Methodology
The study adopts an applied, descriptive–analytical research design. The dataset consists of 23,897 building code violation cases recorded by the Article 100 Commission of Ardabil Municipality during 2021–2022 (1400–1401 SH). Each record includes information on violation type, geographic coordinates, date of registration, and administrative district. All cases were geocoded and analyzed across Ardabil’s five municipal districts and 44 neighborhoods using ArcGIS software.
A multi-model spatial analysis framework was implemented. Kernel Density Estimation (KDE) was used to identify high-density areas of violations; the Average Nearest Neighbor (ANN) index was applied to assess the overall pattern (clustered, random, or dispersed); the Standard Deviational Ellipse was used to capture the main directional trend of violations; and Hot Spot Analysis (Getis–Ord Gi*) together with Local Moran’s I were employed to detect statistically significant clusters and outliers of high and low violation intensity. The analytical focus was on uncovering spatial patterns, identifying areas of concentrated violations, and comparing temporal changes between the two study years.
Results and Discussion
The results indicate that building code violations in Ardabil are spatially uneven and highly clustered rather than randomly distributed. Three dominant categories of violations were identified. The most frequent category involved non-compliance with permit conditions, typically reflecting deviations from approved building plans. The second most common category was exceeding authorized floor area, indicating systematic overbuilding beyond the legal limits. The third major category consisted of construction without any permit, predominantly observed in peripheral and rapidly urbanizing areas.
Spatial analysis showed that central and semi-central districts—particularly Districts 2 and 3—exhibited the highest density of permit-related violations. These areas correspond to zones of higher land value and intensified development pressure, where economic incentives appear to outweigh regulatory compliance. In contrast, peripheral districts displayed a higher proportion of non-permit constructions, likely influenced by weaker monitoring capacity, lower formal land supply, and stronger informal development dynamics.
Hot Spot Analysis (Getis–Ord Gi*) and Local Moran’s I confirmed the presence of statistically significant high–high clusters of violations along central development corridors, while cold spots were observed in some outer districts. These cold spots may partly reflect lower levels of reporting and enforcement rather than genuine compliance with building regulations. Directional analysis using the Standard Deviational Ellipse revealed a northeast–southwest axis of concentration, aligning with Ardabil’s main growth and transportation corridors.
Temporally, the total number of recorded violations declined by approximately 11% from 2021 to 2022. While this reduction may indicate improved enforcement or a slowdown in construction activity, the persistence of hotspots in central districts suggests that violations remain a structural and spatially embedded challenge rather than a purely episodic phenomenon.
Conclusion
This study demonstrates that building code violations in Ardabil exhibit distinct spatial and temporal patterns shaped by regulatory practices, development pressures, and uneven monitoring capacity. Peripheral districts are characterized by a predominance of non-permit constructions, while central areas concentrate overbuilding and permit deviations. The findings highlight the limitations of penalty-based enforcement and underscore the need for proactive, spatially targeted monitoring strategies and more consistent regulatory implementation.
By integrating multiple GIS-based analytical tools, the research provides a comprehensive understanding of the geography of building code violations and offers practical insights for urban managers seeking to prioritize interventions in high-risk zones. The study contributes to the urban planning and urban management literature by linking spatial justice concepts with empirical GIS analysis, reinforcing the role of spatial data and spatial statistics in advancing more equitable and effective urban governance.
کلیدواژهها [English]
- Building Violations
- Spatial Analysis
- Article 100 Commission
- GIS
- Urban Management
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