How to delineate informal settlements/?
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Delineating informal settlements can be achieved through various advanced methods utilizing remote sensing data and image analysis techniques. One approach involves combining very-high-resolution imagery and time-series Landsat data to identify and describe informal settlements based on environmental, settlement, object, and temporal indicators . Another effective method includes using texture-based schemes like contourlet-based multiresolution analysis to capture anisotropic features for informal settlement identification, resulting in high classification accuracy . Additionally, approaches utilizing Remote Sensing (RS) satellite images, such as Histogram Comparison using Bhattacharyya Distance and Hausdorff distance based on Citation-KNN, have shown precision and recall rates, aiding in the identification of informal settlements . Integrating 2D radiometric, textural, and 3D geometric features from UAV imagery has also proven successful in achieving high classification accuracy for informal settlements in diverse geographic locations .
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| Papers (4) | Insight |
|---|---|
| Informal settlements can be delineated by combining very-high-resolution imagery and time-series Landsat data, utilizing object-based machine learning with indicators at different spatial and temporal levels. | |
74 Citations | Integration of 2D radiometric, textural features, 2.5D topographic features, and 3D geometric features from UAV data enables accurate delineation of informal settlements with high classification accuracy. |
12 Aug 2016 4 Citations | Two methods for delineating informal settlements are Histogram Comparison using Bhattacharyya Distance (HCBD) and Hausdorff distance approach based on Citation-KNN, with varying precision, recall, and execution times. |
01 Dec 2019 3 Citations | The paper proposes a texture-based method using contourlet features for delineating informal settlements, achieving high classification accuracy of 93–96% through multi-scale image analysis. |
Related Questions
What are the strategies of informal settlement?5 answersInformal settlement strategies include empowering residents, revitalizing physical structures, promoting economic activities, and creating job opportunities. Additionally, interventions like self-distancing, self-isolation, and protection of vulnerable populations in safety zones significantly reduce outbreak probability and mortality during disease outbreaks. Formalization efforts in informal settlements aim to provide administrative recognition, tenure security, property rights, and access to formal markets for socio-economic development. Furthermore, community-driven and city-led approaches with domestic funding enhance informal settlement upgrading for resilience building, especially in regions experiencing rapid urbanization and climate change challenges. Understanding local barriers, engaging with communities, and addressing collective community strategies of resistance are crucial for successful informal settlement upgrading initiatives.
What are the concepts of informal settlements?5 answersInformal settlements are characterized by their role in accommodating urban populations in the Global South. These settlements often lack basic services like health, education, and infrastructure, leading to community protests and attacks against immigrants. Informality is viewed as an opportunity for innovative citizen-led solutions to real-world problems, rooted in local contexts and resources. Naming patterns in informal settlements, known as toponymic resistance, reflect struggles against oppressive authorities and provide insight into marginalized urban areas. Self-organized initiatives play a crucial role in the incremental development of informal settlements, serving as the primary mode of city-making for the urban disadvantaged and lower middle class.
How to delineate informal settlements?5 answersTo delineate informal settlements, various methods utilizing remote sensing data have been proposed. One approach involves combining very-high-resolution imagery and time-series Landsat data to identify and describe informal settlements, achieving a 95% overall accuracy in mapping. Another method utilizes Medium Resolution satellite imagery derived from Landsat 8, along with Random Forest classification, to detect informal settlements when high-resolution data is not available, showing improved accuracy with the use of open data sources. Additionally, the integration of PlanetScope imagery and Sentinel radar data within a Geographic Object-Based Image Analysis (GEOBIA) framework on Google Earth Engine enables the precise mapping of informal settlements, achieving an 87% identification accuracy and 96% overall accuracy. Furthermore, a texture-based scheme using contourlet-based multiresolution methods has been proposed, demonstrating an overall classification accuracy of 93-96% for identifying informal settlement areas. Lastly, a composite architecture combining multiscale deep learning and contourlet transform has shown promise in identifying informal settlements with an overall classification accuracy of 94.9-95.7%.
What is informal settlements?5 answersInformal settlements are self-organized urban areas that lack basic services, characterized by overcrowding, economic vulnerability, and unhygienic environments. These settlements emerge due to factors like migration, civil unrest, poverty, and inadequate housing options. Residents in informal settlements often engage in incremental self-help initiatives to build shelter outside formal regulations. Despite challenges, informal settlements are seen as innovative solutions to real-world problems, rooted in local contexts and citizen-led efforts. They serve as living laboratories that offer tested solutions for climate change, resource scarcity, social justice, and economic equality, contributing to the creation of more livable cities.
What is Informal Settlements?4 answersInformal settlements are self-organized forms of urbanization that develop in cities of the Global South. They are characterized by a lack of basic services, overcrowding, economic vulnerability, and an unhygienic urban environment. These settlements often arise due to poverty, poor living conditions, constant evictions, and demolitions. Informal settlements have become the primary mode of housing production for the urban disadvantaged and lower middle class in the Global South. They are material expressions of internal and cross-border migration, providing residence for new arrivals in search of economic opportunities. The lack of provision of basic services and resources from the government in these settlements often leads to community protests and attacks against immigrants residing in these communities. The naming patterns in informal settlements provide a unique lens into the struggles and resistance campaigns of marginalized groups against oppressive authorities.
Theories can use about informal and formal settlements?5 answersTheories about informal and formal settlements can be derived from the abstracts provided. One theory suggests that informal settlements are not solely a problem in developing countries and that the distinction between formality and informality is still relevant. Another theory highlights the collusion of different logics, such as market, rational-comprehensive, participation, and resistance, which contribute to the growth of informal settlements. Additionally, the visibility and image of informal settlements within the formal city play a role in their emergence and place identities. Another theory focuses on the vulnerability of informal settlements to natural hazards and the importance of policy environment in managing disaster risk. These theories provide insights into the complexities and dynamics of informal and formal settlements, highlighting the need for a comprehensive understanding and approach to address the challenges they pose.