Drones, Lidar And Other Modern Technologies To Power Asia's Largest Slum Redevelopment Survey In Dharavi

The Dharavi Redevelopment Project, an initiative to transform Asia's largest slum, is harnessing state-of-the-art technologies to conduct a comprehensive survey, marking a shift in slum rehabilitation practices in India. Leveraging drones, Light Detection and Ranging (Lidar), and mobile applications, the DRP aims to ensure precision, transparency, and efficiency in mapping Dharavi's structures and inhabitants.

Traditionally, slum surveys relied on manual methods and basic tools, often leading to inaccuracies and inefficiencies. However, the DRP has embraced cutting-edge innovations to create a "digital twin" of Dharavi — a virtual, three-dimensional replica that provides authorities granular data for planning and execution.

"Technologies like Lidar and drones have revolutionised how we collect and analyse data in such a dense urban area," said an official from the Slum Rehabilitation Authority, which is overseeing the DRP. The digital twin not only aids in determining resident eligibility for rehabilitation, but also streamlines dispute resolution and minimises errors.

Portable Lidar systems, such as backpack-mounted scanners, are bring used to navigate Dharavi's congested lanes. By emitting laser beams, the Lidar captures detailed 3D spatial data, creating accurate maps of buildings and terrain in record time.

Aerial surveys with drones provide an overhead view, enabling planners to visualise Dharavi's complex layout and identify key areas for intervention.

Survey teams are using digital apps to collect door-to-door data directly from residents. These apps link the data to specific locations, ensuring accuracy and eliminating paperwork-related delays.

The DRP-SRA is also prioritising transparency and trust-building within the community. Fear of fraud and concerns about misuse of personal data remain significant hurdles. To address these, the project has rolled out extensive Information, Education, and Communication initiatives. Activities include distributing informational pamphlets, hosting community meetings, and establishing dedicated call centers to resolve queries.

"Our field supervisors are integral to this process. They ensure residents understand the importance of the survey and assist them in gathering the required documents," the DRP official added. Residents who submit their documents receive acknowledgement slips with details about the next steps, while those unable to do so are guided on how to complete the process.

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