Explained: What is the Mumbai Civic Body 3D Mapping Initiative?


The Brihanmumbai Municipal Corporation (BMC) has completed the first 3D (three-dimensional) mapping an administrative district in Mumbai which largely covers the Worli region. The company said the project will help the city improve urban governance, modernize infrastructure, manage disasters, etc.

What is the 3D mapping done by BMC in Mumbai?

3D or three-dimensional mapping is the process of preparing a map of the city’s natural areas such as water bodies, open spaces, trees and man-made features such as roads, buildings and infrastructure in digital format. This is the first time that a 3D city model in Mumbai is prepared.

On September 24, BMC completed a 3D mapping pilot project of the G-south district, one of Mumbai’s administrative districts, which covers areas like Worli, Mahalaxmi and Elphinstone Road. Now, the G-sud district, which covers 10 km², has its own “digital twin”, like many other international cities. Digital Twin is a virtual model which is the exact copy of a physical object. Basically now every little detail like the population, civic facilities, houses of Worli is available in 3D and can be used in planning the development work.

The 3D map will be uploaded to BMC’s private cloud from where it can be accessed by the company’s various departments on a web application.

Mapping of the G-Sud neighborhood began on January 26, but was delayed due to the second wave of COVID-19. It has been completed within the past two months. State Environment Minister Aaditya Thackeray, who is also an MP for Worli constituency, said 3D mapping will be done in other parts of the city as well.

The pilot project was taken over by Genesys International Corporation Ltd, a company that provides advanced mapping, surveying and geospatial services.

What are the benefits of this project?

The BMC said the 3D model of the neighborhood would help on various fronts, such as creating a development plan and master plan, detecting unauthorized changes, building plan approval system, planning detailed infrastructure of roads, bridges, planning of the 3D flyover, analysis and comparison of two alternative designs, modeling of urban flooding. Currently, planning is carried out on two-dimensional maps and its precise modeling for infrastructure developments or disaster management is difficult.

But to meet the demands of 21st century cities, it’s important that city organizations can visualize their cities in 3D where they can get 360-degree views, undertake simulations, and perform detailed data analysis. Experts said these three-dimensional maps have the potential to help city planners meet local goals of climate resilience, economic development and housing.

What technology and what tools were used for the mapping?

For 3D mapping, geospatial technology was used, which is a combination of Global Positioning System (GPS), Geographic Information System (GIS) and Remote Sensing (SAR). Along with this, drones were flown to capture high definition images of the entire area, and mobile street imaging vehicles fitted with light sensing and ranging (LiDAR) sensors were part of the creation. of the virtual model. Geospatial technology further assists in analysis, simulation, visualization and modeling.

How long did 3D mapping take?

Depending on the complexities of the cityscape, the permissions required to conduct surveys, the number of features to be digitized, the different tools and features to be developed, it takes anywhere from a few weeks to a few months to complete the 3D mapping project. The 3D mapping of the G-sud district took about two months and it was a pilot project to assess the feasibility of the technology and its practical uses.

What is the cost of the project?

The pilot project was undertaken by BMC with assistance from Genesys International Corporation Limited under the Corporate Social Responsibility (CSR) fund. As it was funded by CSR, the Mumbai company didn’t have to spend any money.

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