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NHSRCL begins LiDAR survey for Mumbai-Nagpur High Speed Rail corridor

NHSRCL has started the LiDAR survey for the preparation of a detailed project report (DPR) for the proposed Mumbai-Nagpur High Speed Rail corridor on Friday

NHSRCL starts LiDAR survey for Mumbai-Nagpur bullet train corridor (Representative Image)
NHSRCL starts LiDAR survey for Mumbai-Nagpur bullet train corridor (Representative Image)

New Delhi: The LiDAR survey for preparation of detailed project report (DPR) for Mumbai-Nagpur High-Speed Rail Corridor (commonly know as Mumbai-Nagpur bullet train project) (approx. 736 km) started on Friday, where an aeroplane fitted with state of art Aerial LiDAR and Imagery sensors took the first flight and captured the data related to the ground survey.

The ground survey is a crucial activity for any linear infrastructure project as the survey provides accurate details of areas around the alignment. This technique uses a combination of laser data, GPS data, flight parameters and actual photographs to give accurate survey data.

National High-Speed Rail Corporation Limited (NHSRCL) is adopting 'LiDAR' (light detection and ranging survey) technology which provides all the ground details and data in 3-4 months wherein this process normally takes 10-12 months.

LiDAR is a unique remote sensing technology that has taken the surveying industry by storm. A LiDAR instrument consists of a laser, a scanner and a GPS receiver mounted on a platform. This platform may be mobile or stationary, aerial or terrestrial, based on the needs of the application — the laser, scanner and GPS receiver are the only constants.

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During the Aerial LiDAR survey, 150 meters of the area around the proposed alignment is being captured for the survey purpose. After the collection of data, Three Dimensional (3D) topographical map of the corridor of the proposed alignment on a scale of 1:2500 will be available for designing of the vertical and horizontal alignment, structures, location of the stations and depots, land requirement for the corridor, identification of project affected plots/structures, right of way etc.

To provide clear pictures of the structures, trees and other minute ground details, 100-megapixel cameras are being used for the LiDAR survey.
NHSRCL has been entrusted to prepare the DPR for seven high-speed rail corridors and the LiDAR survey technique will be used for ground survey in all the corridors.

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