National High Speed Rail Corporation Ltd has commenced a Light Detection and Ranging survey for preparation of a detailed project report for the 736-km Mumbai-Nagpur High Speed Rail Corridor.
An aeroplane fitted with state-of-the-art aerial LiDAR and imagery sensors took the first flight and captured the data related to the ground survey.
An NHSRCL spokesperson said, “We are adopting Li-DAR technology, which provides all ground details and data in 3-4 months, wherein this process normally takes 10-12 months.”
The ground survey is crucial for linear infrastructure projects as the survey provides accurate details of areas around alignment. It uses a combination of laser data, GPS data, flight parameters and photographs to give accurate survey data.
The spokesperson said, “During the aerial LiDAR survey, 150 metres around the proposed alignment is being captured for the survey. After collection of data, a 3D topographical map of the corridor of the proposed alignment on a scale of 1:2,500 will be available for designing of vertical and horizontal alignment, structures, location of stations and depots, land requirement for the corridor, identification of project affected plots/structures and right of way.”
To provide clear pictures of the structures, trees and other minute ground details, 100 megapixel cameras are being used for the survey.
NHSRCL will prepare detailed project reports for seven high-speed rail corridors and the LiDAR survey technique will be used.
Mumbai-Nashik-Nagpur corridor is among seven corridors.