LiDAR Survey for Rail Corridor (LiDAR Technology)
- Indian Railways will use LiDAR technology to conduct ground survey for the Delhi-Varanasi High Speed Rail Corridor.
- Recently, data related to ground survey has been obtained using a helicopter equipped with state-of-the-art aerial LiDAR and imagery sensors for LiDAR survey in Delhi-Varanasi high speed rail corridor.
Key point (LiDAR Technology)
- The Delhi-Varanasi High Speed Rail Corridor will connect the National Capital Territory of Delhi to major cities like Mathura, Agra, Etawah, Lucknow, Rae Bareli, Prayagraj, Bhadohi, Varanasi and Ayodhya.
- Light detection and ranging (LiDAR) survey technique is being used in construction works by National High Speed Rail Corporation Limited. With the help of this technique all the details and data related to the ground survey can be obtained in 3 to 4 months, while the process usually takes 10 to 12 months.
- Ground survey plays an important role in the Linear Infrastructure Project, as it provides accurate information about the areas around the railroad.
- The Aerial LiDAR survey will cover an area of 300 meters around the proposed railroad and based on the data obtained from the survey, the design of the railways, the structure, the location for the railway station, the need for land for the corridor, the identification of the plots affected by the project, etc. will be determined.
- It is known that National High Speed Rail Corporation Limited has been entrusted with the task of preparing a detailed project report for the construction of 7 high speed rail corridors. LiDAR survey technique will be used for ground survey in all these corridors.
LiDAR Technology (Light Detection and Ranging Techniques):
- It is a remote sensing method that uses light in the form of pulsed lasers to measure distances on Earth. This system produces light pulses 3D information about the shape of the Earth and its surface characteristics. A LiDAR device consists of a scanner, laser, and GPS receiver. Helicopters and airplanes are the most commonly used platforms for obtaining LiDAR data.
- There are two types of LiDAR – Topographic and Bathymetric. The topographic LiDAR uses infrared lasers to map the land. On the other hand, bathymetric LiDAR measures the height of the river bed and the sea level.
Source – Indian Express
