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S&T - 12■
LIGHT DETECTION and RANGING SURVEY (LiDAR) TECHNIQUE.
#
Governmentinitiative #GS3
National High Speed Rail Corporation Limited adopts Light Detection and Ranging Survey (LiDAR) technique using Laser enabled equipment mounted on a Helicopter for conducting ground survey for the preparation of Detailed Project Report for the proposed Delhi-Varanasi HSR corridor.□ ABOUT LiDAR◇ It is
remote sensing method that uses light in the form of a pulsed laser to measure ranges to the Earth.
◇ These light pulses—combined with other data recorded by the airborne system—
generate precise,
three-dimensional information about the
shape of the Earth and its
surface characteristics.□ HOW IT WORKS ?
◇ LiDAR follows a principle -
throw laser light at an object on the earth surface and
calculate the time it takes to return to the LiDAR source.
◇ Given the speed at which the light travels, the process of
measuring the exact distance through LiDAR appears to be incredibly fast. ︎
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