what is lIdar mapping?

LiDAR — Light Detection and Ranging — is a remote sensing method used to examine the surface of the Earth.

Light Detection and Ranging, or Lidar for short, is a type of remote sensing that measures ranges (variable distances) from the Earth using light from a pulsed laser. Together with other data that the airborne system records, these light pulses produce precise, three-dimensional information about the Earth's shape and surface characteristics.

The main components of a LiDAR instrument are a laser, a scanner, and an survey-grade GNSS receiver. The most popular platforms for gathering LiDAR data over large regions are aircraft and helicopters. Topographic and bathymetric LiDAR are two different kinds. While bathymetric lidar also measures heights of the seafloor and riverbeds using water-penetrating green light, topographic LiDAR generally maps the land using a near-infrared laser (Class 1 Laser).

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