About LiDAR

LiDAR is a remote sensing technology that uses visible light to measure distance from an emitter. It creates highly accurate three-dimensional representations of surface features and objects by measuring the time it takes for light reflected from the ground to return to the sensor. An aircraft or unmanned drone is usually used forLiDAR scans comprising up to 100,000 laser measurements per second, commonly referred to as “point clouds”. Each point represents a specific location on the earth’s surface, with three dimensions: the cartesian mapmaker’s “X” and “Y”, (to make a conventional flat two-dimensional map) as well as a third “Z” value corresponding to elevation or height, enabling visualisation in three dimensions. Geospatial information from satellites can be added to provide augmented global coverage.