Terrestrial LiDAR Surveying

Terrestrial LiDAR (Light Detection and Ranging) is a ground-based remote sensing method used to capture detailed 3D spatial data of real-world environments. It operates using laser scanning devices that are typically mounted on tripods, vehicles, or portable backpack systems, depending on the application and terrain.

The system works by emitting rapid pulses of laser light—often thousands to millions per second—toward surrounding objects such as buildings, terrain, vegetation, or infrastructure. When each laser pulse hits a surface, it is reflected back to the sensor. By calculating the time it takes for the pulse to travel to the target and return, the system determines highly accurate distances.

These distance measurements are then combined with the scanner’s position and orientation to compute precise three-dimensional coordinates (X, Y, and Z) of the scanned environment. The result is a dense “point cloud” that represents the shape, structure, and spatial characteristics of the area in great detail, enabling applications in mapping, engineering, construction, forestry, and surveying.