Lidar, which stands for Light Detection and Ranging, is a remote sensing technology that uses light pulses to measure distances to objects and create detailed 3D models of the environment. Lidar systems typically consist of a laser scanner, a GPS receiver, and an inertial measurement unit, which work together to collect accurate and high-resolution data about the shape and characteristics of the Earth's surface. Lidar is commonly used in various applications such as forestry, urban planning, archaeology, and climate research. It can also be used for mapping terrain, detecting objects, and monitoring the environment.