![]() You may think that the LIDAR technology is much alike RADAR, right? Airborne LIDAR system is a technology in which a laser scanner, attached to an aircraft, such as helicopters, airplanes, or a drone, creates a 3D point cloud map of the landscape.Īirborne system LIDAR is currently the most detailed and accurate method of creating digital elevation models, replacing photogrammetry.Terrestrial LIDAR operations happen on the Earth's surface and can either be stationary or mobile.There are two main classification or types of LiDAR systems: In different LIDAR applications, different types of scattering are used: primarily Rayleigh scattering, Mie scattering, Raman scattering and fluorescence. For example, the optimum combination of wavelengths can allow for the remote mapping of atmospheric contents by detecting wavelength-dependent changes in the returned signal intensityĪ laser beam that is narrow and focused can map features at very high resolutions for example, an aircraft can map terrain at 30-centimetre (12-in) resolution.Īs opposed to a direct reflection one may find with a mirror, LIDAR light is often reflected through backscattering - a phenomenon that occurs when light particles are scattered at angles to the original direction of motion. Wavelengths of LiDAR sensors range from the infrared (10 micrometers) to the ultraviolet (250 nanometers) and can be applied to a variety of substances, including rocks, rain, chemicals, air, clouds, and even single molecules. For instance, a LIDAR mapping program can geo-reference each point in a point cloud to create highly-detailed maps of real-world environments. Yet clouds can be used to store any spatial information and manipulate it for various algorithms, artificial intelligence, machine learning, and other analysis software. In most cases, a point cloud works as a middleman between raw data collected by LiDAR processes and 3D models. ![]()
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