عنوان مقاله [English]
Today, with the advancement and development of technology, various tools are used to obtain information from the surface of the Earth. The utilization of aerial photographs taken by the cameras installed on aircrafts led to the emergence of the science of photogrammetry. In this system, a 3D map of the region is provided by taking images of the area with suitable cover and the image correction process. Subsequently, with the advent of satellite technology, imaging from the surface of the Earth began, and the science of remote sensing came into existence, which acquired information from the Earth actively and passively.
Today active systems in which the sensor, as an electromagnetic wave generator, sends certain wavelengths toward the target and records the return of the waves, have created a new field providing a wealth of information. In general, optical imagery captures only domain information, but other data are recorded by active sensors such as radar and LIDAR. This article introduces the LIDAR system.