The access control lidar factory said that lidar is a system that combines three technologies of laser, global positioning system and inertial navigation system to obtain data and generate accurate DEM. The combination of these three techniques enables highly accurate positioning of the spot where the laser beam hits the object. The access control lidar factory divides it into a terrain lidar system for obtaining a ground digital elevation model, and a hydrological lidar system for obtaining an underwater DEM that has been maturely applied. The common feature of these two systems is the use of lasers for detection and measurement. , which is also the original English translation of the word lidar, namely: LIght Detection And Ranging, abbreviated as lidar.

The access control lidar factory said that the laser itself has a very accurate ranging ability, and its ranging accuracy can reach several centimeters, and the accuracy of the lidar system depends on the laser, GPS and inertial measurement unit (IMU) in addition to the laser itself. The three synchronization and other internal factors. The access control lidar factory believes that with the development of commercial GPS and IMU, high-precision data obtained from mobile platforms through lidar will be widely used.