Application of intelligent UAV onboard LiDAR measurement technology in topographic mapping

Traditional topographic mapping methods have some disadvantages, such as long working cycle, high labor intensity and easy to be affected by the natural environment, so it is difficult to complete a large area of surveying task in a short time. Airborne lidar measurement technology is a new way to obtain spatial information, which has the characteristics of full digitization, high efficiency, high precision and non-contact, and can easily obtain rich spatial information data. In this paper, the KQ-PSM1500 airborne LiDAR system carried by UAV was used to carry out the topographic mapping work of an area in Anhui Province where the vegetation coverage rate was up to 90% and the terrain height difference was large. Using the acquired Airborne LIDAR point cloud data, the high-precision point cloud 3D model was generated through data processing. The example shows that this method has obvious advantages in the harsh environment of deep mountains and dense forests, and its point cloud accuracy can also meet the requirements of topographic mapping.