Application of UAV remote sensing technology in 1:500 topographic map mapping

UAV remote sensing technology is more and more used in topographic map mapping because of its efficient and flexible operation mode, and most of the current remote sensing UAV mapping adopts a single or the same type of UAV joint operation. Taking the Gongqing City Topographic Map Planning Project of Jiangxi Province as an example, this paper adopts two types of UAVs, fixed-wing and multi-rotor, to take aerial photography of the planned survey area according to the oblique and ortho ways, and summarizes the process of image data collection, image data processing, model accuracy verification, digital line drawing production and accuracy verification, and verifies that the image data obtained by fixed-wing and multi-rotor joint remote sensing mapping fully meets the requirements of 1:500 topographic map mapping through accuracy comparison. It shows that UAV remote sensing technology can be applied to the production of large-scale topographic maps.