07. Research for the unmanned aerial vehicles and Lidar in traffic construction survey

Abstract

The article is an initial study and evaluation of the use of low - altitude Lidar sensors installed on unmanned aerial vehicles in collecting data on existing road surface topography. Research using Lidar Alpha Air sensor AA450, the first scanning product line of CHC Navigation in Vietnam on DJI Matric M300 aircraft and scanning the flight area with a length of 175 m, 110 m wide, the total length of flight is 1804 m in Altitude 80 m, flight speed is 7m/s. Scanned flight data is processed by Copre software, the first version follows the device in both the use and non-use of ground control points for correction. The results from the point cloud were extracted and compared with 264 test points by the single station GNSS-RTK method. The number of points and percentage of deviations in both processing cases are following: With elevation deviations less than 10 cm are 142 and 230 points ( 53.8 % and 87.1 %), from 10 cm to 20 cm are 109 and 23 points (43.1 % and 8.7 %), from 20 cm to 30 cm are 11 and 10 points (4.2 % and 3.8 %), from 30 to 40 cm are 2 and 0 points (0.8 % and 0.0 %).