Abstract:

The application of the piggyback mobile laser scanning system in the mapping of large scale topographic maps is critical to the scanning accuracy. Using the Leica Pegasus Backpack to scan the survey and mapping geographic information building of Suzhou Industrial Park, use Inertial Explorer, Infinity, AoTumatic Processing to preprocess the point cloud data, use RealWorks to extract feature points, and draw the feature points in the MicroStation V8 joint diagram as 1:500 topographic maps. After superimposing the 1:500 topographic map drawn by the traditional method, it is found that the two topographic maps have a good coincidence. After the accuracy analysis of the ground object detection point, the error in the point is 0.026 m, and the error in the elevation is 0.041 m. The results show that Leica Pegasus Backpack meets the accuracy requirements of 1:500 topographic map measurement.

Key words: point cloud data, 1:500 topographic map, precision analysis