Application of Handheld Mobile 3D Laser Scanner Based on GeoSLAM in Railway Survey
At present,in the process of railway survey and design,some working points are affected by GNSS signal in order to obtain the terrain of these station areas more efficiently and accurately,this paper introduced the mobile 3D laser scanner based on GeoSLAM into the railway survey work.By comparing the data acquisition efficiency and accuracy of traditional measurement means,the experimental data of different stations such as Bridges,towers and houses are used,and the cartographic accuracy requirements of station topographic maps were referred to.The accuracy of the experimental data was verified,the applicability of GeoSLAM mobile 3D laser scanning technology for different work points was analyzed,and a set of technical system for data acquisition based on GeoSLAM mobile 3D laser scanner was summarized by discussing and analyzing the acquisition route planning,the layout scheme of point cloud matching control points and the field acquisition process.The results show that compared with traditional measurement techniques,GeoSLAM mobile 3D laser scanning technology can achieve"one acquisition,should be fully mined",without repeated operations,laser point cloud data accuracy can fully meet the accuracy requirements of railway survey site topographic map mapping.
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