摘要
分析了传统地形测绘技术的不足和三维激光扫描技术进行地形测绘的优势。通过2个案例检测分析,在成图比例尺为1∶2 000(沟壑丘陵)和1∶1 000(高山地)时,地物点点位中误差分别为±0.772m和±0.584m,等高线内插点高程中误差分别为±0.756m和±0.416m,满足规范要求。证实了利用地面三维激光扫描技术进行大比例尺地形测绘,在测区面积较大时,能够快速采集大量而精确的点云数据,有效节约人力物力,缩短工期,提高工作效率和经济效益;在复杂地形和危险测区,能够不直接接触危险目标,详细、快速地进行外业数据采集,既能保证人员和设备的安全,又能保证成图精度,并且同样提高工作效率。
The shortcomings of traditional topographic surveying and the advantages of 3D laser scanning technology for topo-graphic mapping was analyzed.Two cases of detection and analysis were carried out,where the mapping scale was 1:2 000 and 1:1 000 for applications in a gully and hilly region and an alpine region,respectively.Map testing indicated that the root mean square error of the testing points was ±0.772 m and ± 0.584 m for the two cases,respectively,and the root mean square error of contour interpolation points was ±0.756 m and ± 0.416 m,respectively.The test results show that 3D laser scanning tech-nology meets the specification requirements.Moreover,results also confirm that it can be used in large-scale topographic mapping of survey areas with complex terrain,especially in those areas that are fault-folding,with a high degree of broken terrain and un-known distribution of dangerous points.Detailed point cloud data can be collected without direct contact with object targets,and data processing and topographic mapping can be done remotely.This technology not only ensures the accuracy of maps but also improves the efficiency of field work.
出处
《中国科技论文》
CAS
北大核心
2015年第9期1014-1018,共5页
China Sciencepaper
关键词
地形测绘
三维激光扫描技术
误差来源
中误差
topographic mapping
3Dlaser scanning technology
error source
root mean square error
