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针对车载Li DAR系统在城市道路竣工测绘中所面临的问题,提出了采用城市CORS站替代单基站以差分解算POS,并通过设计试验探明了基于单基站及多基站差分GPS解算POS获得的激光点云数据精度。试验结果表明,基于测区附近3个基准站获得的点云平面精度可达4.9 cm,高程精度可达8.6 cm,能够满足城市道路竣工的精度要求,具有替代近距离单基站差分的潜力。
In order to solve the problems that vehicle Li DAR system faces in the completion of surveying and mapping of urban roads, this paper proposes to use urban CORS stations instead of single base stations to solve POS in shortcomings, and through the design test, it is proved that POS is obtained based on single GPS and differential GPS Laser point cloud data accuracy. The experimental results show that the accuracy of the point cloud plane can reach 4.9 cm and the elevation accuracy can reach 8.6 cm based on the three reference stations near the survey area, which can meet the requirements of completion of urban roads and has the potential to replace the difference of near-single-base stations.