基于SDCORS的车载RTK高程注记点连续采集精度分析

摘要

In order to improve the production efficiency of Digital Line Graphic (DLG)of aerial photography meth-od,reduce the time of field work as much as possible,Vehicle RTK based on Shandong Continuously Operating Reference station System(SDCORS)has been used to collect altitude lettering points.Vertical spots have been col-lected continuously at different time (day and night)with different speed,then compared with the datas gained by using conventional method(Total Station,Single base station RTK),and got the elevation mean square error.It is thought that the accuracy will be high while vehicle spots have been collected at night with the speed of less than 20km/h.In the project of collecting foundational geographic information data of Haiyang city,vertical spots on the road surface within the scope of 346km2 have been collected by using vehicle RTK.It is showed that the results can meet the accuracy requirements of aerial photography with the scale of 1∶500.%为提高航测法数字线划图（DLG）的生产效率，尽可能减少外业作业时间，基于山东省卫星定位连续运行综合服务系统（SDCORS）的车载RTK技术进行高程注记点采集。采用不同时间（白天、晚上）、不同车速条件进行高程注记点连续采集，并与常规方法（全站仪、单基站RTK）采集高程点进行比较，求取高程中误差，认为在夜间以不大于20 km/h的车速进行采集精度较高。在数字海阳基础地理信息数据采集项目中，利用车载RTK采集346 km2范围内的沿路高程注记点，结果表明能够满足1∶500航测法成图精度要求。