荆江河道GPS与全站仪边长及方向改化

在区域范围较大的工程测量中,需对方向和边长观测值作归化改正和投影改正,但这一点常被许多测绘工作者忽略,因而造成不能对工程测量的结果加以正确的处理,甚至怀疑观测精度不够,还需加以复测,这给工程的进度造成了不良影响。以在荆江河段河道演变监测控制测量中对方向和边长观测值作归化改正和投影改正为例,阐述了边长及方向归化改正的具体方法及改化过程,通过改化计算,同时也说明全站仪导线边长测量成果经改化后能满足后续工程勘测精度的要求。

Research on Distance and Direction Correction of GPS and Total Station Measurements in the Jingzhou Section of Yangtse River

This paper illustrates the course of distance and direction correction of GPS and Total Station measurements in the evolvement monitoring of Jingzhou section of Yangtse River. This can be often ignored in the engineering survey, and thus some data can＇t be handled correctly, and this may cause person to doubt observation precision is not enough, or need to be re-measurement, which gives the progress of the project a negative impact. This paper illustrates the specific methods and process correction of distance and direction, and after the correction computation, the outcome can meet the requirements of precision engineering. This shows that it is necessary to do distance and direction correction in long distance range.