The application of precise traverse measurement in the northern extended section of line No.2 in Guangzhou subway

Through the application of precise traverse measurement in the northern extended section of line No.2 in Guangzhou subway,the article introduces the design of precise traverse network,field observation of precise traverse and data processing,evaluates the measuring accuracy of precise traverse,and compares the control point coordinate of line No.2 by co-measurement,in order to offer a well reference for further precise traverse measurement of rail transit engineering in Guangzhou.