Study on Calculating Rigorously Lateral Link-up Error in GPS Tunnel Control Network Based on Variance-covariance Matrix of Coordinates 基于坐标协因数阵的GPS网隧道横向贯通中误差严密计算方法研究
The designed tunnel axis is given with some references and the points ' coordinates need to be calculated. 隧道设计轴线提供的只是线形要素,每点的空间坐标需要自行求取。