Question2: Please provide the arrangement plan of the station and yard with elevation of surrounding roads and control points.
问题2：请提供带有周边规划道路及控制点标高的站场平面布置图。
2
The simulation results indicate that the pseudo-range remaining errors will be increased with the distance between base-station and GPS user and in the case of low satellite elevation.
In the case of quick construction, the elevation of shaft is measured by means of total-station instrument, which possesses advantages of simplicity, speediness, low cost, high precision.