Data on the types of geodetic work performed for the project of repair and control of the railroad track position is given, and it is shown that the lack of a reference network directly near the road leads to additional costs and does not allow to promptly identify deviations from the norms of its maintenance. The purpose and construction of the special reference system, introduced on the railroads of Russia, is considered. The methods of rail track position control are given and the reasons that make it difficult to put the system into permanent operation are analyzed.
The specifics of geodesic network creation for bridge transition across Kama River in the vicinity of Kazan are discussed. The construction of geodesic network consisting of regular shape figures was not possible due to the great length of the bridge transition, features characteristics of the locality and the position of control points, which were chosen for the commodity of construction. Linear-angular network gaunt along the axis of the transition was created. The network was based on the control points located on the short area. Due to these circumstances many additional measurements were done to achieve desirable precision of point positioning. The most reliable line of the net was determined using several variants of adjustment. This line was chosen as the initial for final calculations. The level lines were created in winter time on ice because the control points were separated by rivers. The created geodesic net was used during the following construction of piers of the bridges.
