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.
The experience of using SDL30 electronic level during tests of the Trinity Bridge in St. Petersburg conducted in May 2003 is described. The deflections of spans were determined by the results of high-precision geometric leveling. The characteristics of the level used and some test results are given. The use of electronic levels significantly reduced the time of leveling and perform a large amount of work by one team of surveyors. It is proposed to use the electronic level, which allows to speed up significantly the measurement process and get rid of the routine work of processing the results.
