Abstract

The paper presents results of satel lite surveying of the railway's rout es, which have been conducted just after starting in Poland (in 2008) the Active Geodesy Network ASG-EU POS. Afterwards it was possible to effectively utilize the GNSS survey ing results for the inventory of the (exploring) railways in service. Already at the beginning of 2009, the research team from Gdansk University of Technology and Naval Academy in Gdynia, with the cooperation of the Po lish Railway Lines - Railways Department in Gdynia and the Leica G.A. company, applied a method of conti nuous satellite surveying of the railway track with the use of GPS antennas installed on a railway vehicle. From the beginn ing of the resear ch until now, the method has been successfully improving. As it turned out, the measurements deliver very pr ecise information, which are useful in the railway route's horizontal layout assessment. It was basic in working out an original computer program. The implemented algorithm allows one to visualize the an alyzed route, as well as evaluate necessary geometrical parameters in order to assess both straight and curved tr ack sections. Moreover, the user obtains a polygon of the main direct ions of the analyzed route. On the basis of that research, the new method of the horizontal layout designing was established. The method is adapted to the satellite measurements and allows the representation of the whole intersection area between main directions (circula r arc with transition curves) by the mathematical formulas in a local coordinate system. And finally, such an approach allows one to genera te the coordinates of the designed layout in the global system of spatial reference.

Authors (3)