PERFORMANCES IN THE DRAWING HIGHWAYS BY RTK PUBLISHEDOctavius Nicolae Coltan, Valeria Ciolac
The survey has been carried out on the trail axis projected on a strip of 50 m on both sides of the shaft with enlargements in the topographic artwork and of intersections, so that the project can develop. The survey has been developed in 70 STEREO system, based on support points whose coordinates were obtained from the National Agency for Cadastre and Real Estate Advertising Arad. On the entire route designed, for a length of about 12 km, five A type terminals and six type B terminals were located. Terminals were located in protected areas, easily accessible by car, being located outside the areas of private property For determining, three references of three fixed points were used, measuring the three vectors for each point. They used six dual frequency GPS receivers, three fixed references, and three mobile rovers. For determining transformation parameters from 84 WGS in 1970 Stereographic in the work area, STATIC GPS, GPS measurements were made using the STATIC method, and using the support points of first order national geodetic network. To obtain more accurate results and to ensure stability and confidence in solutions, specialized software was used in GPS data processing, namely Leica Geo Office. The RTK topographic surveys were accomplished by using 5 Leica GPS 1200 receivers – I reference station and rovers. For every RTK session, after assembling the reference station on a type A landmark, a type B landmark was occupied by a rover receiver in order to compare the new obtained RTK coordinates of the landmark with the previous coordinates, determined STATICALLY. The difference between the coordinates were maximum of 2 cm per after maximum 10 seconds of occupancy.
RTK survey; static measurement; reference station