Study on the positioning efficiency of GNSS RTK for road profile surveys - case study in Vietnam

Abstract

Traditional topographic profile surveying requires numerous stages following mandatory procedures. Alongside
that, the outdated traditional surveying equipment has reduced work efficiency during the surveying process. Currently, the Real Time Kinematic (RTK) method has been widely applied in the construction surveying field in Vietnam. However, this method, according to current technical standards, only allows topographic mapping at a scale of 1:1000 and without profile surveying. Although GNSS-RTK has been assessed to be very effective in construction surveys, there has not been a specific evaluation of the efficiency when topographic profile surveying. In this study, the experimental results with the Trimble R8S device applying RTK principles provided many solutions to increase productivity and efficiency in topographic profile surveying. The accuracy of this method has met the technical requirements for the current traditional technical standards in Vietnam. In addition, the advantages of the RTK technique have helped overcome the difficulties of traditional topographic surveying using a total station or theodolite and leveling devices, especially in terms of time and cost efficiency.