About the ways to improve the accuracy of mobile laser scanning results

Abstract

Currently, mobile laser scanning technology is increasingly used in large-scale topographic surveys of roads and adjacent areas and in the inspection of the roadway. The advantages of mobile laser scanning technology are the efficiency and accuracy of the results obtained. The article considers the main sources of errors that occur when shooting with the use of mobile scanning systems. The existing and proposed new ways to improve the accuracy of the results of mobile laser scanning are analyzed, as well as a technique for assessing their accuracy. Based on the analysis of survey accuracy indicators using mobile scanning systems, it was concluded that they can be used to perform large-scale topographic surveys of roads and the surrounding area. It was established that the main source of errors is the equipment of the global navigation satellite system (hereinafter referred to as GNSS), which is used to calculate the trajectory of a mobile scanner. Methods are shown by which it is possible to improve the accuracy of shooting in conditions of a weak or absent GNSS signal. The issues of evaluating the accuracy of the results of mobile laser scanning are considered. It is shown that if the exhibition parameters of the components of the mobile scanning system were carefully calibrated, then the main source of errors will be associated with the operation of the navigation unit and lidars.

In particular, with a complete or partial loss of the GNSS signal, as well as with a significant multipath effect, the accuracy of determining the position and orientation of the mobile platform will decrease.