A BASIC STUDY OF MEASUREMENT ACCURACY OF THE UPPER SPACE ASSUMING A TUNNEL CEILING BY MMS

Abstract

 Mobile Mappinng System(MMS) is used for creating road ledgers and inspectong structures. In previous studies institutional verification was condecuted targeting the road surface snd wall surface of MMS. However, accuracy verification for the upper part such as the ceiling has not been sufficiently performed. Therefore, in this study, that measured MMS on the upper part and on the road surface. and this measurement was done at 2 rates, that laser shots is million points per second and fifty thousand points per second. As a result, when the target is installed the upper space and on the road surface, that measurment accuracy of the upper space was good.