Research for Technique of Estimating Break Line for As-built Management with Plans of Design Drawings and Point Cloud Data

Abstract

Recently, standardization of the as-built management using point cloud data for river banks and expansion of engineering species to be managed are being studied. However, in the case of using point cloud data, boundary line (break line) of change in cross section of structure required for the asbuilt management is ambiguous. Therefore, it is difficult to estimate break line. In the existing research, there is a method to estimate the intersection lines at the crown surface and the slope face using Digital Mapping (DM) data or manually entered line. But it is impossible to apply the existing method to the completion of making bank and concrete block with DM data. Also, it is difficult to extract points measured break line needed for as-built management. In this work, we develop a technique for extracting break line using the shape of structure written on the design drawings, and then we evaluate its effectiveness.