CONSTRUCTION OF THREE-DIMENSIONAL PARAMETRIC MODEL BASED ON POINT CLOUD DATA OF EXISTING BRIDGE

Abstract

 The Ministry of Land, Infrastructure, Transport and Tourism is promoting the use of three-dimensional models in order to improve the efficiency and sophistication of bridge maintenance. For existing bridges, it is not easy to generate a three-dimensional model that conforms to the specifications from paper drawings. There are many bridges for which no drawings are left, and there is a problem that the drawings cannot be referred to during inspection and the inspection results cannot be recorded in the drawings. In this study, we generated the three-dimensional model from the data measured the actual bridge using the terrestrial laser scanner, UAV equipped with a camera, and Mobile Mapping System. It is used as a basis for recording information related to maintenance. We proposed a method to build a three-dimensional model by applying parametric modeling to the point cloud data. The proposed method was verified using the point cloud data acquired by each measuring device, and showed that a three-dimensional model can be constructed even if some of the data is missing.