Conversion method and conversion system from the completed drawing of the bridge to 3D data

摘要

PROBLEM TO BE SOLVED: To easily and accurately generate three-dimensional data of a bridge from a completed drawing left on a microfilm. SOLUTION: From a step of acquiring digital image data by reading a microfilm on which a completed drawing is recorded by a reading means and recording the digital image data in association with a structure name, and a linear diagram converted into digital image data. A process of detecting a grade, reading the coordinate data written on the grade and recording them in association with each other, a process of giving the coordinate data for each detected score and projecting it onto a spatial coordinate system, and coordinate data. It is characterized by having a step of arranging a line connecting the points that are adjacent to each other in the spatial coordinate system. [Selection diagram] Fig. 5