Abstract
The design by three-dimensional CAD begins to be used in the road business. However, three dimensional terrain data doesn't circulate from the measurement phase to the design phase, and also those data that wants to be used by the design phase might not be made. Therefore, three dimensional terrain data is made by the hand input in the design phase, and that not leading necessarily to the efficiency improvement of the business becomes a problem.
In this study, we focused on the enhancement DM that not used from the restriction such as the use environment until now, and examined the circulation of three dimensional terrain data. First of all, we confirmed the adequacy of the enhancement DM by investigating the use environment, the use needs, and the use actual condition of current state. Next, we extracted the problems concerning the circulation of three dimensional terrain data based on the result, and made the DM data creation specification for the road design according to the use scene as an improvement plan of the problem.
