基于数据库的数模在公路CAD中的应用

Application of Database?based Digital Terrain Model on Computer Aided Design for Highway Alignments

着重于数字地面模型 (DTM)在公路路线CAD的实用技术 ,介绍在AutoCAD图形环境下 ,基于ACCESS数据库的数字地面模型的排序分格、构网、优化、交互编辑及生成纵、横地面线和三维地面模型 ,有较好的理论与实用价值。

In order to improve the applied techniques for digital terrain model (DTM), this paper presented a new way with the help of ADS/ARX development kit and database management to construct DTM(Triangulation Irregular Network) graphically and dynamically on the AutoCAD environment. The main works of DTM range from the ordering of dispersed terrain points, the editing of points, feature lines or forbiddenarea, the optimizing of triangulation, the evaluating formed DTM and finally the creating of 3D terrain. As all the above operations were based on database management, it showed some advantages which the traditionally methods do not have. Therefore, the quality and and efficiency of highway alignments design was better than before.