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对人机交互式铁路定线设计系统中铁路线路平面改善的人机交互界面设计、地形图绘制、图形快速缩放以及纵断面优化初始可行解等一系列问题进行了研究，并开发了有关软件系统。实际应用表明，使用该软件系统可比传统设计提高设计工效２０倍左右，降低铁路建设投资８％左右。
In this paper, a series of problems such as human-computer interaction interface design, topographic map drawing, rapid zooming of graphics and initial feasible solution of longitudinal section optimization of railway line plane in human-computer interactive railway alignment system are researched, and the related software system . The practical application shows that using the software system can improve the design efficiency about 20 times than the traditional design and reduce the railway construction investment about 8%.