Implementation technique of integrated interactive design of plane, vertical-section and transect of railway line

Multiple Document Interface(MDI),custom entity and reactors technology were used to build the auto-maintenance and inter-edit mechanism of document data of railway line plane,vertical-section and transect.The integrated interactive design of the three dimensions of railway line was implemented.The technical principle and technique were introduced detailed.In this way,the railway line design system based on data-base and AutoCAD document could run favourably and switch smoothly in MDI mode,and the plane,vertical-section and transect drawing of railway line can be interlinked automatically in the course of interactive design.Consequently,the design become more intuitionistic and more convenient,and the consistency of the data of railway line and its influence factors was ensured.