Study On The Urban Railway Location System Based On GIS

Based on the Paper about Railway location design system based on GIS has been studied by my senior sister apprentice ZhangLi,this Paper has applied GIS into urban railway location design and studied the principles of urban railway location design based on GIS; By aiming at the characteristic of urban railway location and set the project utility as the system studied goal,this Paper has alalized the dificiency of PURLS and disussed the key technology of studing the system in detail,basing on the PURLS, the author has developed the urban railway location design system(URLS)in-depth,andhasrealizedsome functions such as designing alignments, vertical profile map. The system can meet the practical location design of urban transport,and users can interact to the system by the way of driving the menu of the software.URLS has good functions of dynamic intercative design between users and the system, and user's operations are simple,convinient and friendly.There are so many interactive tecnologies in the developing of URLS which are discussed in the Paper in detail.For the tecnology which realized the dynamic interacitve design function was named as geometry ineractive edit tecnology based on modelss command which contain delet,insert or move the geometry by interactive tecnology.Other interactive tecnologies such as dialog box,mouse catch and pick up also SFT tecnology of the system has studied in the Paper.URLS has supplied many ways to realize some functionsof the system, users can achieve the aim by interactiving dialogue or graphical interfaces directless.According to the specialty of urban railway loction ,URLS has designed the left and right line and storaged the deisgn datas separately. For the reference points which affect the line wards, URLS has supplied inserting, deledting and moving by dynamic interactive tecnology.Line center entity of plane and vertical profile were defined by the system, the nip points and the drag or drop function are still defined, so the interactive edit function of facing center design line object has realized. According to the requirement of plane design,the system has developed moving ,adding and deleting the point of curves, some functions such as change the redius, angle or the length of curves,move the tangent,add or delet the station or break chain by dynamic interactive tecnology. For the vertical profile ,the system has realized amend the slop,elevation control point and the length of the slop in dynamic interactive way. According to the new design criterion,the system has supplied detect function to check the restrict condition during the design process of plane and vertical profile.URLS also has designed abundant item manage function which can customize or open a exsitent item for users,and it can help users manage the input or result data. In order to meet the demand of design for users, information query function has been developed in the system. Otherwise, System's drawings output is adapt to the needs of users, drawings are saved as "gws" of Geomedia, the user's design results are stored in the database.All the customize command which are developed in the system has been confirmed with a concrete example. It have be fully embodied the operating system the friendly interface and excellent dynamic interactive system capacity. An analytical model for application of urban railway location design has been established also in this paper. The results show that the theories emPloyed and methods Presented in this thesis are seientifie and applicable.