本文在师姐张莉研究的《基于GIS平台选线系统开发方法》的基础上，将GIS技术应用于城市轨道交通选线，研究了基于GIS的城轨交通选线原理；针对城市轨道交通选线设计特点，以系统的工程实用化为目标，对既有的基于GIS轨道交通选线原型系统（PURLS）的功能不足进行分析，详细探讨了系统深入研制所需的关键技术，在PURLS的基础上研究了基于GIS的城市轨道交通选线设计系统(URLS)，实现了基于GIS平台的城轨交通选线专业制图功能，基本满足城轨交通选线设计需求。用户对系统的操作通过菜单驱动的方式实现，URLS具备强大的动态交互设计功能，操作简单方便，界面友好。
URLS研制过程中采用了大量的交互技术，文中做了详细的论述。对于实现系统动态交互设计功能的技术，文中将其命名为基于非模态命令的几何实体交互编辑技术，包含对几何实体的交互式删除、添加和移动技术。系统采用的其他交互技术包括：对话框交互技术，鼠标捕捉、拾取交互技术以及系统容错交互技术。系统对很多功能的设计提供多种方法予以实现，用户可以通过对话框交互或者直接与图形界面的动态交互来达到设计的目的。
URLS根据城市轨道交通的线路设计特点，分别对左右线进行设计，并将左右线的设计数据分别存储。对于影响线路走向的控制点，系统向用户提供了动态交互式的插入、修改和删除功能。系统定义了线路平面中心线实体和纵断面设计线实体，并定义了夹点和各类夹点的拖放功能，从而实现面向线路中心线对象的拖放式交互编辑。根据平面设计要求，开发了移动交点位置，增加或删除曲线交点，改变曲线半径，改变曲线偏角，改变缓和曲线长度，平移切线，增加或删除城轨交通车站、增加或删除断链等动态交互设计功能。对于纵断面，主要实现了变坡点的位置、高程、坡度及坡段长度的动态交互式修改。对于平、纵面设计过程中的约束条件，系统按照最新设计规范自动给予违规检测。
系统设计了丰富的项目管理功能，可以为用户提供定制和打开项目的功能，对在方案设计过程中的输入数据和设计的结果数据分类管理，用户可适时对这些数据进行录入、查询或修改。为满足用户设计需要，系统还设计了信息查询功能。另外，系统还可以根据用户的需要进行纵断面设计成果出图，用户生成的图纸以gws格式进行保存，并将用户设计的成果保存到数据库中。
本文通过实例对所研制的系统用户化命令功能进行了测试，测试过程中充分体现了系统操作界面的友好和系统优越的动态交互性能。并通过实例对系统的分析功能进行了应用，验证了基于GIS平台开发城市轨道交通选线系统的正确性和有效性。

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.