| Geographic information system(GIS),as a spatial data management system,has the functions of geographic graphics and spatial positioning.It can improve the railway equipment and improve the railway transportation capacity by using GIS technology in train positioning.The train monitoring is different from the existing monitoring system only has simple railway line information,GIS map not only contains the railway line information,also includes around the line of medical points road distribution and other information,the use of GIS technology to development of train positioning visualization system can achieve the dynamic track of the train,to provide decision-making basis for scheduling and auxiliary rescue the disaster of along the railway.This paper designs a GPS and GIS combination of interval train positioning visualization system.Based on the accurate GIS map track data,Use the map matching algorithm to correct the GPS trajectory,showing the real train location.The train positioning system consists of two basic components:the collection location of the train location information(GPS receiver);used to display the specific location of the relevant train,with spatial road map of the geographic information system(design modified high-precision digital map).The main research contents are as follows:(1)Combined with the existing railway technology,proposed the design of the train positioning visualization system.The system through the GSM-R network to achieve information transmission.(2)Using the map matching technology as a means to correct the train location,a comprehensive map matching algorithm for train interval location is proposed for the train positioning visualization system,and a good matching effect is obtained.(3)The train positioning data are measured by the GPS receiver,and the train positioning data is analyzed and processed into the data format available for GIS.At the same time,the Geodatabase data model is used to construct the GIS database,and the mapping and visualization of the railway GIS map are completed.(4)Positioning visualization system using GIS component development,Visual Studio 2013 and ArcGIS 10.2 as a development tool,using C#language programming to achieve the terminal of the positioning system... |
