**1.2.5 The application patterns of digital railway geographic information platform**

The Application Patterns of Digital Railway geographic information platform includes internal and external service, and they are respectively reflected by Digital Railway Information Sharing Platform service layer and Digital Railway spatial information services portal.

#### **1.2.5.1 The service layer of digital railway information sharing platform**

The service layer is a key part of railway geographic platform to realize GIS services, and its core function is to provide GIS services. GIS services in Railway geographic information platform include GIS visualization services, GIS data services, GIS services and directory

geographic information services portal for service inquiries. Service portal will call the GIS service management module to access a specific service path. So users can directly call the

According to the railway GIS platform design, the data layer is composed of the

Railway spatial database is composed by the railway common spatial data, and spatial data

1. Railway common spatial data mainly include different scale vector, raster, and threedimensional and other types of data (such as multimedia data), specific data content is divided into two areas: the national base railway map, railway lines vertical section diagram. The railway map based spatial information to provide a national basis, the distribution of the railway line, railway bureaus and the main station spatial information; railway line longitudinal vertical section of the line graph is to describe the base railway spatial information, survey and design drawings by the railway line through the vector data formats obtained after conversion and data processing. 2. Shared professional spatial data refers to the professional spatial information that stored in the certain railway information systems, and has the demand to share, and this part of the information can be copied to the railway geographic information platform for the sharing of other business information systems. The professional spatial information is superimposed on the common spatial information can be used to

maintenance of spatial databases and spatial data management subsystem [10].

3. Railway metadata is mainly contains the metadata of railway spatial data.

Digital Railway spatial database can be divided into three parts by their contents, which are the national common geographic information data, the railway geographic information data

The spatial data maintenance and management sub-system is responsible for the management of the spatial data and metadata, which are stored in geographic information platform, including geographic information platform model and spatial data management, spatial data (vector and raster data) to import, export, convert, copy, append; spatial data quality control, network topology and relationship maintenance; incremental replication and exchange of spatial data; spatial data metadata management, including meta-data

**1.2.5 The application patterns of digital railway geographic information platform** 

Sharing Platform service layer and Digital Railway spatial information services portal.

**1.2.5.1 The service layer of digital railway information sharing platform** 

The Application Patterns of Digital Railway geographic information platform includes internal and external service, and they are respectively reflected by Digital Railway Information

The service layer is a key part of railway geographic platform to realize GIS services, and its core function is to provide GIS services. GIS services in Railway geographic information platform include GIS visualization services, GIS data services, GIS services and directory

service and complete implementation of the entire business flow.

generate the relevant professional expertise layer.

and the sharable railway professional GIS data.

collection, management, publishing and navigation.

**1.2.4 Spatial database** 

can be shared professional and metadata.

services functions. The GIS services can be divided into two levels: the first layer for GIS visualization services (map services and OGC services) and GIS data services (data transform service and spatial data upload service), and the second layer for the GIS functional service (map query service, map locate service, map edit service, spatial information service). Which GIS data visualization and GIS services are the basic types of services, GIS capabilities that can achieve some of the major service-specific features and analysis of GIS services, to achieve GIS functional services need to rely on GIS visualization or data services, and when GIS functions called services, they often need to call the GIS visualization or data services.

In addition to providing features of a variety of GIS services at the spatial information services layer, but also must have created publishing services, service interfaces, service management and security management functions, and provide a variety of standard access interfaces such as SOAP (Simple Object Access Protocol), REST (Representational State Transfer), OGC standard services with web services, for the spatial application of business systems.

The railway geographic information platform services layer design shown in figure 3:

Fig. 3. The Service Layer of Railway Geographic Information Platform

Digital Railway System 185

Various types of sensors of Digital Railway Infrastructure communicate with each other by wireless, cable transmission networks, and rolling stock by means of radio frequency transmission protocol to exchange information. Digital Railway infrastructure contains the station interlocking, line occlusion control, signal control, traction control and power transmission, etc. automatic equipment. Digital Railway infrastructure are more accurate and reliable supporting of ATIS (Automatic Train Number Identification System), disaster prevention and safety monitoring, traffic surveillance, emergency command rescue, transport

Digital Railway mobile equipment generally refers to railway mobile transport capacity equipments (including locomotives, vehicles, EMU, etc.) and the digitalization of trains.

Digital Railway mobile equipment percept all kinds of state information of train operation, including their location, speed, power, air resistance, energy consumption, emissions, load and test monitoring equipment state information; position information about itself and the adjacent train; the infrastructure state inspection information around train running alongside; information of natural and meteorological along the train running; automatic access to scheduling and driving instruction program information; locomotives, vehicles and all kinds of EMU state information; state information of cargo and passengers in carriages,and so on. Digital Railway mobile equipment, through the assembled digital data transmission and communications equipment, realize real-time information communication between the vehicle-based sensors and reliable mass information transmission between train and infrastructure, or between trains. Through real-time dynamic digital platforms, and combine with the digital platforms of operating environment, the model of train status information sensing and monitoring is built, it can realize modern detection for high-speed train, train operation control, digitalization of traction power supply, line public affairs, and digitalization of geographical environment. By data processing integration and intelligent decision-making platform, it can realize the data integration between train and infrastructure, and calculation of self-adaptive, self-test, self-repairing and mandatory safety protection based on knowledge database and intelligent decision. It can provide quality travel services to passengers at journey by building a digital train customer service platform. Digital Railway mobile equipment has carried a large number of digital train control equipment, including train control, power control, over speed protection control, brake control, automatic control of vehicle equipment, control of the train services, and train

Fig. 4. Digital Railway Information Systems

resource management system implementation.

**1.3.2 Digital railway mobile equipment** 
