**1.2.2 The functions of digital railway geographic information platform**

Digital Railway geographic information platform railway main functions are as follows:


#### **1.2.3 The architecture of digital railway geographic information platform**

Railway geographic information platform based on the latest Geographic Information shared services model [11]. Geographic information platform is composed by railway spatial data layer, spatial information services layer, rail service interface layer of geographic information, while the necessary network information infrastructure, standards and normative system, security system, so as to ensure the railway geographic information platform running smoothly. Railway systems and other space-related business applications can be built on the basis of geographic information platform, and through the service interface, invoke the railroad railway geographic information platform provided spatial information services. The overall structure is as follows:

#### **1.2.3.1 Data layer**

GIS data layer of the railway geographic information platform, responsible for the collection, storage, maintenance and management of the railway spatial information, including railway unified common railway spatial information, and extracted from the business system, there are shared values of the professional spatial information, metadata and related attribute data.

effectiveness. To this end, an urgent need to tidy plan the construction of Digital Railway from an unified, standardized aspect, and study an advanced application of scientific and rational, safe and reliable railway geographic information platform for railway infrastructure management and maintenance of spatial information, to provide specifications of the railway geospatial data and spatial information services for business

**1.2.2 The functions of digital railway geographic information platform** 

used in service to meet business services for GIS analysis needs.

**1.2.3 The architecture of digital railway geographic information platform** 

information services. The overall structure is as follows:

Digital Railway geographic information platform railway main functions are as follows:

1. **Railway Spatial Data Management.** Collection, storage, maintenance and management of the national rail spatial information, including common rail base national railway spatial information, and extracted from the business system, there are valuable for sharing of the professional spatial information, metadata and related attribute data. To achieve spatial data of GIS database synchronization and integration between different

2. **Railway Spatial Information Services Management**. Publish spatial information and analysis model, which managed by geographic information, in a standard GIS service delivery style, including spatial data visualization services, GIS data services, GIS function service, GIS directory services. In addition, GIS services can be based on the basic types, custom professional business space in different applications such as passenger and freight space-time statistical analysis of marketing services, and emergency evacuation paths

3. **Railway Geographic Information Service Release.** Provide query, search and locate services on railway spatial information. When the other systems user develop a rail service system, or need to use a GIS data, services, they could through service inquiries, to obtain a specific service path, and call the service and complete implementation of

Railway geographic information platform based on the latest Geographic Information shared services model [11]. Geographic information platform is composed by railway spatial data layer, spatial information services layer, rail service interface layer of geographic information, while the necessary network information infrastructure, standards and normative system, security system, so as to ensure the railway geographic information platform running smoothly. Railway systems and other space-related business applications can be built on the basis of geographic information platform, and through the service interface, invoke the railroad railway geographic information platform provided spatial

GIS data layer of the railway geographic information platform, responsible for the collection, storage, maintenance and management of the railway spatial information, including railway unified common railway spatial information, and extracted from the business system, there are shared values of the professional spatial information, metadata

information systems of the railway.

departments.

the entire business flow.

**1.2.3.1 Data layer** 

and related attribute data.

Fig. 2. The Architecture of Digital Railway Geographic Information Platform

#### **1.2.3.2 Service layer**

The services layer of railway geographic information platform is the critical part to achieve GIS services. The spatial information services layer serves the system and public, who have the needs for the entire railway geographic information and services, and build a unified, distributed, loosely coupled, space GIS services platform for the railway business functions and information services. Geographic information services layer is responsible for publishing the standard GIS services and GIS spatial analysis models managed by geographic information sharing platform, including spatial data visualization services, GIS data services, GIS functional service, GIS catalog services. In addition, GIS services can be based on the basic types, custom professional business space in different applications such as passenger and freight space-time statistical analysis of marketing services, and emergency evacuation paths used in service to meet business services for GIS analysis needs. needs. It will provide different services for outside and inside users.

#### **1.2.3.3 Interface layer**

Railway geographic information platform interface layer is also the railway geographic information services portal, which provides geographic information services portal railway spatial information services available to search and locate. When the other system users develop a rail service system, or need to use a GIS data, services, he can log in railway

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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

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.

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

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

visualization or data services.

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 service and complete implementation of the entire business flow.
