**1.4.2.3 Railway spatial data exchange standards**

The core figure of Digital Railway is share, so data exchange format standardization of GIS spatial data is also a very important part.

Digital Railway should achieve data exchange between data providers and data users in different GIS platform through data exchange format. Therefore, it should be able to: support the commonly used data formats such as DXF, DWG, TIF, IMG, etc.; support the de facto standard exchange formats such as SHP, E00, etc.; support the national standard exchange formats, such as VCT and so on.

#### **1.4.2.4 Railway GIS shared services standards**

The shared services provided by Digital Railway Geographic Information platform should be able to support heterogeneous GIS system even non-GIS system to read and call, to reach the purposes of data integration and function sharing of system. To achieve this purpose, Digital Railway geographic information platform use service-oriented architecture, involves a lot of interoperability standards.

#### **1.4.2.5 OGC standards**

For GIS application services of Digital Railway, it is essential to provide standard OGC services. The OGC standard services include WMS (Web Map Service), WFS (Web Feature Service), WCS (Web Coverage Service).

#### **1.4.2.6 SOA architecture standards**

In Railway Geographic Information platform, in addition to providing spatial data share using OGC service, should also provide a variety of more advanced GIS map services and geographic analysis services for external which are OGC standards cannot be achieved. We should provide standard Web Services through SOA architecture to provide a variety of GIS mapping services and geographical analysis services. Therefore, Digital Railway construction will also need to follow some of the SOA architecture standards, including WSDL (Web Services Description Language), UDDI (Universal Description, Discovery and Integration), and SOAP protocol (Simple Object Access Protocol).

#### **1.5 Conclusion**

Digital Railway is the direction of railway system development and construction, which based on the transformation and improvement of existing railway information system, and

**Section 4** 

**Emerging Web Informatics and Applications** 

it plays an important role to enhance the level of railway management, service and images, and to ensure transport safety. This chapter first discussed the background, content and characteristics of Digital Railway construction, and established a general framework for Digital Railway and analyzed its main study content and basic information platform. Carry out depth research on Digital Railway geographic information platform important part of Digital Railway, analyze its location, function and present the overall structure and application mode. It combined with material carrier and core business of Digital Railway, put forward system composition of Digital Railway information system, including Digital Railway infrastructure and mobile, planning and design, engineering construction, transport organization, passenger and freight services and management applications. Finally, analyze and give key technologies and core information standards of Digital Railway. By the construction of Digital Railway, it will realize the digital upgrade and transform of existing railway system to achieve digital railway operation. The development and construction is a continuing process, and it will lay a foundation for intelligent, green, and sustainable development of the modern railway.

#### **2. References**

