The application shows the map of the London train network as a background. It provides a list of station for departure and destination stations and a shortest path function. The result of shortest path will be shown using a high-light graphic. After finding a shortest path, a report is generated to list a route and the stations in the shortest path result.
Figure 4. The application system of the London train network application
Figure 4. The report of the shortest path
6. Conclusion
This paper has reported the development of the software system that is able to combine data from different data sources through the web and conduct network analysis from those datasets. The advantages of using geospatial interoperable standards and specifications (e.g. GML) have shown the important role interoperability standards have, not only for this implementation but also to the GI community at large. Using GML means that we do not worry about the formats of datasets. Using a web based approach for sharing data maintains data ownership at source but ensures the ability to share that data through various protocols. The system developed shows the possibilities for developing complex analytical GIS applications without regard for proprietary data formats using interoperable standards, interfaces and formats.
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