Synkronisering av vägdatabaser med KML och GeoRSS : en fallstudie i Trafikverkets verksamhet

Sammanfattning: Trafikverket, the Swedish Transport Administration, is responsible for data on Swedish roads. The road data are stored in “NVDB”, national road database. Trafikverket delivers, receives and presents large amounts of data. They have several contracts with companies and other agencies for data exchange. Road data has a wide area of use, including as reference system for road-related information, planning of operations and maintenance, planning for road safety, navigation in GPS-equipment, route planning for emergency services, public transport, school transport and transport companies and more. The information obtained from these uses must be proper which requires that the road data is up-to-date, why it is important that any changes and updates on road data are reported to Trafikverket. Collecting new and updated road data is a problem for Trafikveket since the data suppliers not always deliver the data. Apart from those changes and updates, you can also report errors on the road data through a web service that Trafikverket provides. But the web service, “NVDB på webben”, is outdated and uses old technology. Due to these problems, Trafikverket would like to study KML and GeoRSS as potential solutions for error reporting and to send signals about changed data. The aim with this thesis is to do that study. The study consists of a theoretical and a practical part. The theoretical part is based on documents from Trafikverket, literature and other sources. It presents how the road data are handled currently, how KML and GeoRSS works and which mapping services and software that can be used. The practical part contains proposals for technical solutions to signals for changed data and error reporting. It is clear that the KML, together with Google Earth, can be used to mark and describe objects that can easily be attached to an e-mail message. For complete error reporting KML-files with road data are required, so comparisons can be made. It is also clear that a solution with KML and Google Earth would reach out to the public in a better way than the current web service does. Furthermore, KML, in Google Earth, can be used to study roads in three dimensions, which make it possible to study the accuracy of the roads heights. GeoRSS is considered too inefficient to be a better solution than the current when sending change signals to Trafikverket. The technical solution that was created contained too many steps with manual handling for being a good solution.