Author(s)

L.E. Malm

Abstract

All through the railway planning and design process a huge amount of geographic related data is processed. The data assembly techniques varies depending on the need of accuracy for the different stages and from what sources the data can be retrieved. The main methods used for data collection are aerial, field and GPS - survey or by data transfer from existing databases or maps. To make certain that the data keeps the right quality through the whole process is it important to have the possibility to attach attribute data to the objects in use. When data is retrieved from other sources, existing databases and maps, is it necessary that the data can be transferred in a proper way. This means that there has to be standards for data transfer of geographic information including attached attribute data. International standardisation work for geographic information is going in ISO

Keywords