Ontology model of information sharing for heterogeneous GIS-T in freeway network

In regard to the heterogeneous problem of GIS-T information representation in Chinese freeway network,an ontology-based solution for information sharing in GIS-T was proposed by studying the reasons of heterogeneity.A freeway network ontology(FNO) model was set up with traffic information units as abstract topology,geometrical components,linear reference system,attached facilities and dynamic data.The consistent representation of transport information with FNO was explained in the case study of suburban freeway network surrounding Xi'an.Analysis result shows that all GIS-Ts have the common understanding of transport information according to the consistent semantics implied from FNO,and better perform transport information sharing.So FNO model is capable of increasing the interoperability of heterogeneous GIS-T,and promotes the upper applications such as transport information management,integrating and sharing.2 tabs,5 figs,15 refs.