Multi-level Semantic matching of Geospatial Web Services

The appearance of semantic Web makes the automatic discovery and invocation of geospatial Web services become possible. The key technology of automatic discovery is service matching. This paper designs a common semantic service description model, which contains four aspects as the classification of service, input/output, precondition/effect and the quality of service (QoS), to describe the geospatial semantic service by geo-ontology. Then we propose a multi-level semantic web service matching approach which matches the geospatial services on four levels. Finally, a prototype system based on the above models and methods is designed and implemented, and it demonstrates that our solution yields high-quality results under realistic situation.