Automatic geographic web service chaining based-on improved and/or graph

Nowadays, more and more geospatial applications are provided by geographic web service chaining. Because of large quantities of geo-services and user´s personality requirement, it needs to consider both functional and quality of service (QoS) capabilities in geo-service chaining. In this paper, we use geospatial web service dependency graph (GWSDG) to represent the dependencies between services and input/output data, then use BGWSCAOG algorithm to generate GWSDG according to use´s request automatically. Finally, we use FOGWSC algorithm to find the GWSC with the global optimal QoS. The implementation of a prototype system and the experimental results show that our approach is not only elegant but also efficient.