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Michael Owonibi

Name:              Michael Owonibi (ESSReS PhD student)
Institute:           Jacobs University, Bremen
Department:     Computer Science
Phone:             +49-(0)421-200 3050
Email:               m.owonibi(at)
Web link:

PhD-project title: Dynamic Resource-Aware Decomposition of Geoprocessing Services Based on Declarative Request Languages


Current trends in distributed geoprocessing specify the use of composite web services. However, the implementations do not address concerns such as the dynamic and optimized composition of services for data intensive, computationally expensive geoprocessing problems. Efforts directed at dealing with this involve modeling of the process (as a query) separately from service composition itself. The problem addressed in this research is the investigation of mechanisms to efficiently distribute a web service request, which is a declarative raster data processing query, across several nodes as sub-requests; managing the execution of those sub-requests and aggregating their results. The query is based on Web Coverage Processing Service language. In this project, a service will be decomposed into component web services (which are then orchestrated) based on the semantics of its query request, service cost and service query optimization techniques.


Start of doctoral thesis: 19 September 2008

Thesis Committee:

Supervisor: Prof. Dr. P. Baumann (Jacobs University)

Co-Supervisor:   Prof. Dr. A. Zipf (Heidelberg University)

                             Dr. A. Schaefer (Bremen University)


Owonibi, M.; Baumann, P.: Towards a Semantic-Based Automatic Orchestration of Geo-Processing Services. 17th Intl. Conf. on Geoinformatics (Geoinformatics 2009), August 12-14, 2009, Fairfax, USA

Owonibi, M., P. Baumann, 2010: Heuristic Geo Query Decomposition and Orchestration in a SOA. InProceedings of the 12th International Conference on Information Integration and Web-based Applications \& Services (iiWAS '10)

Owonibi, M., P. Baumann, 2010, A cost model for distributed coverage processing services. In Proceedings of the ACM SIGSPATIAL International Workshop on High Performance and Distributed Geographic Information Systems (HPDGIS '10). ACM, New York, NY, USA, 19-26. DOI=10.1145/1869692.1869696

Baumann, P., Brackin, R., and Owonibi, M.: Towards Standards-Based, Interoperable Geo Image Processing Services, , Tim Custworth, Geoinformatik 2011, 14-17 July, 2011, Munster.

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