2004 UC Proceedings Abstract
 GEON: Assembling Maps on Demand From Heterogeneous Grid Sources Track: New Technology and System Integration Author(s): Ilya Zaslavsky, Ashraf Memon Integrating spatial information from multiple grid-enabled sources of geologic data is an important component of the NSF-funded Geosciences Network (GEON) project. The spatial integration is orchestrated by Geo-GEMS (Grid-Enabled Mediation Services), a collection of grid services that support spatial data mediation, ontology and schema conflict resolution, and composite map assembly. Geologic data are served by distributed ArcIMS and WMS servers, each wrapped in WSDL/SOAP wrappers. Capabilities of each source are registered at the mediator, so that the latter can plan and orchestrate query execution. To produce a composite result, query results retrieved from individual sources are either merged at the mediator or overlapped at the client. A comprehensive GEON map assembly service represents a temporary mediator-level ArcIMS service that is created on demand to merge individual raster and vector fragments from distributed servers into a composite map and generate answers to follow-up requests without re-querying the sources. Ilya Zaslavsky San Diego Supercomputer Center Data and Knowledge Systems 9500 Gilman Drive, MC 0505 La Jolla , CA 92093 US Phone: 858 534 8342 E-mail: zaslavsk@sdsc.edu Ashraf Memon San Diego Supercomputer Center Data and Knowledge Systems 9500 Gilman Drive, MC 0505 La Jolla , CA 92093 US Phone: 858 822 0017 E-mail: amemon@sdsc.edu |
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