Grid computing enhances standards-compatible geospatial catalogue service

Authors:
Aijun Chen;Liping Di;Yuqi Bai;Yaxing Wei;Yang Liu
Affiliations:
George Mason University, 6301 Ivy Lane, Ste. 620, Greenbelt, MD 20770, USA and NASA Goddard Space Flight Center, Code 610.2, Greenbelt, MD 20771, USA;George Mason University, 6301 Ivy Lane, Ste. 620, Greenbelt, MD 20770, USA;George Mason University, 6301 Ivy Lane, Ste. 620, Greenbelt, MD 20770, USA;George Mason University, 6301 Ivy Lane, Ste. 620, Greenbelt, MD 20770, USA;George Mason University, 6301 Ivy Lane, Ste. 620, Greenbelt, MD 20770, USA
Venue:
Computers & Geosciences
Year:
2010

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Abstract

A catalogue service facilitates sharing, discovery, retrieval, management of, and access to large volumes of distributed geospatial resources, for example data, services, applications, and their replicas on the Internet. Grid computing provides an infrastructure for effective use of computing, storage, and other resources available online. The Open Geospatial Consortium has proposed a catalogue service specification and a series of profiles for promoting the interoperability of geospatial resources. By referring to the profile of the catalogue service for Web, an innovative information model of a catalogue service is proposed to offer Grid-enabled registry, management, retrieval of and access to geospatial resources and their replicas. This information model extends the e-business registry information model by adopting several geospatial data and service metadata standards-the International Organization for Standardization (ISO)'s 19115/19119 standards and the US Federal Geographic Data Committee (FGDC) and US National Aeronautics and Space Administration (NASA) metadata standards for describing and indexing geospatial resources. In order to select the optimal geospatial resources and their replicas managed by the Grid, the Grid data management service and information service from the Globus Toolkits are closely integrated with the extended catalogue information model. Based on this new model, a catalogue service is implemented first as a Web service. Then, the catalogue service is further developed as a Grid service conforming to Grid service specifications. The catalogue service can be deployed in both the Web and Grid environments and accessed by standard Web services or authorized Grid services, respectively. The catalogue service has been implemented at the George Mason University/Center for Spatial Information Science and Systems (GMU/CSISS), managing more than 17TB of geospatial data and geospatial Grid services. This service makes it easy to share and interoperate geospatial resources by using Grid technology and extends Grid technology into the geoscience communities.