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Integration of Grid Service and Web Processing Service. Gao Ang State Key Laboratory of Resources and Environmental Information System gaoang@lreis.ac.cn OSGeo China. Agenda. Overview of Grid Technology and Grid Service Grid Technology Grid Service Integrate Grid with Spatial Database
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Integration of Grid Service and Web Processing Service Gao Ang State Key Laboratory of Resources and Environmental Information System gaoang@lreis.ac.cn OSGeo China
Agenda • Overview of Grid Technology and Grid Service • Grid Technology • Grid Service • Integrate Grid with Spatial Database • WPS and Grid Service • WPS Process • Combination with Grid Service • Geospatial data access and Integration • GridGIS Architecture • Integrate Grid Technology with Spatial Database • Our Work: LGrid GIS Prototype • LGrid Architecture • LGrid Snapshoot
Grid Computing Overview • Definition • A service for sharing computer power and data storage capacity over the Internet. • Grid Computing • Resources Management • Data Management • Information Service • Characteristic • Computing resources are not administered centrally. • Open standards are used. • Non-trivial quality of service is achieved. • Analogy • like a power company or water company
Hierarchy of Typical Grid Structure Comparison of sandglass model and core components NOTE: As in the Internet, applications can use capabilities at any level of the stack. Abstractions are provided for convenience.
GT1 GT2 OGSI Have been converging WSRF WSDL 2, WSDM WSDL, WS-* HTTP Grid and Web Services - Integration Grid Web The definition of WSRF means that Grid and Web communities can move forward on a common base WSRF: WS-Resource (Reference: http://www.globus.org/wsrf/)
Original Blueprint of Grid GIS • System Independence Distributing Database • Extension of Geospatial Database • High Level Security Management • Geospatial Service Based on Database • Processing Interface and Service Protocol
Web Processing Service GetCapabilities Request and receive service metadata that describe the abilities of the specific server implementation. DescribeProcess Request and receive back detailed information about process that can be executed by an Execute operation, including the input parameters and formats, and the outputs. Execute Run a specified process implemented by the WPS, using provided input parameter values and returning the outputs produced.
Combination of WPS with Grid Service Geo-Data Services Data access: Easy and efficient access to various types of Geo-data. Data consistency: Consistency can be maintained when Geo-data is modified. Data persistency: Geo-data and its association with its metadata should be maintained. Data integration: Mechanisms for integrating heterogeneous and distributed data under Grid environment. Extensibility Interoperability Security
Data Access and Integration for Geospatial • OGSA-DAI: An extensible framework for data access and integration. • Expose heterogeneous data resources to a grid through web services. • Interact with data resources: • Queries and updates. • Data transformation / compression • Data delivery. • Customise for project using • Additional Activities • Client Toolkit APIs • Data Resource handlers • Base for higher-level services • federation, mining, visualization
SQL/MM Support in OGSA-DAIService SQL/MM Based Spatial Data Access and Integration
Object Query Tree for Spatial Data SELECT C.NAME, AREA(C.LOCATION) FROM C IN CITY, P IN PROVINCE WHERE P. PROVID=’130’ AND C.PROVID= P.PROVID Data Query Process in Distribution Query Process
Distributed Query for Spatial Data • Demonstration
LGrid Prototype • Build on NetBeans Platform NetBeans Platform is a generic framework for Swing applications. NetBeans Platform provides a reliable and flexible application architecture.
China National Grid and China Educational Grid • Grid Node Distribution Map http://www.cngrid.org/ • http://www.chinagrid.edu.cn/
OSGeo in China • Michael P. Gerlek deliver a speech for Chinese students
OSGeo in China • Professor Michael F. Goodchild at Institute of Geography
OSGeo in China • OSGeo Monthly Lecture at Institute of Geography, CAS
OSGeo in China • OSGeo Booth at Institute of Geography, CAS
More Information… Contact Gao AngChina State Key Laboratory of Resources and Environmental Information Systemgaoang@lreis.ac.cn Correlative Links: http://www.osgeo.org.cn http://www.lreis.ac.cn/ http://www.gaoang.com/ Thank You !