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OGSA-DAI case-study SEE-GEO OGSA-DAI Training Edinburgh

OGSA-DAI case-study SEE-GEO OGSA-DAI Training Edinburgh. SEE-GEO. SEcurE access to GEOspatial services EDINA, NeSC, NCeSS, MIMAS http://edina.ac.uk/projects/seesaw/seegeo/index.html Access to geospatial information on a grid Open Geospatial Consortium (OGC) web services.

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OGSA-DAI case-study SEE-GEO OGSA-DAI Training Edinburgh

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  1. OGSA-DAI case-study SEE-GEOOGSA-DAI TrainingEdinburgh

  2. SEE-GEO • SEcurE access to GEOspatial services • EDINA, NeSC, NCeSS, MIMAS • http://edina.ac.uk/projects/seesaw/seegeo/index.html • Access to geospatial information on a grid • Open Geospatial Consortium (OGC) web services

  3. OGC Geolinking Interoperability Experiment • OGSA-DAI being extended to offer integrated, distributed resource management for geo-spatial tools • Using established open interoperability standards • Web Feature Service (WFS) and Web Map Service (WMS) now integrated into OGSA-DAI • The IE is hardening candidate OGC specifications • Geolinked Data Access Service (GDAS) • GeoLinking Service (GLS) • Validate • Web Coverage Service (WCS) scheduled • Extend to support secure access

  4. e-Social Science demonstrator • Two data resources • Census statistics • Attributes about a region • e.g. the cost of a loaf of bread • Geo-data access service (GDAS) • Borders data • Unique regions encoded as polygons • Web feature service (WFS) • How to link the attributes to the regions? • A geo-linking service • Execute a join across the two data sets • Implemented as a Web Processing Service (WPS)

  5. Access domain-specific data sets Efficient delivery methods Utilise existing services Concentrate on algorithm Demographic forecasting GLS Portal Send parameterised query Retrieve annotated image Receive ticket for results Census DB OGSA-DAI GDAS Cache attributes Run algorithm Request attributes getData Map Server geoLink Feature Portrayal Store image on server Borders DB getFeature Stream relevant annotated polygons Stream polygons WFS Request features Call out to existing FP service FPS

  6. What did OGSA-DAI give SEE-GEO? • Could implement GLS service without OGSA-DAI • But using OGSA-DAI allowed leverage of • Workflow engine • Out-of-the-box activities for • Queries • Delivery • Security • Integration with other grid technologies e.g. GridFTP

  7. What did OGSA-DAI give SEE-GEO? • A toolkit to • Develop domain-specific activities • Develop support for domain-specific data resources • Ability to execute workflows using these • Build OGC Web Processing Services (WPS) • Relatively little effort to • Choose different data resources dynamically • Merge GDAS XML into a relational data resource • Transfer data using GridFTP • Protect data using GSI • Experiment!

  8. What next for SEE-GEO? • Deployment • Component integration • Bug fixing • Testing • Performance testing of OGSA-DAI as a GLS • Complete participation in the OGC Interoperability Experiment • Add Web Coverage Service (WCS) • Look at security and OGC • Shibboleth • Grid Security Infrastructure (GSI) • PrivilEge and Role Management Infrastructure Standards Validation (PERMIS) • OGSA-DAI:Z39.509 SRW/U bridge • Ordnance Survey Master Map delivery using a grid

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