Managing Interoperability for GEOSS - A Report from

the SIFS.J. Khalsa, D. Actur,S. Nativi, S. Browdy,P. Eglitis

Why GEOSS?

• Coordinate and integrate Earth observing, modeling and information systems to support informed decision making– voluntary contributions from GEO Members and Participating Organizations

• Interoperability is key to maximizing accessibility and utility of contributed resourcesGEOSS = Global Earth Observing System of Systems

GEO = Group on Earth ObservationsGEOSS = Global Earth Observing System of SystemsGEO = Group on Earth Observations

GEOSS Registries, Clearinghouses and Portals

(the GCI)

Contributors register components, associated services and standards

Registry structure is transparent - provides a source of information for client applications to

harvest.

Users discover

and exploit resources

contributed to GEOSS

SIF• Education and outreach for the GEOSS interoperability process

• Oversight of GEOSS Standards and Interoperability Registry (SIR)– Enhance understanding and utility of registered components and services

• A well-populated SIR essential for identifying opportunities to maximize interoperability– The SIR has an interoperable interface, via Z39.50– Difficult when components are in external catalogs

SIF = Standards and Interoperability ForumSIR = Standards and Interoperability

Registry

SIF = Standards and Interoperability ForumSIR = Standards and Interoperability

Registry

Real-World Challenges

• Achieving interoperability in a global environment where– Participation is voluntary– No formal mandates– Interoperability principles are very high-level

– No central funding source

• SIF also depends on volunteers

Current Activities - Core SIF

• Business process (task workflow system)– Building database of SIF contributors and experts

– Analysis of early SIR entries– Evaluate interoperability landscape of GEOSS

• outreach and engagement

• Help desk for registries– requests for facilitating interoperability

• Steering group for all SIF activities

Regional Teams

• Benefits of regional concept:– members work in the same time zone– specialized knowledge of local issues– easier identification of local experts– more possibilities to meet face-to-face

– consultation on issues from other regions

• Regional Team Guidance Document drafted

Regional Team Composition

• Europe - initial activity through GIGAS (integrates INSPIRE, GMES and GEOSS)

• Japan - early emphasis on GeoGRID and Global DEM

• North America - through USGEO and Canadian GEO

• China - coordinated by Chinese Meteorological Organization

• South America - coordinated by Argentinean Space Agency

• Africa - coordinated by South African Earth Observation Forum

• Australia/New Zealand - coordinated by CSIRO

• India and Korea pending

Other SIF Activities

• Component services relationship definition• The creation of GEOSS profile for BIIF• Improved SIR design• Standards taxonomy and GEOSS ontologies• Achieving optimum interoperability

– ensure all components, services and standards are registered

– convergence on an optimum set of interoperability arrangements

– focus on inter-domain aspects and resolve issues• e.g. through mediation services and mapping of ontologies

Achieving interoperability in a global environment:

Use Case #1

Contributor registering a service

Service and Service and Components Components RegistryRegistry

?

Contributor associating/registering a Standard or

Special Arrangement

Service and Service and Interoperability Interoperability

RegistryRegistry

SIF

Best Practice Wiki

Achieving interoperability in a global environment:

Use Case #2

End-user trying to discover and use a component and its services

Service and Service and Components Components RegistryRegistry

?

End-user trying to discover and use a Standard orSpecial Arrangement

Service and Service and Interoperability Interoperability

RegistryRegistry

SIF

Review of SIR Submissions

• Three key aspects of review:– All required information is present and well-formed– There is adherence to the GEOSS interoperability

principles*– Identification of complementary tasks with respect to

the overall GEOSS mission• Work with the contributor until the item is accepted

– As either a Special Arrangement (that may later be promoted) or Standard, or mobilized as a Best Practice

• General view:– Strive for a complete and accurate dictionary of systems

and their interoperability arrangements– Extend the knowledge and experience gained to new

systems in GEOSS and solving problems raised– Arrive at recommendations for the benefit of GEOSS

*From 10-Year Implementation Plan Reference Document, February 2005

New features in SIR v.2

• Interoperability with Components and Services Registry

• More information acquired for each submission

• Interoperability with SIF workflow system• More search capabilities• Modification history for each record• Tracking of status changes (includes notification to CSR):– Promotion from special arrangement to standard– Retirement and supersedence– Withdrawal and deletion

Best Practices Wiki

• Open forum for converging on best practice recommendations and reviews

• Reaches out to a broad community• Multi-disciplinary editorial team to help contributors

• Hot links and cross-references with Components, Services and Standards registries are planned– http://wiki.ieee-earth.org/

Related Fora

• SCC 40: IEEE Standards Association Coordinating Committee for Earth Observation.– Where gaps in earth observation standards are identified

the SCC 40 can sponsor new standards development– http://grouper.ieee.org/groups/earthobservationsSCC/

• IEEE Committee on Earth Observation Standards Working Group– Group of international volunteers focusing on technology

and standards to facilitate interoperability in GEOSS– Supports the GEO Standards and Interoperability Registry– https://www.ieeecommunities.org/iswg

• Best Practices Wiki Editorial Team– http://wiki.ieee-earth.org/

Contact the SIF

http://seabass.ieee.org/groups/geoss/

SIF co-chairs:

Siri-Jodha Singh Khalsasjsk@nsidc.org

David Arcturdarctur@opengeospatial.org

Questions?