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Global Earth Observing System-of-Systems (GEOSS)Architectural Framework
Doug Nebert
FGDC, U.S. Geological Survey
ddnebert@usgs.gov
February 2008
Intergovernmental Group on Earth Observations (GEO)
• 72 Member countries plus the European Commission • 52 Participating Organizations • GEO Secretariat (Geneva)• Committees:
– Architecture and Data– Capacity Building– Science and Technology– User Interface
What is GEOSS?Global Earth Observing System of Systems
• GEOSS is a distributed system of systems built on current international cooperation among existing Earth observing and data management systems – in situ and remote sensors and systems
• GEOSS enables the collection and distribution of accurate, reliable Earth Observation data, information, products, and services in an end-to-end process
• GEOSS recognizes and promotes the deployment of geospatial standards to enable broad access and interoperability among diverse systems – engages the space and environment community to adopt and expand Spatial Data Infrastructures
GEOSS infrastructure elements
• Components– Systems, projects, programs, initiatives
• Services– Web services, brokered services, linked with information
content for delivery
• Registries– “Yellow-pages” directories of common GEOSS resources
• Clearinghouse– Cross-GEOSS search capability for services and data
• Web Portals– User interface to access all GEO resources, search GEOSS
Registries and Clearinghouse
GEOSS Registries as common infrastructure
• GEOSS Components Registry– Systems, initiatives, programs and their operators
• GEOSS Services Registry– Web service interfaces and websites with links to all
relevant associated standards or practices• GEOSS Standards and Interoperability Registry
– Service interface standards, data formats, schemas, and other standards
– Non-standard community practices can be registered as “special arrangements”
• Best Practices Registry/Wiki – under development• Earth Observation (User) Requirements Registry – under
development
GEOSS registry system objectives
• To register components and have them approved by the GEO Secretariat,
• To register services and associate them with GEOSS-recognized standards – and special arrangements for implementations using non-recognized approaches,
• To register special arrangements and GEOSS-recognized standards. – Taxonomy of standards types is used to assist in the
discovery and classification of GEOSS service implementations.
• Best practices (wiki) and EO User Requirements• On-line access
– http://geossregistries.info/– http://seabass.ieee.org/groups/geoss/
GEOSS workflow
GEOSSComponent,
Service registry
Standards,Special
ArrangementsRegistries
references
Web Portal
searches
Offerors
contribute
CommunityResourcesaccesses
GEOSSClearinghouse
Catalogues
User
accesses
get catalogueservices
accesses
searches
invokes
1
2
34
56
7
8
ComponentSystem
Service(s)
GEOSS RegistriesThe Registries store organizational, system, and service information in the context of existing standards and practices within the GEO community.
Registering items
• GEO members and participating organizations are invited to register their offers for GEOSS participants to find
• Components and Service Registry created and hosted at George Mason University– Registered services include data access services,
WMS, metadata catalogs, order, data transformation, etc.
– Services should be standards-based but may alternately reference community practices or ad hoc standards, known as “special arrangements”
• Standards registry hosted by IEEE to provide official list of registered standards and special arrangements
Registration Process
EnterIndividual
Info
GEOAffiliation
EnterComponent
Info
Link to SBAs
EnterService
Info
Link to Standards
http://geossregistries.info
Done
Data format, metadata,Protocol, schema, Service specification
GEOSS Clearinghouse
• Clearinghouse is a broker to Community Catalogues• Searches GEOSS Service Registry to identify
services that can be searched• Community Catalogues may either be “harvested” in
advance or “searched” at the time of a user query • Searches received from GEO Web Portal,
Community Portals or any other external application acting as a catalog client
• Brief or full responses are marshaled and returned to requesting client as XML
Web Portal, Client, DS Client, Desktop application
2
1
4
5 3
Registercatalogs asservices
GEOSS Clearinghouse
OGC CSW 2.0.2
6 Collate response
7
GEO Web Site
Client Tier
Business Process Tier
Access Tier
GEOSSWeb
Portal
GEOSSRegistries
Services
Components
Standards
DirectBroadcast
OtherServices
DataAccess
Services
ModelAccess
Services
CommunityPortals
Decision-Support Applications
RequirementsCommunityCatalogues
PortrayalServices
WorkflowManagement
ProcessingServices
OtherServices
GEOSSClearinghouse
CSW/ISO23950
CSW/ISO23950
Get list
Register
CSW/SRU/UDDI
SensorAccess
Services
GEOSS Architecture – Engineering Viewpoint
Initial Operating Capability
• An Initial Operating Capability (IOC) was established for GEOSS in November 2007 largely as a result of a GEOSS Architecture Implementation Pilot, Phase 1. Several demonstrations portray the IOC functionality. – Users can access the GEOSS IOC functionality
through the GEOSS Web Portal Candidates, Community Portals and Decision Support Clients.
– Providers can register their services as part of the IOC at the GEOSS registry system.
– Developers can view a description of the GEOSS IOC architecture through the website: http://www.ogcnetwork.net/GEOSS_IOC
GEOSSComponent Registry
Service Registry
GEOSSStandards and
Special ArrangementsRegistry
references
GEO Portallinks
GEOSSClearinghouse
CataloguesServices
User
accesses
accesses
Accesses allRegistered Community Resources
searches
GEOSS Common Infrastructure
GEONETCast
Websites/Webportals
Catalogues
Registered components External resources
Websites/Webportals
GEO Web Sitelinks
Links to Other Community Resources
Register
Documents
RSS
CatalogQueryClients
GEOSS Common Infrastructure
For more information, contact:
Douglas Nebert
U.S. Federal Geographic Data Committee
ddnebert@usgs.gov
+1 703 648 4151
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