1. Services Chaining Alessandro Marin SSE Workshop 2008
ESA - ESRIN, Frascati, Rome

2. SSE Service Chaining Agenda Status of work
Aim of service integration and chaining on the SSE
Show two (four with Subscription version) examples of operative chained ESA services
MERIS RR (Data Access Service)‏
MGVI vegetation product (Thematic Service)
Conclusion‏s

3. Status of work Scope Scenario Many different web services
Multiple User interfaces
Hard to manage
Scope
Provide a user a single standard interface
Have Standard Services Interface (good also for SP)
Verify and Improve the SSE capability for Service integration

4. MERIS RR Service Components
MERIS RR Cloud-free Service
Definition Steps
To Query/Define the MERIS RR Catalogue with a cloud cover information (KEO)
To Provide MERIS RR Data to Cat-1 Users (GPOD)
Define an interface between KAOS and G-POD (TOOLBOX)
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5. Knowledge-centred Earth Observation
KEO Description
KEO
Knowledge-centred Earth Observation
Developed by ACS
Data Mining Information System
Based on primitive feature extraction
Automatic label application for cloud detection

6. Download of EO Products
G-POD Catalogue
Download of EO Products
Developed by TERRA2
Maintained in ESA
Shared resources
Many available computing elements
Near-real-time access
Download from the storage elements

7. User Point of View Service Goals:
Provide MERIS RR Data to users (Subscription Version/Catalogue)
Provide single user interface
Demonstrate the capability of SSE to interface with multiple web services
Chaining Possibility
Orchestration/ Choreography
System Improvements:
Not using the highest systems capabilities
Toolbox as SOAP Client
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8. G-POD MERIS MGVI Regional
The MGVI (MERIS Global Vegetation Index) is a measure of the amount and vigour of vegetation at the surface.
Algorithm is developed by JRC (Joint Research Centre)‏
Collect for a selected TOI and an AOI all the MERIS RR tiles.
This algorithm needs the G-POD
Data are already used in a chain for an ESA Fire Detection Service over Senegal

9. MGVI Over Europe Service Description

10. User Point of view

11. Conclusions
Support User with providing Required Data (Subscription and Catalogue)
MERIS RR (Level 1 Data)
MGVI (FAPAR -Fraction of Absorbed Photosynthetically Active Radiation- )
Define services according to standards
EOLI interface
OGC Standards
SOAP
Service Integrations makes services stable
Deploy Services Based on the system evolution
WebMapViewer
Service Registration Wizard

12. Thank you!