1. OGC Web Processing Service 2.0 SWG Insights from last TC OGC
Yves Coene, Spacebel s.a.
Arnaud Cauchy, EADS Astrium
Frascati – 23rd January 2013
Session 4: State of the art technology and standards, 12/10/2012

2. Insights from last TC OGC - Agenda
Asynchronous execution model in OGC WPS2.0 - draft
WPS-T(ransactional) – automatic deployment
Session 4: State of the art technology and standards, 12/10/2012

3. Asynchronous Model Asynchronous Execution in WPS2.0
Session 4: State of the art technology and standards, 12/10/2012

4. Copyright © 2012 Open Geospatial Consortium
Contexte & Rational
Contexte:
CR – methods for controlling, and checking the status of asynchronous process.
CR Addendum to CR
Rational
usage of statusLocation attribute to return Process Instance Identifier URN
Execute operation asynch or synch by nature
Distinction between Process Identifier and Process Instance Identifier.
Addendum : A proposal to complete CR09-109
Copyright © 2012 Open Geospatial Consortium

5. Copyright © 2012 Open Geospatial Consortium
First Proposal - CR09-109
WPS Client
WPS Server
GetCapabilities
GetCapabilities
Identifier, Union of supports{}
DescribeProcess
Identifier
DescribeProcess
Identifier, supports{}
Execute
Identifier
Execute
statusLocation = Process Instance Identifier URN
Abort
Pause/Resume
GetStatus
processIdentifier = Process Instance Identifier URN
Abort
Pause/Resume
GetStatus
statusLocation= Process Instance Identifier URN
Copyright © 2012 Open Geospatial Consortium

6. Copyright © 2012 Open Geospatial Consortium
Latest Version
WPS Client
WPS Server
GetCapabilities
GetCapabilities
Identifier, Union of supports{}
DescribeProcess
Identifier
DescribeProcess
Identifier, asynchSupported, [asynchSupports{}]
Execute
Identifier, [asynchMode]
Execute
ProcessInstanceIdentifier = Process Instance Identifier URN
statusLocation = ExecuteResponse document URL
Abort
Pause/Resume
GetStatus
ProcessInstanceIdentifier = Process Instance Identifier URN
Abort
Pause/Resume
GetStatus
ProcessInstanceIdentifier = Process Instance Identifier URN
statusLocation = ExecuteResponse document URL
Copyright © 2012 Open Geospatial Consortium

7. Example of the ResponseDocument
Example of Status element in ResponseDocument <wps:ExecuteResponse […] service="WPS" version="1.0.0" xml:lang="en-CA" serviceInstance= statusLocation=" […] <wps:Process wps:processVersion="1.0"> <ows:Identifier>RunTraj</ows:Identifier> <ows:Title>BADC Trajectory Service</ows:Title> </wps:Process> <wps:Status processInstanceIdentifier= “cb d63c2d1388e8dd810” creationTime=" T13:00:03.0Z" > <wps:ProcessTerminated terminationTime=" T14:00:03.0Z"/> </wps:Status> <wps:ProcessOutputs> […] </wps:ProcessOutputs> </wps:ExecuteResponse>
Copyright © 2012 Open Geospatial Consortium

8. Evolution of the asynchronous interface
CR09-109
Addendum Proposal
Execute
Query
No change
asynchMode (O – Boolean). Request an execution either in synch.or asynch mode.
Response
Reuse statusLocation to store ProcessInstanceIdentifier
ProcessInstanceIdentifier attribute
statusLocation unchanged
Abort/Pause/Resume/GetStatus
ProcessIdentifier <ows:Identifier> URN from statusLocation
Identifier attribute in processInstance element.
revised version of WPS Execute response <ows:Identifier> URN from statusLocation
processInstanceIdentifier new attribute in wps:Status element of the ResponseDocument
DescribeProcess
Support (M - List) – list of supported operation. If empty, asynchronous not supported
asynchSupported (M - Boolean)
asynchSupports (C – 1..n) list of supported operations
GetCapabilities
Union of supported asynch operation s
No change Information in ProcessBrief
Copyright © 2012 Open Geospatial Consortium

9. In summary Focus on asynchronous execution and instance control.
Update of the Core plus Asynchronous extension
Core
execModelSupported:
synchOnly
asynchOnly
synchAndAsynch
Optional
Default: synchOnly
Ext. Asynch
Control
Session 4: State of the art technology and standards, 12/10/2012

10. WPS-T(ransactional) Automatic Deployment of web processes
The ESA GSTP DREAM use case
WPS-T(ransactional)
Session 4: State of the art technology and standards, 12/10/2012

11. ESA GSTP DREAM Project
GSTP General Support Technology Program in the frame of Earth Observation Program
DREAM Decision Support and Real Time EO Data Management
Duration 24 months, 2 Phases KO: January Consortium of 14 actors
Objectives – extract
Define and prototype an end-to-end solution/system […] taking into account available infrastructure within EUSC and EMSA and the ESA PDGS […]
Integrate novel and state-of-the art technologies […] available for EO data identification and EO data provision […]
Copyright © 2013 Open Geospatial Consortium

12. Prototype for Ortho-imagery Quality
Features: On-demand service to
Assess the quality of an ortho-image, including Positional Accuracy
Improve the position accuracy of an ortho-image
In the context of multi-mission supports: multiple sensors
How the data quality is illustrated in the client
Shifts - vector layer
Quality Mask – raster coverage
Ortho-image to assess
Copyright © 2013 Open Geospatial Consortium

13. The issue Data to process are here Reference Data are here
Processes are here
Ortho
Raw Acquisition
ESA/EUSC Cloud
On-line Photogrammetry Web Services
Ortho-rectification
Ortho-image quality assessment
Ref3D
ASV GEO Infrastructure
Copyright © 2013 Open Geospatial Consortium

14. Typical Approach – WPS – WCS/WFS Chaining
According EO dataset size
Download time is in hour
(Pleiade scene up to 33 Gb)
Execute request
ProcessId=MyProcess
Input=Data URL
Ortho
Raw Acquisition
ESA/EUSC Cloud
WCS
WCS GetCoverage Gb
On-line Photogrammetry Web Services
Ortho-rectification
Ortho-image quality assessment
Ref3D
Too big and/or forbidden
to transfer
ASV GEO Infrastructure
Copyright © 2013 Open Geospatial Consortium

15. Tested solution in the prototype
Raw Acquisition
Ortho
Cloud Processing Proxy
On-line Photogrammetry Web Services
Ortho-rectification
Ortho-image quality assessment
Ref3D
ESA/EUSC Cloud
ASV GEO Infrastructure
Copyright © 2013 Open Geospatial Consortium

16. Architecture – Web Services
On-line Photogrammetry
Web Services
Compute AOI WPS Processing
Ref3D
Database
Reference
Orthoimages
DEM
Compute RPC WPS Processing
OGC WPS
Compute Quality
WPS Processing
OGC WMS
Raw Acquisition
Ortho
Cloud Processing Proxy
On-line Photogrammetry Web Services
Ortho-rectification
Ortho-image quality assessment
Ref3D
ESA/EUSC Cloud
ASV GEO Infrastructure
Copyright © 2013 Open Geospatial Consortium

17. Architecture – Processing Proxy
Cloud Processing Proxy
OGC WPS Client
OrthoRectify
WPS Process
AssessQuality
Raw Image
Handler
Ortho-Image
Producer
OGC WPS
Raw Acquisition
Ortho
Cloud Processing Proxy
On-line Photogrammetry Web Services
Ortho-rectification
Ortho-image quality assessment
Ref3D
ESA/EUSC Cloud
ASV GEO Infrastructure
Copyright © 2013 Open Geospatial Consortium

18. Collaborative Processing in motion
Cloud Processing Proxy
On-line Photogrammetry
Web Services
OGC WMS
OGC WPS
OGC WMS
OGC WPS
Compute AOI WPS Processing
Reference
Orthoimages
DEM
(Ref3D)
OrthoRectify
WPS Process
WPS Client
Raw Image
Handler
Compute RPC WPS Processing
Ortho-Image
Producer
AssessQuality
WPS Process
Compute Quality
WPS Processing
Mutliple Senors
Raw Acquisitions
Ortho-images
Copyright © 2013 Open Geospatial Consortium

19. Collaborative Processing in motion
Cloud Processing Proxy
On-line Photogrammetry
Web Services
OGC WMS
OGC WPS
OGC WMS
OGC WPS
Compute AOI WPS Processing
Reference
Orthoimages
DEM
(Ref3D)
OrthoRectify
WPS Process
WPS Client
Raw Image
Handler
Compute RPC WPS Processing
Ortho-Image
Producer
AssessQuality
WPS Process
Compute Quality
WPS Processing
Mutliple Senors
Raw Acquisitions
Ortho-images
Copyright © 2013 Open Geospatial Consortium

20. Use Case for WPS-T Execute request ProcessId=MyProcess
Input=MyData URL
ResponseDocument
Output = Result URL
Proxy
WPS
Add Process
Execute
WPS Server
Data Cloud
Del Process
Proxy
Process
Proxy
Process
Processing Cloud
Copyright © 2013 Open Geospatial Consortium

21. Use Case for WPS-T Result URL Result URL WPS WPS Server Proxy Process
Data Cloud
Proxy
Process
Proxy
Process
Processing Cloud
Copyright © 2013 Open Geospatial Consortium

22. Summary of WPS-T
WPS-T: deployment and undeployment Note: TransactionMonitor(action={add, update, del}, process)
ESA GSTP DREAM – Quality Assessment Service WPS based with mobile code as a use case for WPS-T
Session 4: State of the art technology and standards, 12/10/2012

23. Thank You
Q&A
Session 4: State of the art technology and standards, 12/10/2012