High level presentation for the workshop on workflow and earth observation at OSGIS 2010 at the University of Nottingham

1. Workshop on Workflows on Earth Observation Steven Ramage, OGC [email_address] 21 June 2010, Sir Clive Granger Building, University of Nottingham

7. “ Chaining” Web Services for decision support … WCS WPS – Classification WPS - WCTS WFS Internet Web servers OGC Interfaces Service chaining creates value-added products Decision Support Client Geoprocessing worklow developed in OGC testbeds since 2004 Assess Wildfire Activity

8. BPEL workflow in OWS-5 Participants chained combinations of services together to address the requirements of geospatial data conflation and image processing. It also addressed an important gap, which was the lack of SOAP (Simple Object Access Protocol) and WSDL (Web Service Description Language) descriptions for those APIs.

9. BPEL workflow in OWS-5 Both W3C standards are critical for creating and managing workflows using industry standards such as OASIS’s BPEL (Business Process Execution Language). BPEL is the workflow description language used in many end-user service chaining tools such as Oracle BPEL Designer and George Mason University’s BPEL Power.

10. Conflation workflow architecture

11. Conflation workflow architecture The OWS-5 geo-processing workflow thread bound together WFS and WPS services in BPEL scripts to model data conflation in a consistent, repeatable fashion. This successful prototype signaled the utility of this approach for a host of geospatial tasks that require the combination of many different geospatial services and operations. Fusion activities developed in OWS-7 and will have more focus in this area for OWS-8.

12. OGC Web Processing Service (WPS) WPS GetCapabilities Execute DescribeProcess Algorithms Repository … … Algorithm 1 Data Handler Repository … … Data Handler A Communication over the web using HTTP WPS-client Web Processing Service

13. REST-oriented workflow in OWS-5 The SOAP/WSDL/BPEL approach to chaining Web services is one of the most widely used ways to implement service oriented architectures (SOA). However, other approaches, notably REST (Representational State Transfer) services, are also used to implement services in an enterprise. Some feel that Web services do not need the extra layer of description provided by SOAP and WSDL to build reliable workflows.

14. REST-oriented workflow in OWS-5 REST uses HTTP and other parts of the basic Web platform. In the SWE (Sensor Web Enablement) thread of OWS-5, participants used a REST-based architecture and WfXML to create workflows that allowed raw earth observation data to be acquired from assets, such as the EO-1 satellite, and then utilized by different WPS. Relevant data were then published and distributed to end-users in formats such as GeoAtom (Atom with GeoRSS extensions) and KML.

22. Debris Flow Monitoring System

24. Debris flow - scenario

26. Debris flow monitoring system

27. Debris flow monitoring system

28. Debris flow monitoring system

29. Debris flow monitoring system

30. Debris flow operational scenario

31. Grid-enabled WPS from IfGI

32. Encapsulation vs. integration Integration requires a WSRF binding for WPS

33. Encapsulation vs. Integration

34. GEOSS AIP-2 flood prediction and response Led by NASA, Spot Image, Northrop Grumman, ERDAS From portal select desired theme and area of interest Wizard picks appropriate workflow for desired result Wizard Mozambique Disaster Management Information System (DMIS) Workflows Estimated rainfall accumulation and flood prediction model Flood Model Selected workflow automatically activates needed assets and models Baseline water level, flood waters and predicted flooding

35. GEOSS AIP-2 biodiversity & climate change Led by CNR, Univ of Colorado, GBIF IP3 Client & Workflow engine IP3 Distributed Community Catalog/Mediator WCS - T Other Non-OGC Services GBIF Non-OGC Services OGC WPS Access to Model CSW GEOSS Portal WCS WFS req req req resp resp resp req req resp resp req resp req resp req resp Broker Research Scientist req resp

36. SWE and geo-processing workflow SOS ! SAS Sensor Net Mission Control Center Access & Processing Node WPS CSW Register Measurement Types SPS CSW SAS SOS

37. The power of workflow Workflows can be formally described as programmes that invoke Web services that invoke other Web services that invoke other Web services. Analytical models, decision support tools and other complex resources can quickly deliver results in this way and optionally, provide documentation of the steps. There is an OGC Workflow Domain Working Group: this is a forum for describing, discussing and providing best practice guidance related to geospatial workflows using existing IT workflow standards.

38. Contact me

39. Thanks for your attention