Publication Date: 2020-10-26
Approval Date: 2020-09-23
Submission Date: 2020-08-10
Reference number of this document: OGC 20-073
Reference URL for this document: http://www.opengis.net/doc/PER/EOAppsPilot-summary
Category: OGC Public Engineering Report
Editor: Ingo Simonis
Title: OGC Earth Observation Applications Pilot: Summary Engineering Report
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- 1. Subject
- 2. Executive Summary
- 3. Introduction
- 4. Participants
- 5. Results
- 5.1. Open Standards
- 5.2. Application Patterns
- 5.3. Application Package and CWL
- 5.4. ADES and EMS Deployment
- 5.5. High-level Architecture
- 5.6. Data Discovery
- 5.7. SpatioTemporal Asset Catalog (STAC)
- 5.8. Container Format
- 5.9. Quotation and Billing
- 5.10. Workflows
- 5.11. Graphical User Interfaces
- 5.12. Kubernetes Cluster Support
- 6. Future Work
- Appendix A: References
- Appendix B: Terms and definitions
- Appendix C: Revision History
This Engineering Report (ER) summarizes the main achievements of the OGC Innovation Program initiative Earth Observation Applications Pilot, conducted between December 2019 and July 2020.
This Engineering Report (ER) summarizes the main achievements of the OGC Innovation Program initiative OGC Earth Observation Applications Pilot, conducted between December 2019 and July 2020. The pilot explored an Earth Observation Application software architecture that was developed in OGC Testbeds 13-15. The architecture allows the deployment and execution of externally developed applications on Earth Observation (EO) data and processing platforms. The architecture is essentially based on three major components:
Execution Management Service (EMS): This component provides a RESTful interface (defined using OpenAPI) to register applications and build workflows from registered applications. The EMS selects the appropriate ADES platform to execute the processes based on the runtime input parameters (close to the data).
Application Deployment and Execution Service (ADES): This component allows deployment, discovery, and execution of applications or processing of quoting requests.
Applications are delivered in the form of Docker images along with corresponding metadata called an Application Package (AP). The application package provides all information for deployment and execution of an application.
The pilot demonstrated that the interoperability arrangements developed and documented in OGC Innovation Program initiatives Testbed 13, 14 and 15 provide a solid starting point for maturity tests within operational platforms. Additional arrangements and more detailed definitions have been developed during the pilot that now allow deployment and execution of an application on various platforms with minimal adaptions.
The pilot produced very valuable results. It confirmed the general approach to use Docker for application packaging and HTTP Web APIs or Web Services for application handling and execution. It defined application patterns based on data inputs/outputs, confirmed the role of the Common Workflow Language (CWL) for application description, execution, and workflow building; and recommends the usage of the SpatioTemporal Asset Catalog (STAC) as a data manifest for application inputs and outputs.
The Earth Observations Applications Pilot explored and evaluated the maturity of the Earth Observation Applications architecture. The architecture has been developed in various OGC Innovation Program initiatives over the last three years. This pilot now explored everything in operational environments.
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This Engineering Report (ER) summarizes the main achievements of the OGC Innovation Program initiative Earth Observation Applications Pilot, conducted between December 2019 and July 2020. The Call for Participation was published in December 2019. The actual execution phase lasted from January to July 2020.