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Progress on Metadata Issues for Ocean Observing

Progress on Metadata Issues for Ocean Observing. Stephanie Watson, CeNCOOS Julie Bosch, NOAA NCDDC Presented at the QARTOD II Workshop, 2/28-3/2/05. Overview. Metadata in IOOS Data Management and Communications (DMAC) plan and subsequent issue paper

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Progress on Metadata Issues for Ocean Observing

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  1. Progress on Metadata Issues for Ocean Observing Stephanie Watson, CeNCOOS Julie Bosch, NOAA NCDDCPresented at the QARTOD II Workshop, 2/28-3/2/05

  2. Overview • Metadata in IOOS Data Management and Communications (DMAC) plan and subsequent issue paper • COTS/ONR Metadata Working Group for IOOS Interoperability II • Marine Metadata Interoperability (MMI) Initiative • Example resources for wave and current metadata • Contributions from this workshop

  3. IOOS DMAC Plan • Metadata • Data discovery • Data transport • On-line browse • Data archive DMAC plan, 2003

  4. Metadata Needs in DMAC Plan • Determine IOOS metadata content and format standards • Develop tools and procedures to support metadata providers • Select (or develop) and maintain catalog and search capability • Develop discovery interface for archive system • Design discovery portal • Study alternative discovery approaches • Design and implement data location service • Initial recommendations: FGDC and catalog

  5. Example additional metadata issues • Design FGDC v. 3/ISO 19139-compliant profile(s) (machine readable) • Translators for all FGDC v.2 records (incl. Profiles and Extensions) into machine-readable ISO 19139 • Platform or sensor-related info. in metadata • Use cases in guidance • Catalog synchronization • Consider use of OGC specifications (e.g., Web Catalog Service) • Consider use of UDDI, SOAP, WSDL, ISO 11179 metadata registries • Formalize vocabularies/thesauri/ontologies in XML/RDF/OWL and submit to online library • Other recommendations (e.g., metadata in XML)

  6. Addressing these metadata issues will happen in 3 stages I. Inventory what’s already available (time scale: sub-year) II. Identify best practices from among the inventory items (time scale: sub- year) III. Develop community-based standards (time scale: years)

  7. COTS/ONR Metadata Working Group • Participants: Anne Ball (lead), Julie Bosch, Stephanie Watson, Rob Bochonek, Dwayne Porter, Steve Collins • Task: Develop a work plan to develop metadata to enable the IOOS Interoperability Demo II • Demo I: www.openioos.org (winds, SST) • Demo II will add waves, surface currents, chlorophyll in regional natural hazards framework

  8. Definitions • Data Dictionaryincludes the metadata elements (terms) necessary to describe the data sets: • name, abbreviation (label), definition, units, scope the domain and/or range of values, data type (actual measurement, derived, model result), source, for example • Thesaurus - hierarchical and synonym information for each term entry, as well as the identificationof the source ofthe related terms --allows mapping between different data dictionaries

  9. COTS/ONR Metadata WG Milestones • I. (6 months)Version 1 of an IOOS/COTS Data Dictionary with contents describing the metadata elements required for the automatic discovery, access and use of SST, wind, waves, surface current and chlorophyll data. • II. (12 months)Metadata Guidance for IOOS/COTS Data Providers - to include Use Cases which incorporate data dictionary content and thesaurus information into the metadata standard(s) used by the Interoperability II demonstration

  10. Tasks • Jan 15 Identify Staff • Feb 1 Identify web workspace • Feb 15 Establish 5 sub-groups (1 per variable) • Feb 15 Identify metadata elements required, drawing from existing efforts • Mar 1 Establish structure of metadata elements • Apr 1 Draft data dictionary and thesaurus • May 1 Final data dictionary and thesaurus • June 30 Milestone I complete • Aug 1 “How to” guidance • Sept 1 Publish guidance to web • Oct 1 Develop examples (“use cases”) – involving a variety of forms e.g., NetCDF headers, FGDC, SensorML • Dec 1 Metadata available for Interoperability II demo • Dec 30 Publish guidance on how to add new parameters to demo • Dec 31 Milestone II complete

  11. Some Additional Considerations • Continuously coordinate with the other COTS/ONR working groups • Build on work already accomplished or in development • Additional tools may need to be developed (e.g., automated access to data dictionaries/thesauri) • Develop in compliance with FGDC/ISO 19115/19139 (latter is the draft specification used by the OGC web services) • Make metadata available via a catalog service (data discovery)

  12. Marine Metadata Interoperability (MMI) Initiative • Funded by NSF, with additional support from SURA/SCOOP • Lead PI: John Graybeal (MBARI). Other partners: Scripps, LDEO, OSU, WHOI, SURA/SCOOP, UHawaii, NOAA, UKansas, NASA, BODC (international) • Contact information: • Luis Bermudez, MMI Liaison bermudez@mbari.org • www.marinemetadata.org

  13. MMI Mission and Objectives • Mission:To promote the exchange, integration and use of marine data through enhanced data publishing, discovery, documentation and accessibility. • Objectives: • Provide guidance and reference documentation on properly using and developing metadata solutions for the ocean science community; • encourage community involvement in the development and evaluation of the documentation; and • use two test-bed activities to demonstrate the functions of metadata in cross-platform, cross-disciplinary, interoperable distributed data systems

  14. Organization of the MMI Website Http://marinemetadata.org

  15. San Francisco Bay image showing currents and waves

  16. Metadata terms/data dictionary currents – some sources id’d via MMI • “CODAR in FGDC” - developed by domain experts at Marine Metadata Workshop, 10/03http://cuahsi.sdsc.edu/html/metadataresources.html • ADCP examples started at the metadata workshop (excel spreadsheet) and some suggested metadata elements athttp://mmug.calfish.org/adcp.htm • SEACOOS Data Dictionaryhttp://nautilus.baruch.sc.edu/seacoos_dd/php/dd_login.php • Others from MMI website:http://marinemetadata.org/vocabularies/refs

  17. CF, BODC metadata elements: currents • CF metadata elements • eastward_sea_water_velocity • northward_sea_water_velocity • upward_sea_water_velocity • direction_of_sea_water_velocity • sea_water_speed BODC metadata elements - Horizontal velocity of the water column - Vertical velocity of the water column - Raw current meter output parametershttp://marinemetadata.org/vocabularies/examples/ioos/

  18. CORTEZ BANK http://www.isracam.co.il/swell.htm

  19. Metadata terms/data dictionarywaves – some sources • NDBC/CDIP/NCDDC working group for spectral wave metadata • SEACOOS Data Dictionaryhttp://nautilus.baruch.sc.edu/seacoos_dd/php/dd_login.php • Others from MMI website:http://marinemetadata.org/vocabularies/refs

  20. NDBC/CDIP working group for spectral wave metadata • Example: • 1. Entity: sea state • 1.1 Attribute: Significant wave height • 1.1.1. Units: Length: meter • 1.1.2. Method of Determination: Estimation Zeroth Spectral Moment • 1.1.3. Source: spectral density • 1.1.4. Availability of Source: available • 1.2 Attribute: Spectral peak period • 1.2.1. AKA: Dominant Period • 1.2.2. Unites: Time: Second • 1.2.3 Method of Determination: Maximum spectral density • 1.2.4. Source: spectral density • 1.2.5. Availability of Source: available…

  21. CF, BODC metadata elements for IOOS variable: waves • CF metadata elements • significant_height_of_wind_waves • direction_of_wind_wave_velocity • swell_wave_period • direction_of_swell_wave_velocity • wind_wave_period • significant_height_of_swell_waves • BODC Surface_waves • Wave height and period statistics • Wave direction • 'Other' wave statistics • Spectral wave data parameters http://marinemetadata.org/vocabularies/examples/ioos/

  22. Contributions from this workshop – identify: • Terminology required to discover and use the wave and current data • Definitions for each term • Labels for each term • Domains (acceptable values) • Ranges • Units • Quality control flags

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