Progress on Metadata Issues for Ocean Observing Stephanie

Progress on Metadata Issues for Ocean Observing Stephanie Watson, Ce. NCOOS 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 • 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

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

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

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)

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

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

Definitions • Data Dictionary includes 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 identification of the source of the related terms --allows mapping between different data dictionaries

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

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

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)

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

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, crossdisciplinary, interoperable distributed data systems

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

San Francisco Bay image showing currents and waves

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

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 parameters http: //marinemetadata. org/vocabularies/examples/ioos/

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

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

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…

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/

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