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titleWhat Are the GCMD Keywords?

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Keywords
Keywords

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The GCMD keywords Global Change Master Directory (GCMD) Keywords are a hierarchical set of controlled Earth Science vocabularies that help ensure Earth science data, services, and services variables are described in a consistent and comprehensive manner and allow for the precise searching of collection-level metadata and subsequent retrieval of data, services, and servicesvariables. Established Initiated over twenty years ago, these controlled GCMD keywords GCMD Keywords are periodically analyzed for relevancy and will continue to be refined and expanded in response to user needs. There are twelve sets The categories of GCMD keywordsKeywords are as follows.

  • Earth Science
Keywords
  • Earth Science Services
Keywords
  • Data Centers/Service Providers
  • Projects
Instrument
  • Instruments/Sensors
  • Platforms/Sources
  • Locations
  • Horizontal Data Resolution
  • Vertical Data Resolution
  • Temporal Data Resolution
  • URL Content Types
  • Granule Data Formats
  • Measurement Names
  • Chronostratigraphic Units
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titleHow Do I Submit a Keyword Request or Issue?

 

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Requests
Requests

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All requests for keyword additions, modifications, or other keyword related issues/questions should be sent to support@earthdata.nasa.gov 

To submit a keyword , request (addition or modification) the submitter should:

  1. State the proposed keyword
  2. Provide a definition of the keyword
Review the controlled keyword rules
  1. State the rationale for the keyword addition or modification
  2. Review the keyword requirements (criteria used when determining what constitutes a well-curated keyword list)

  3. Verify that the keyword does

NOT already exist
  • Include a definition of the proposed keyword

    1. not already exists by checking the keywords in the Keyword Directory and search for the keyword

    Once the above steps have been completed, submit the request to support@earthdata.nasa.gov. or post to the forum. The submitter will be notified of their submission status and when the keyword change has been made.

    Other keyword issues/questions should be posted to the keyword forum.

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    titleHow Long Will It Take for My Keyword To Be Reviewed?

     

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    Fast-Track Keywords:

    • An expedited review process (less than five business days) for proposed additions and changes that are small and have little or no impact on other users and metadata providers.

    Full-Review Keywords

    • The full review process for proposed GCMD keyword changes is a review process facilitated by the ESDIS Standards Coordination Office (ESO) with input from subject matter experts drawn from the user and provider communities. These reviews take longer (1-2 keyword releases a year) to complete and are used for GCMD keyword changes or changes that have a large impact on existing records and users.

    The keyword submitter will be notified whether their keyword is considered a fast-track or full review.

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    titleHow Do I Access the GCMD Keywords?
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    Access
    Access

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    The keywords can be accessed GCMD Keywords are accessible via:

     

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    titleHow Do I Cite the GCMD Keywords?
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    The keywords GCMD Keywords should be cited as:

    Global Change Master Directory (GCMD). 20152024. GCMD Keywords, Version 818.1 . Greenbelt, MD: Global Change Data Center, Science and Exploration DirectorateEarth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA). URL :http(GCMD Keyword Forum Page): https://gcmdforum.earthdata.nasa.gov/learn/keywords.htmlapp.php/tag/GCMD+Keywords

     
      
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