The GCMD Keywords are a hierarchical set of controlled Earth Science vocabularies that help ensure Earth science data and services are described in a consistent and comprehensive manner and allow for the precise searching of collection-level metadata and subsequent retrieval of data and services. Initiated over twenty years ago, the GCMD Keywords continue to be refined and expanded in response to user needs. The sets of GCMD Keywords are as follows.
- Earth Science Keywords 7. Horizontal Data Resolution
- Earth Science Services Keywords 8. Vertical Data Resolution
- Data Centers 9. Temporal Data Resolution
- Projects 10. URL Content Types
- Platform/Instrument/Sensors 11. Chronostratigraphic Units
- Locations
All requests for keyword additions, modifications, or other keyword related issues/questions should be sent to support@earthdata.nasa.gov
To submit a keyword, the submitter should:
Review the controlled keyword rules
Verify that the keyword does NOT already exist
Include a definition of the proposed keyword
The keywords can be accessed via:
GCMD Keyword Directory: http://gcmd.nasa.gov/learn/keyword_list.html
Dynamic RESTful Service http://gcmdservices.gsfc.nasa.gov/kms/capabilities?format=html
The keywords should be cited as:
Global Change Master Directory (GCMD). 2015. GCMD Keywords, Version 8.1. Greenbelt, MD: Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA). URL:http://gcmd.nasa.gov/learn/keywords.html