What Are the GCMD Keywords?
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. Established over twenty years ago, these controlled GCMD keywords continue to be refined and expanded in response to user needs. There are twelve sets of GCMD keywords
- Earth Science Keywords
- Earth Science Services Keywords
- Data Centers
- Projects
- Instrument/Sensors
- Platforms/Sources
- Locations
- Horizontal Data Resolution
- Vertical Data Resolution
- Temporal Data Resolution
- URL Content Types
- Chronostratigraphic Units
How Do I Submit a Keyword Request or Issue?
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
How Do I Access the Keywords?
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
How Do I Cite the Keywords?
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
