Global Change Master Directory (GCMD). 2020. GCMD Keywords, Version 9.1. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA).
Abstract
Global Change Master Directory (GCMD) Keywords are a hierarchical set of controlled Earth Science vocabularies that help ensure Earth science data, services, and variables are described in a consistent and comprehensive manner and allow for the precise searching of metadata and subsequent retrieval of data, services, and variables. Initiated over twenty years ago, GCMD Keywords are periodically analyzed for relevancy and will continue to be refined and expanded in response to user needs. The categories of GCMD Keywords are as follows: Earth Science,
Earth Science Services,
Data Centers/Service Providers,
Projects,
Instruments/Sensors,
Platforms/Sources,
Locations,
Horizontal Data Resolution,
Vertical Data Resolution,
Temporal Data Resolution,
URL Content Types,
Granule Data Formats,
Measurement Names, and Chronostratigraphic Units.
The information provided on this page defines how GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.