How to cite the International Directory Network (IDN)

Welcome to the CEOS International Directory Network (IDN) -- a Gateway to the world of Earth Science data and services. The CEOS IDN is an international effort developed to assist researchers in locating information on available datasets and services. The directory is sponsored as a service to the Earth science community. For more information, please visit the IDN Home Page (


Authors are expected to properly cite the source of any data discovered through the IDN when used in publications. Individual data collections should have their own Citation Information and Use Constraints metadata (see a collection’s View More Info).


Authors are expected to cite metadata obtained through the IDN publications using the following citation:
National Aeronautics and Space Administration (NASA), International Directory Network (IDN), 2020, Version 20.1.4. URL:

GCMD Keywords

Individuals and groups using the GCMD keywords should use the following citation:
Global Change Master Directory (GCMD). 2020. GCMD Keywords, Version 9.1.5. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page):