CEOS Development Environment

International Directory Network (IDN)


The International Directory Network (IDN) Interest Group is responsible for coordinating activities among participating international agencies to maintain, improve, and expand the functions and use of the CEOS International Directory Network (IDN).

The CEOS IDN Master Directory assists researchers by providing free, online access to information on scientific datasets (metadata)  in the Earth sciences, including geoscience, hydrospheric science, biospheric science, satellite remote sensing, and atmospheric science. This metadata describes data held by university departments, government agencies, multinational organizations, and other organizations all over the world. It is maintained using the standard Directory Interchange Format (DIF) and Service Entry Resource Format (SERF).


IDN efforts include:

  • Maintaining IDN website content
  • Maintaining the IDN server and clients to improve metadata search capabilities
  • Maintaining and adding new metadata records from CEOS Agencies
  • Maintaining usage statistics and reporting them to CEOS Agencies
  • Maintaining DIF and SERF metadata standards using the INTEROP forum
  • Creating new CEOS portals as requested by partners


Learn more on the Global Change Master Directory (GCMD) website.


Communication and Coordination

IDN Website


Please feel free to contact this Interest Group for more information:

Michael P. Morahan
National Aeronautics and Space Administration (NASA)
Goddard Space Flight Center / Code 423
Greenbelt, MD 20771