Online catalogs, such as the Federal Geographic Data Committee (FGDC) Clearinghouse (FGDC 1996), NASA's Global Climate Master Directory (GCMD
, http://gcmd.gsfc.nasa.gov/), and NASA's EOS Clearinghouse (ECHO, http://www.echo.eos.nasa.gov/) have been developed to facilitate the discovery of the services.
NASA'S Global Change Master Directory (gcmd
.gsfc.nasa.gov/Resources/pointers/glob_warm.html) serves as a clearinghouse of links to hundreds of Web sites about global warming.
The National Aeronautics and Space Administration's Global Change Master Directory (GCMD
) (http://gcmd.nasa.govl) is a comprehensive, searchable source of data and information with broad coverage of the atmosphere, hydrosphere, solid earth, and biosphere .
This interface was included in 1997 within the operational GCMD
where it is offered as an alternative experimental service (http://gcmd.nasa.gov).
They utilized the generalized cumulative minimum deviation (GCMD
) rule and compared it to three other rules.
It is compatible with WIS and the Global Change Master Directory (GCMD