Knowledgebase : Global Change Master Directory (GCMD)
About the GCMD
The GCMD holds more than 35,000 Earth science data set and service descriptions, which cover subject areas within the Earth and environmental sciences.  The project mission is to assist researchers, policy makers, and the public in the discovery of and ac...
Adding a Dataset or Data Service Description to the GCMD
If you have a data set or service that is relevant to global change, consider advertising to the scientific community through the GCMD using the docBUILDER metadata authoring tool. The GCMD is not limited to governmental datasets nor is it restricted t...
GCMD Portals
A GCMD "portal" is defined as a virtual subset of the complete content of the directory. Recognizing the importance of customization for partner organizations, the staff generates subset views of the GCMD directory through "conceptual" portals. Portals ha...
How To Use the GCMD
The GCMD has made it very easy for the public to locate the data sets they desire. All the metadata are accessible via several search interfaces. Search Options: * Earth Science Keywords: Search results can be modified Science discipline, geographic...
Scientific Disciplines Included in the GCMD
The GCMD contains descriptions of data sets covering all disciplines that produce and use data to help us understand our changing planet. The GCMD includes metadata from disciplines including atmospheric science, biology, oceanography, ecology, geology...
Types of Metadata Formats in the GCMD
EARTH SCIENCE DATA SET DESCRIPTIONS * Directory Interchange Format (DIF) * Describes Earth Science and Climate Data * More information: http://gcmd.nasa.gov/add/difguide/whatisadif.html [http://gcmd.nasa.gov/add/difguide/whatisadif.html] EARTH S...