GCMD Metadata

NASA’s Global Change Master Directory (GCMD)

The Global Change Master Directory (GCMD) enables users to locate and obtain access to Earth science data sets and services relevant to global change and Earth science research.

http://globalchange.nasa.gov/

Contact Person

GCMD Staff

DIF Metadata Contact:
Scott Ritz

• 301-614-5126
• http://gcmd.nasa.gov/MailComments/MailComments.jsf?rcpt=ritz

SERF Metadata Contact:
Tyler Stevens

• 301-352-4619
• http://gcmd.nasa.gov/MailComments/MailComments.jsf?rcpt=stevens

Software Contact:
Thomas Cherry

• 301-614-6588
• http://gcmd.nasa.gov/MailComments/MailComments.jsf?rcpt=cherry

Types of Metadata

• Directory Interchange Format (DIF)
• Service Entry Resource Format (SERF)
• Ancillary Description-Instrument (AD-I)
• Ancillary Description-Platform (AD-Pl)
• Ancillary Description-Project (AD-Pr)
• Ancillary Description-Data Center (AD-DC)
• Import/Export FGDC metadata
• Import ISO 19115 metadata

Approximate number of Metadata Records

• 19,000 (DIFs and SERFs combined)

Rate at which Metadata are being created/added

• For DIFs on average, 173 new and 585 updates per month.
• For SERFs on average, 22 new and 61 updates per month.

Locally hosted metadata services

• Z39.50
• OAI PMH

External Metadata Registries

• FGDC Clearinghouse
• Geospatial One-Stop
• GeoConnections