Summary
Any data that will need to be discoverable on Earthdata Search will need a corresponding metadata file. This metadata file will have a .cmr.json file extension, and should follow the UMM-G schema. Even if the data file itself has metadata in it, there will still need to be a separate metadata file to go along with the data file. For Non-Orderable data, no metadata file is necessary.
Resources
- This repository contains some schema information and examples: https://github.com/nasa/Common-Metadata-Repository/tree/master/umm-spec-lib/resources/json-schemas/granule/umm/v1.6.4
- Here is more (potentially outdated) documentation: UMM-G Schema Representation
Sample UMM-G Metadata File
TEMPO_CLDRR_L2_V01_20130715T175956Z_S007G01.nc.cmr.json
Other Examples
To find other samples of UMM-G granule metadata, the steps are roughly:
- Visit Earthdata Search
- Find any Collection
- Go into the Collection's Granules
- Find the UMM-G metadata
- Click the vertical bullet points in the top right corner of the Granule card
- Click 'View details'
- Click the 'Metadata' tab
- Click 'UMM-G'
For example, here are some Granules listed for a CERES Collection: https://search.earthdata.nasa.gov/search/granules?p=C2246001744-LARC_ASDC&pg[0][v]=f&pg[0][gsk]=-start_date&g=G2357541423-LARC_ASDC&fi=CERES-FM6&as[instrument][0]=CERES-FM6&tl=1662735013!3!!&lat=25.3125&long=0.140625&zoom=1
For any of those Granules, you can click the three vertical bullet points in the top right of the granule, click ‘View details,’ click the ‘Metadata’ tab, and then click 'UMM-G'. Here is a sample page when following these steps: https://cmr.earthdata.nasa.gov/search/concepts/G2357541423-LARC_ASDC.umm_json
Support
If you need any metadata help, reach out to the metadata team (Susan Haberer and Hazem Mahmoud )
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