Page History
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Group Title | # Records | Group History | Major components - # Records |
NASA | 6367 | Traditional DAAC Metadata – ECHO Dialect | GES-DISC – 1044 ORNL – 1216 18 DAAC Collections |
IDN | 8702 | Non-NASA Collections – Managed by SciOps – Typically, DIF dialect | NOAA_NCEI – 5488 AU_AADC – 2559 8 Miscellaneous Collections |
SciOps (formerly GCMD) | 5465 | Miscellaneous, mostly non-NASA – DIF Dialect | NZ – 857 UCAR – 437 ACADIS – 393 Korea Polar - 329 |
Comparisons between these metadata groups are influenced by the fact that the collections that originate in ECHO contain much more content (406 items) than the collections that originate in DIF (175 items). Much of this content is related to additional attribute information and detailed contact information that exists in ECHO but not DIF.
NASA vs. IDN Comparison
The IDN group includes metadata collections from many large international data producers and providers. We had anticipated that these collections might provide insight into metadata practices and priorities of these organizations. In fact, these metadata are collected and shepherded into the CMR by SciOps and it appears that they reflect SciOps metadata management practices more than they reflect the metadata practices of the originating organizations. See NASA vs. IDN for the comparison.
NASA vs. SciOps Comparison
The SciOps group includes over 13,000 metadata records that originated in the GCMD and were provided by nearly 2000 data providers, all non-IDN members. These providers are diverse and over 1700 of them have less than ten records. We selected twenty-five providers with more than 100 records for the comparison of NASA vs. SciOps.
- Commonly Used Documentation Objects (CUDOs)
- Comparing element usage in NASA 2016 vs NASA 2017 metadata collections in the CMR
- Comparing element usage in NASA vs IDN metadata collections in the CMR
- Comparing element usage in NASA vs SciOps metadata collections in the CMR
- UMM-Collection Metadata Completeness in the CMR
- UMM-Collection Metadata Usage
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