Interim Collection Comparison Report for Big Earth Data Initiative
Metadata Source: CMR Metadata Collections
Metadata Dialect: ISO 19115-2
Evaluation Target: UMM-Collection metadata profile
The Unified Metadata Model Collection (UMM-Collection) profile describes documentation concepts that are considered important for collection level metadata. The profile is includes three documentation levels (Required, Recommended and Optional).
Metadata Collection
Overview
We examined over 15,000 metadata records from 26 collections extracted from the Common Metadata Repository (CMR) during April 2016. The links below connect to tables in google sheets which provide the average number of occurrences of UMM-Collection elements in each of these collections. A value of 1 or more typically (although not necessarily) indicates that the element is included one or more times in each record in a collection. A value < 1.0 is typically the percentage of records in a collection that include the metadata element. Cells with pink backgrounds indicate values of 0, meaning the element is completely missing from the collection.
Overall CMR metadata collections are doing a very good job of documenting Required UMM-Collection concepts. The link below shows a google sheets comparison view of Required UMM-Collection concept usage across CMR metadata collections. The pink shaded cells near the bottom of the table indicate required elements that are missing for some of the collections.
Table 1: Collection Comparison of UMM-Collection Required Elements
Highlights
The link below provides a google sheets comparison view of Recommended UMM-Collection concept usage across CMR metadata collections. The pink shaded cells near the bottom of the table indicate recommended elements that are missing for some of the collections.
Table 2: Collection Comparison of UMM-Collection Recommend Elements
Analysis
The link below provides a google sheets comparison view of Recommended UMM-Collection concept usage across CMR metadata collections. The pink shaded cells near the bottom of the table indicate recommended elements that are missing for some of the collections.
Table 3: Collection Comparison of UMM-Collection Optional Elements
Analysis