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The table below shows the distribution of Related URL fields represented in ISO 19115-2 for CMR metadata collections. This table focuses on links for accessing distribution content for the resource described by the metadata. 

We examined 2158 4180 metadata records from 16 17 collections extracted from the CMR during October 2015March 2016. 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. Empty cells which indicate a value of 0 are shaded in pink.  Pink cells indicate the element is completely missing from the collection.

The analysis below shows that Online Link URL elements are populated to some extent in all the collections evaluated .  The LARC collections show a completeness values of < then one, which indicates not all records in the collection include this field. Otherwise, all other CMR collections include at least 1 Online Link URL.  The Link Name and Link Description elements are missing from some of the collections. This may be an improvement focus area for those collections.  with the exception of OMINRT. The application Profile element is missing from all the collections except OB_DAAC and ORNL_DAAC.

Table 1:  Distribution of Related URL fields in CMR metadata collections

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Collection Metadata - March 2016