­Overview

This evaluation compares the usage of metadata elements in NASA Collections with SciOPs Collections.  The CMR includes metadata collections from 18 NASA providers and from 25 SciOps providers.  NASA collections come from the Common Metadata Repository (CMR), and the SciOps collections come from the Global Change Master Directory (GCMD).

Data Selection

The table below shows the collection included in this evaluation as well as the record count for each collection.

Table 1. Collections and record counts

SciOps vs. NASA

This analysis compares element usage in the 18 NASA collection with the 8 non NASA (Other) collections.  This evaluation identifies elements which exist in collections as well as elements that are complete in collections.  In order for an element to exist in a collection it must be present in at least 1 metadata record included in the collection. In order for an element to be complete in a collection it must be present in all metadata records included in the collection. 

Element usage for NASA collections and Other collections is shown below using bubble charts.  The bubble chart interpretation graphic provides a schematic for interpreting the bubble plots. 

Bubble Chart Interpretation

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NASA Exist vs OTHER Exist

Chart 1 below compares element existence in NASA Collections with Other collections.  The X axis shows the number of NASA collections that include an element. The Y axis shows number of Other collections that include an element.  The bubble size shows the number of elements included in the 2 collections.

The large blue bubble in the upper right corner of the plot shows the items (elements and attributes) that exist is all 18 NASA collections and in all 8 Other collections.  This bubble includes 51 items, as shown in the legend.  The large red bubble in the lower left corner of the plot shows items that exist is 1 NASA collection and in 0 Other collections.  This bubble includes 44 elements, as shown in the legend. The data for Chart 1 is accessible in Google Sheets.  To view the data and bubble chart in Google Sheets click on the image. 

Chart 1: NASA EXIST vs Other Exists

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Accessing the Chart

To access the data for this chart, click on the chart graphic above to view an interactive version in Google Sheets.  The interactive version enables data identification for each bubble and includes a look up table for identifying the ISO elements associated with the bubble. To access and use the interactive version:

1. Click on the chart graphic above to view the chart in Google Sheets
2. Hover over the bubbles with your mouse to identify the concept existence in NASA collections and concept existence in Other collections associated with the bubble.  The hover identification also shows the number of element (Counts) associated with each bubble.
3. To the right of the chart is a lookup table for identifying the xpaths associated with each of the bubbles.  To identify the xpaths associated with a bubble, match the NASA Exists and Other Exists values from the bubble hover with the values in the look up table.

NASA Complete vs OTHER Complete

Chart 2 below compares element completeness in NASA Collections with Other collections.  The X axis shows the number of NASA collections that are complete with respect to an element. The Y axis shows number of Other collections that are complete with respect to an element  The bubble size shows the number of elements included in the 2 collections.

The large red bubble in the upper right corner of the plot shows items (elements and attributes) that are complete is all 18 NASA collections and in all 8 Other collections.  This bubble includes 27 elements, as shown in the legend.  The large blue bubble in the lower left corner of the plot shows the items that are complete in 1 NASA collection and in 0 Other collections.  This bubble includes 38 items, as shown in the legend. The data for Chart 2 is accessible in Google Sheets.  To view the data and bubble chart in Google Sheets click on the image.

Chart 2: NASA Complete vs Other Complete

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Accessing the Chart

To access the data for this chart, click on the chart graphic above to view an interactive version in Google Sheets.  The interactive version enables data identification for each bubble and includes a look up table for identifying the ISO elements associated with the bubble. To access and use the interactive version:

1. Click on the chart graphic above to view the chart in Google Sheets
2. Hover over the bubbles with your mouse to identify the number of complete NASA collections and the number of complete Other collections associated with the bubble.  The hover identification also shows the number of element (Counts) associated with each bubble.
3. To the right of the chart is a lookup table for identifying the xpaths associated with each of the bubbles.  To identify the xpaths associated with a bubble, match the NASA Provided Complete and Other Provided Complete values from the bubble hover with the values in the look up table.

Elements in all NASA and Other Collections

Twenty-seven items (elements and attributes) are in all NASA and all Other Collections:  See the All NASA and All Other filtered view to identify these elements.

Elements in all Other Collections and some NASA Collections

Nineteen items (elements and attributes) are present in all Other collections and in a smaller number of NASA collections. See the All Other and Some NASA filtered view to identify these items.

Ted please double check this filter.  The table below includes 52 items not 19

Table 2. Metadata Elements that are in all Other and in a smaller number of NASA collections

Elements in some NASA Collections and no Other Collections

One hundred and fifteen items (elements and attributes) are present in 0 Other collections and in a some number of NASA collections. See the No Other and Some NASA filtered view to identify these items.

Other Filters

• View just Elements
• View just Attributes