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Element Description

The Cloud Cover element provides a measurement, as a percentage, of the area of a granule (i.e. an individual data file) that is obscured by clouds.

Best Practices

The Cloud Cover element is optional. Note that the underlying method used to determine cloud cover can vary by data product. The cloud cover percentage should be expressed as a number between 0-100.

Examples:

Cloud Cover: "50"

Cloud Cover: "0"

Cloud Cover: "30.5"

Element Specification

The Cloud Cover element is optional, and may not be repeated (Cardinality: 0..1)

Model	Element	Type	Constraints	Required?	Cardinality
UMM-G	CloudCover	Number	0 - 100	No	0..1

Metadata Validation and QA/QC

All metadata entering the CMR goes through the below process to ensure metadata quality requirements are met. All records undergo CMR validation before entering the system. The process of QA/QC is slightly different for NASA and non-NASA data providers. Non-NASA providers include interagency and international data providers and are referred to as the International Directory Network (IDN).

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Please see the expandable sections below for flowchart details.

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ARC Priority Matrix

Priority Categorization	Justification
Red = High Priority Finding	Not Applicable
Yellow = Medium Priority Finding	This element is categorized as medium priority when: The Cloud Cover value provided exceeds 100 or is a negative number. Evidence suggests the Cloud Cover value provided is inaccurate for the granule.
Blue = Low Priority Finding	Not Applicable
Green = No Findings/Issues	The element is provided and follows all applicable criteria specified in the best practices section above.

ARC Automated Checks

ARC uses the pyQuARC library for automated metadata checks. Please see the pyQuARC GitHub for more information.

Dialect Mappings

ECHO 10

Cloud Cover is optional in ECHO 10, and may not be repeated (Cardinality: 0..1).

UMM-G Element	ECHO 10 Path	Type	Constraints	Required in ECHO10?	Cardinality
CloudCover	CloudCover	Decimal	0 - 100	No	0..1

Example Mapping

ECHO 10

<CloudCover>50.0</CloudCover>

UMM

"CloudCover": 50.0,

ISO 19115-2 MENDS

The Cloud Cover element is optional in ISO 19115-2. The path may be repeated in ISO, but only the first value provided will be translated to the CMR (Cardinality: 0..1).

UMM-G Element	ISO Path	Type	Notes
CloudCover	/gmi:MI_Metadata/gmd:contentInfo/gmd:MD_ImageDescription/gmd:attributeDescription/gco:RecordType = CloudCover /gmi:MI_Metadata/gmd:contentInfo/gmd:MD_ImageDescription/gmd:contentType/gmd:MD_CoverageContentTypeCode codeList="https://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#MD_CoverageContentTypeCode" codeListValue="physicalMeasurement" = physicalMeasurement /gmi:MI_Metadata/gmd:contentInfo/gmd:MD_ImageDescription/gmd:cloudCoverPercentage/gco:Real = {the actual Cloud Cover value}	Decimal	This element maps to the UMM-G Element Cloud Cover.

Example Mapping

ISO 19115-2 MENDS

<gmi:MI_Metadata>
  <gmd:contentinfo>
    <gmd:MD_ImageDescription>
      <gmd:attributeDescription>
        <gco:RecordType>CloudCover</gco:RecordType>
      </gmd:attributeDescription>
      <gmd:contentType>
        <gmd:MD_CoverageContentTypeCode codeList="https://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#MD_CoverageContentTypeCode" codeListValue="physicalMeasurement">physicalMeasurement</gmd:MD_CoverageContentTypeCode>
      </gmd:contentType>
      <gmd:cloudCoverPercentage>
        <gco:Real>50.0</gco:Real>
      </gmd:cloudCoverPercentage>
    </gmd:MD_ImageDescription>
  </gmd:contentinfo>
</gmi:MI_Metadata>

UMM

"CloudCover": 50.0,

ISO 19115-2 SMAP

The Cloud Cover element currently does not map to ISO 19115-2 SMAP.

UMM-G Element	ISO Path	Type	Notes
Cloud Cover	N/A	N/A	N/A

Example Mapping

ISO 19115-2 SMAP

N/A

UMM

N/A

UMM Migration

UMM Version 1.4.0	Translation Direction	UMM Version 1.5.0

History

UMM Versioning

Version	Date	What Changed
1.6.0	11/4/2019	No changes were made for Cloud Cover during the transition from version 1.5.0 to 1.6.0.
1.5.0	01/30/2019	No changes were made for Cloud Cover during the transition from version 1.4.0 to 1.5.0.
1.4.0	08/01/2018	No changes were made for Cloud Cover during the transition from version 1.3.0 to 1.4.0.

ARC Documentation

Version	Date	What Changed	Author
1.0	04/12/2019	Recommendations/priority matrix transferred from internal ARC documentation to wiki space	Camille Woods Jeanne' le Roux