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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 Granule UR is required 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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title	CMR Validation

<>

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title	ARC Metadata QA/QC

ARC Priority Matrix

Not Applicable

Priority Categorization	Justification
Red = High Priority Finding	Not Applicable
Yellow = Medium Priority Finding	This element is categorized as highest medium priority when: The Granule UR is not provided The Granule UR is incorrect for the granule 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	Not Applicable	The element is provided and follows all applicable criteria specified in the best practices section above.

ARC Automated RulesChecks

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

Dialect Mappings

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title	ECHO 10

ECHO 10

Granule UR is required for ECHO 10Cloud 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
GranuleURCloudCoverGranuleUR	CloudCover	String	n/a	Yes	Decimal	0 - 100	No	0..1

Example Mapping

Section

Column

width	50%

ECHO 10

No Format
<GranuleUR>MA_AMSUA_NOAA17_OMF.001:merra.mon_stdv3d_amsua_noaa17_omf.200212_06z.nc</GranuleUR><CloudCover>50.0</CloudCover>

Column

width	50%

UMM

No Format
"GranuleURCloudCover": "AIRS2CCF_NRT.006:AIRS.2018.10.18.189.L2.CC_IR.v6.0.31.0.R18291162512.hdf"50.0,

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title	ISO 19115-2 MENDS

ISO 19115-2 MENDS

The path where Granule UR is provided in ISO is optional, however, a Granule UR is required for all granule metadata submitted 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

GranuleURCloudCover

/gmi:MI_Metadata/gmd:identificationInfocontentInfo/gmd:MD_DataIdentificationImageDescription/gmd:citation/gmd:CI_Citation:attributeDescription/gco:RecordType = CloudCover
/gmi:MI_Metadata/gmd:identifiercontentInfo/gmd:MD_Identifier/ [=>

[=>gmd:code/gco:CharacterString {the actual Granule UR}

[=>gmd:codeSpace/gco:CharacterString= gov.nasa.esdis.umm.granuleur

[=>gmd:description/gco:CharacterString = GranuleUR

String

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

Provide the GranuleUR in the gmd:code field.

Provide the string"gov.nasa.esdis.umm.granuleur" in the gmd:codeSpace field. The CMR will use this string to parse out the appropriate GranuleUR value.

Also provide the string "GranuleUR" in the gmd:description field. The CMR will use this string to parse out the appropriate GranuleUR value.

Example Mapping

Section

Column

width	50%

ISO 19115-2 MENDS

No Format

<gmi:MI_Metadata>
  <gmd:identificationInfo>contentinfo>
    <gmd:MD_DataIdentification>ImageDescription>
      <gmd:citation>
        <gmd:CI_Citation>attributeDescription>
          <gmd:identifier>
            <gmd:MD_Identifier>
              <gmd:code>
                <gco:CharacterString>AIRS2CCF_NRT.006:AIRS.2018.10.18.189.L2.CC_IR.v6.0.31.0.R18291162512.hdf</gco:CharacterString>
       <gco:RecordType>CloudCover</gco:RecordType>
       </gmd:code>attributeDescription>
              <gmd:codeSpace>contentType>
                <gco:CharacterString>gov.nasa.esdis.umm.granuleur</gco:CharacterString>
        <gmd:MD_CoverageContentTypeCode codeList="https://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#MD_CoverageContentTypeCode" codeListValue="physicalMeasurement">physicalMeasurement</gmd:MD_CoverageContentTypeCode>
      </gmd:codeSpace>contentType>
              <gmd:description>cloudCoverPercentage>
                <gco:CharacterString>GranuleUR<Real>50.0</gco:CharacterString>Real>
              </gmd:description>cloudCoverPercentage>
            </gmd:MD_Identifier>
        ImageDescription>
  </gmd:identifier>
        </gmd:CI_Citation>
      </gmd:citation>
    </gmd:MD_DataIdentification>
  </gmd:identificationInfo>contentinfo>
</gmi:MI_Metadata>

Column

width	50%

UMM

No Format
{ "GranuleURCloudCover": "AIRS2CCF_NRT.006:AIRS.2018.10.18.189.L2.CC_IR.v6.0.31.0.R18291162512.hdf", }50.0,

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title	ISO 19115-2 SMAP

ISO 19115-2 SMAP

The path where Granule UR is provided in ISO is optional, however, a Granule UR is required for all granule metadata submitted to the CMR (Cardinality: 0..1)Cloud Cover element currently does not map to ISO 19115-2 SMAP.

UMM-G Element

ISO Path

Type

Notes

GranuleURCloud Cover

/gmd:DS_Series/gmd:composedOf/gmd:DS_DataSet/gmd:has/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/ gmd:citation/gmd:CI_Citation/gmd:title/gco:CharacterString {the actual Granule UR}

with

/gmd:DS_Series/gmd:composedOf/gmd:DS_DataSet/gmd:has/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/ gmd:purpose/gco:CharacterString = GranuleUR

String

Provide the GranuleUR in the gmd:code field.

Provide the string"gov.nasa.esdis.umm.granuleur" in the gmd:codeSpace field. The CMR will use this string to parse out the appropriate GranuleUR value.

Also provide the string "GranuleUR" in the gmd:description field. The CMR will use this string to parse out the appropriate GranuleUR value.

N/A

Example Mapping

Section

Column

width	50%

ISO 19115-2 SMAP

No Format

<gmd:DS_Series>
  <gmd:composedOf>
    <gmd:DS_DataSet>
      <gmd:has>
        <gmi:MI_Metadata>
          <gmd:identificationInfo>
            <gmd:MD_DataIdentification>
              <gmd:purpose>
                <gco:CharacterString>GranuleUR</gco:CharacterString>
              </gmd:purpose>
              <gmd:citation>
                <gmd:CI_Citation>
                  <gmd:title>
                    <gco:CharacterString>AIRS2CCF_NRT.006:AIRS.2018.10.18.189.L2.CC_IR.v6.0.31.0.R18291162512.hdf</gco:CharacterString>
                  </gmd:title>
                </gmd:CI_Citation>
              </gmd:citation>
            </gmd:MD_DataIdentification>
          </gmd:identificationInfo>
        </gmi:MI_Metadata>
      </gmd:has>
    </gmd:DS_DataSet>
  </gmd:composedOf>
</gmd:DS_Series>N/A

Column

width	50%

UMM

No Format
"GranuleUR": "AIRS2CCF_NRT.006:AIRS.2018.10.18.189.L2.CC_IR.v6.0.31.0.R18291162512.hdf"N/A

UMM Migration

UMM Version 1.4.0	Translation Direction	UMM Version 1.5.0

Future Mappings

History

expand

UMM Versioning

title	ISO 19115-1

ISO 19115-1

SpecificationPathTypeNotesISO 19115-1
N/A

String

N/A

Example Mapping

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.

Section

Column

width	50%

ISO 19115-1

No Format
N/A

Column

width	50%

UMM

No Format
"GranuleUR": "AIRS2CCF_NRT.006:AIRS.2018.10.18.189.L2.CC_IR.v6.0.31.0.R18291162512.hdf",

History

UMM Versioning

Version	Date	What Changed
1.5.0	01/30/2019	No changes were made for Granule UR 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 Granule UR Cloud Cover during the transition from version 1.3.0 to 1.4.0.

ARC Documentation

Version	Date	What Changed	Author
1.0	0204/1512/2019	Recommendations/priority matrix transferred from internal ARC documentation to wiki space	Camille Woods Jeanne' le Roux

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Versions Compared

Old Version 1

New Version Current

Key

Element Description

Best Practices

Element Specification

Metadata Validation and QA/QC

Dialect Mappings

ECHO 10

ISO 19115-2 MENDS

ISO 19115-2 SMAP

UMM Migration

History

UMM Versioning

ISO 19115-1

History

UMM Versioning

ARC Documentation