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ISO19115-2 adds description about imagery data and acquisition information (and is available in ISO19115-3).

Add index fields related to imagery:

"imageDescription": [
      {
        "processingLevelCode": "L2",
        "illuminationElevationAngle": 1,
        "illuminationAzimuthAngle": 2,
        "imagingCondition": {
          "key": "degradingObliquity",
          "default": "Dégradation oblique",
          "langfre": "Dégradation oblique",
          "langeng": "Degrading obliquity",
          "link": "http://standards.iso.org/iso/19115/resources/Codelists/cat/codelists.xml#MD_ImagingConditionCode"
        },
        "imageQualityCode": "QC1",
        "cloudCoverPercentage": 22,
        "radiometricCalibrationDataAvailability": true,
        "filmDistortionInformationAvailability": true
      }
    ],
    "mac_instrument": [
      {
        "code": "MODIS",
        "mountedOn": "AQUA"
      },
      {
        "code": "OLCI",
        "mountedOn": "Sentinel-3 A"
      },
      {
        "code": "OLCI",
        "mountedOn": "Sentinel-3 B"
      }
    ],
    "mac_operation": [
      {
        "descriptionObject": {
          "default": "MISSION",
          "langfre": "MISSION"
        }
      }
    ],
    "mac_platform": [
      {
        "code": "PLATFORM"
      }
    ],
    "mac_acquisitionPlan": [
      {
        "cl_type": {
          "key": "linear",
          "default": "Linear",
          "langfre": "Linear",
          "langeng": "Linear",
          "link": "http://standards.iso.org/iso/19115/resources/Codelists/cat/codelists.xml#MI_GeometryTypeCode"
        },
        "cl_status": {
          "key": "historicalArchive",
          "default": "Archivé",
          "langfre": "Archivé",
          "langeng": "Historical archive",
          "link": "http://standards.iso.org/iso/19115/resources/Codelists/cat/codelists.xml#MD_ProgressCode"
        }
      }
    ],
    "mac_environmentalConditions": [
      {
        "averageAirTemperature": 1,
        "maxRelativeHumidity": 2,
        "maxAltitude": 3,
        "meterologicalConditions": {
          "default": "GOOD",
          "langfre": "GOOD"
        },
        "solarAzimuth": 2,
        "solarElevation": 2
      }
    ],

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ISO19115-2 adds description about imagery data and acquisition information (and is available in ISO19115-3).

Add index fields related to imagery:
* add support for main STAC search fields (eg. https://github.com/radiantearth/stac-spec/blob/master/commons/common-metadata.md#instrument)
* add support for configuration of aggregations on those common fields for imagery dataset search (eg. processing level, instruments)

```json
"imageDescription": [
      {
        "processingLevelCode": "L2",
        "illuminationElevationAngle": 1,
        "illuminationAzimuthAngle": 2,
        "imagingCondition": {
          "key": "degradingObliquity",
          "default": "Dégradation oblique",
          "langfre": "Dégradation oblique",
          "langeng": "Degrading obliquity",
          "link": "http://standards.iso.org/iso/19115/resources/Codelists/cat/codelists.xml#MD_ImagingConditionCode"
        },
        "imageQualityCode": "QC1",
        "cloudCoverPercentage": 22,
        "radiometricCalibrationDataAvailability": true,
        "filmDistortionInformationAvailability": true
      }
    ],
    "mac_instrument": [
      {
        "code": "MODIS",
        "mountedOn": "AQUA"
      },
      {
        "code": "OLCI",
        "mountedOn": "Sentinel-3 A"
      },
      {
        "code": "OLCI",
        "mountedOn": "Sentinel-3 B"
      }
    ],
    "mac_operation": [
      {
        "descriptionObject": {
          "default": "MISSION",
          "langfre": "MISSION"
        }
      }
    ],
    "mac_platform": [
      {
        "code": "PLATFORM"
      }
    ],
    "mac_acquisitionPlan": [
      {
        "cl_type": {
          "key": "linear",
          "default": "Linear",
          "langfre": "Linear",
          "langeng": "Linear",
          "link": "http://standards.iso.org/iso/19115/resources/Codelists/cat/codelists.xml#MI_GeometryTypeCode"
        },
        "cl_status": {
          "key": "historicalArchive",
          "default": "Archivé",
          "langfre": "Archivé",
          "langeng": "Historical archive",
          "link": "http://standards.iso.org/iso/19115/resources/Codelists/cat/codelists.xml#MD_ProgressCode"
        }
      }
    ],
    "mac_environmentalConditions": [
      {
        "averageAirTemperature": 1,
        "maxRelativeHumidity": 2,
        "maxAltitude": 3,
        "meterologicalConditions": {
          "default": "GOOD",
          "langfre": "GOOD"
        },
        "solarAzimuth": 2,
        "solarElevation": 2
      }
    ],
```
@fxprunayre fxprunayre added this to the 4.4.10 milestone Oct 17, 2025
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