Regions

Simplified, polygonized version of the forecast, representing contrail avoidance regions in GeoJSON multipolygon format.

Contrail avoidance regions are rated by severity levels. Severity levels are based on expected effective energy forcing values. Expected effective energy forcing is calculated as the product of the probabilities of contrail formation and the climate impact of these contrails. For a detailed explanation, refer to our Contrail forecasting guide.

Severity levels range from 1 to 4 for each flight level; 1 represents light risk and 4 represents extreme contrail risk.

Data format

Regions are in GeoJSON format containing a FeatureCollection:

{
  "type": "FeatureCollection",
  "features": [
      {
        "type": "Feature",
        "properties": {
            "time": "<ISO 8601 datetime>",
            "flightLevel": <int>,
            "threshold": <int>,
            "forecast_reference_time": "<ISO 8601 datetime>"
        },
        "geometry": {
          "type": "MultiPolygon",
          "coordinates": [...]
        }
      }
  ]
}

License

The region data exposed by the Forecast Regions API is licensed under CC BY 4.0.