def _convert_json_properties(properties):
    """
    Convert a geojson expression of the properties of a sector into a
    list of properties. Properties are in a dictionary.

    The geojson has no object id field so we inject one.
    """
    return [properties['AC_ID'], properties['AV_AIRSPACE_ID'],
            properties['AV_ICAO_STATE_ID'], properties['MIN_FLIGHT_LEVEL'],
            properties['MAX_FLIGHT_LEVEL'], properties['AV_NAME'],
            properties['SECTOR_TYPE'], '0']