# Region

Regions define political or geographical groupings of countries or territories.

For example, the [European Union](https://en.wikipedia.org/wiki/European_Union) is defined as a list of countries, while [Europe](https://en.wikipedia.org/wiki/Europe) is defined geographically by a series of polygons.

There is one special region that includes all countries in the world and has special AID `RGN-WRLD-WIDE`

The Region object includes the following properties:

| Property       | Type         | Description                                                                                                                                                                                   |
| -------------- | ------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `aid`          | string       | The aviowiki ID for this Region, with naspace `RGN`                                                                                                                                           |
| `name`         | string       | The name assigned to the Region.                                                                                                                                                              |
| `countries`    | list, `null` | <p>A list of <a href="country">Countries</a> that are included in the Region.<br><code>null</code> indicates that the Region is not defined by any Country.</p>                               |
| `multipolygon` | list, `null` | <p>A list of polygons, that are on their own a list of Coordinates that define the vertices of the polygon.<br><code>null</code> indicates that the Region is not defined by any polygon.</p> |

For example

```
{
  "aid": "RGN-DOCS-TEST",
  "name": "Test Region",
  "countries": [
    {
      "iso2": "FO",
      "iso3": "FRO",
      "isoNumeric": 234,
      "name": "Faroe Islands",
      "officialName": null,
      "localIdentifierName": null
    }
  ],
  "multipolygon": [
    [
      [
        3.7792969,
        80.9491884
      ],
      [
        41.0449219,
        80.9422728
      ],
      [
        18.984375,
        73.4033377
      ]
    ]
  ]
}
```

Represents a Region that includes Faroes Islands as a Country, and Svalbard as a geographical area enclosed in a triangle.