# Area

Features representing topographic objects that have a polygon-based geometry.

<figure><img src="https://1897589978-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FcNpJpLP8RROUaWVQo5ea%2Fuploads%2FyOPLsGhKYhrkTdoZJMn8%2Fimage.png?alt=media&#x26;token=e7afa2cc-ca13-41fe-b92d-957ef66bdbd7" alt="UML diagram of the Area Feature Type, listing its four attributes. The feature type and its attributes are described in detail in the FeatureType Area table." width="315"><figcaption><p>UML diagram showing the Area Feature Type in the GML supply.</p></figcaption></figure>

## Area attributes

### polygon

A polygon is a single closed region defined by a set of lines that represent the boundaries.

* **Type:** GM\_Surface
* **Length:** N/A
* **Multiplicity:** \[1]

### featureID

A unique feature identification. IDs will be retained between iterations, but they will not be version controlled.

* **Type:** CharacterString
* **Length:** 38
* **Multiplicity:** \[1]

### featureCode

A unique feature code to facilitate analysis and styling.

* **Type:** [FeatureCodeValue](https://docs.os.uk/os-downloads/products/maps-and-imagery-portfolio/os-vectormap-local/os-vectormap-local-technical-specification/feature-codes-and-descriptions)
* **Length:** 5
* **Multiplicity:** \[1]

### featureDescription

A description of the feature code.

* **Type:** [FeatureDescriptionValue](https://docs.os.uk/os-downloads/products/maps-and-imagery-portfolio/os-vectormap-local/os-vectormap-local-technical-specification/feature-codes-and-descriptions)
* **Length:** 60
* **Multiplicity:** \[1]