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# isValidViewportArea()

- Package: [@gooddata/sdk-ui-geo](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-ui-geo/index.md)
- Kind: function
- Source: https://github.com/gooddata/gooddata-ui-sdk/blob/rel/11.64/libs/sdk-ui-geo/src/next/types/config/viewport.ts

Type guard verifying supported viewport presets.

**Signature:**

```typescript
export declare function isValidViewportArea(value: string): value is IGeoChartViewportArea;
```

## Parameters

| Parameter | Type | Description |
| --- | --- | --- |
| value | string |  |

**Returns:**

value is [IGeoChartViewportArea](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-ui-geo/sdk-ui-geo.igeochartviewportarea/index.md)