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# isGeoLayerType()

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

Type guard for geo layer type.

**Signature:**

```typescript
export declare function isGeoLayerType(layerType: string): layerType is GeoLayerType;
```

## Parameters

| Parameter | Type | Description |
| --- | --- | --- |
| layerType | string |  |

**Returns:**

layerType is [GeoLayerType](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-model/sdk-model.geolayertype/index.md)