# mergeMapUpdate

Source: https://www.nianticspatial.com/docs/api/swift/NSDK.NSDKMapStorage.method-mergeMapUpdate/

mergeMapUpdate

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## Declaration

func mergeMapUpdate(existingMap: NSDKBuffer, mapUpdate: NSDKBuffer) throws -> NSDKBuffer

#### Summary

Merges a map update into an existing map.
This method combines incremental map updates with a base map to produce
a merged map buffer containing the complete map data.

#### Returns

The merged map buffer

#### Throws

NSDKError of type NSDKError.invalidArgumentor   NSDKError.nullArgument indicating a problem with either   argument . Check NSDK's C logs for more information.

### Parameters

| Name | Type | Summary |
| --- | --- | --- |
| existingMap | NSDKBuffer | The existing map to merge the update into. |
| mapUpdate | NSDKBuffer | The map update to merge into the existing map. |

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