# requestLocationMeshByAsset

Source: https://www.nianticspatial.com/docs/api/swift/NSDK.NSDKMeshDownloader.method-requestLocationMeshByAsset/

requestLocationMeshByAsset

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## Declaration

func requestLocationMeshByAsset(vpsMapAssetId: String, latitude: Double, longitude: Double, getTexture: Bool, maxChunks: UInt32 = 0, maxSizeKb: UInt32 = 0, pollingInterval: TimeInterval = 0.1) -> AsyncThrowingStream<MeshDownloaderChunk, Error>

#### Summary

Downloads mesh chunks for a portal asset, streaming each chunk as it completes.
Initiates a network request to the portal API for the given vpsMapAssetId. Graph nodes are
sorted by proximity to the provided GPS position and downloaded sequentially, closest first.
Each decoded chunk is yielded to the returned stream immediately upon completion, enabling
incremental mesh generation without waiting for the full download.

#### Returns

An AsyncThrowingStream that yields MeshDownloaderChunk values as they
  arrive and finishes when all chunks have been delivered.

#### Throws

  - CancellationError if the Task running this function was cancelled.   - MeshDownloaderResults/Error if the download encountered an error.

### Parameters

| Name | Type | Summary |
| --- | --- | --- |
| vpsMapAssetId | String | The portal VPS map asset ID string. |
| latitude | Double | User latitude in decimal degrees, used to sort nodes closest-first. |
| longitude | Double | User longitude in decimal degrees. |
| getTexture | Bool | If `true`, texture bytes are included in each chunk. |
| maxChunks | UInt32 | Maximum number of graph nodes to download. `0` means no limit. |
| maxSizeKb | UInt32 | Cumulative download cap in kilobytes. Once exceeded, no new nodes are scheduled; already-completed chunks are still delivered. `0` means no cap. |
| pollingInterval | TimeInterval | Interval between polls (default: 0.1 seconds). |

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