# extractMetadata

Source: https://www.nianticspatial.com/docs/api/kotlin/com.nianticspatial.nsdk.mapping.MappingStorageSession.extractMetadata/

extractMetadata

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## Declaration

fun extractMetadata(anchorPayload: String, map: ByteArray): MapMetadata?

#### Summary

Extract the metadata from a map relative to a specified anchor.

Render the feature points in the metadata relative to the specified anchor to visualize the map.
This is only possible when the anchor is linked directly to the map's node(s), or if the
anchor's nodes are reachable to the map's nodes from the currently active transform graph.

#### Returns

The extracted metadata if successful, or null if no metadata exists.

#### Throws

ArdkNullArgumentStatusException -- or ArdkInvalidArgumentStatusException indicating a problem with the either argument. Check ARDK's C logs for more information.

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