---
title: id
framework: mapkitjs
role: symbol
role_heading: Interface Property
path: mapkitjs/annotationconstructoroptions/id
---

# id

A Place ID that uniquely identifies a feature.

## Declaration

```data
id?: string;
```

## Discussion

Discussion For information about identifiers, see Identifying unique locations with Place IDs.

## See Also

### Grouping annotations

- [clusteringIdentifier](mapkitjs/annotationconstructoroptions/clusteringidentifier.md)
- [collisionMode](mapkitjs/annotationconstructoroptions/collisionmode.md)