---
title: properties
framework: mapkit
role: symbol
role_heading: Instance Property
path: mapkit/mkgeojsonfeature/properties
---

# properties

Optional serialized JSON data that corresponds to the properties key.

## Declaration

```swift
var properties: Data? { get }
```

## Discussion

Discussion MapKit exposes these optional properties but treats them as opaque.

## See Also

### Feature properties

- [geometry](mapkit/mkgeojsonfeature/geometry.md)
- [identifier](mapkit/mkgeojsonfeature/identifier.md)