---
title: kCGImagePropertyGPSSpeedRef
framework: imageio
role: symbol
role_heading: Global Variable
path: imageio/kcgimagepropertygpsspeedref
---

# kCGImagePropertyGPSSpeedRef

The unit for expressing the GPS receiver’s speed of movement.

## Declaration

```swift
let kCGImagePropertyGPSSpeedRef: CFString
```

## See Also

### Measurement Details

- [kCGImagePropertyGPSStatus](imageio/kcgimagepropertygpsstatus.md)
- [kCGImagePropertyGPSSatellites](imageio/kcgimagepropertygpssatellites.md)
- [kCGImagePropertyGPSMeasureMode](imageio/kcgimagepropertygpsmeasuremode.md)
- [kCGImagePropertyGPSDOP](imageio/kcgimagepropertygpsdop.md)
- [kCGImagePropertyGPSSpeed](imageio/kcgimagepropertygpsspeed.md)
- [kCGImagePropertyGPSTrackRef](imageio/kcgimagepropertygpstrackref.md)
- [kCGImagePropertyGPSTrack](imageio/kcgimagepropertygpstrack.md)
- [kCGImagePropertyGPSMapDatum](imageio/kcgimagepropertygpsmapdatum.md)
- [kCGImagePropertyGPSProcessingMethod](imageio/kcgimagepropertygpsprocessingmethod.md)
- [kCGImagePropertyGPSAreaInformation](imageio/kcgimagepropertygpsareainformation.md)
- [kCGImagePropertyGPSDifferental](imageio/kcgimagepropertygpsdifferental.md)