---
title: TrajectoryObservation
framework: vision
role: symbol
role_heading: Structure
path: vision/trajectoryobservation
---

# TrajectoryObservation

An observation that describes a detected trajectory.

## Declaration

```swift
struct TrajectoryObservation
```

## Topics

### Creating an observation

- [init(_:)](vision/trajectoryobservation/init(_:).md)

### Inspecting an observation

- [detectedPoints](vision/trajectoryobservation/detectedpoints.md)
- [projectedPoints](vision/trajectoryobservation/projectedpoints.md)
- [equationCoefficients](vision/trajectoryobservation/equationcoefficients.md)
- [movingAverageRadius](vision/trajectoryobservation/movingaverageradius.md)

## Relationships

### Conforms To

- [Copyable](swift/copyable.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Decodable](swift/decodable.md)
- [Encodable](swift/encodable.md)
- [Equatable](swift/equatable.md)
- [Escapable](swift/escapable.md)
- [Hashable](swift/hashable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)
- [VisionObservation](vision/visionobservation.md)