---
title: urlsBySample
framework: realitykit
role: symbol
role_heading: Instance Property
path: realitykit/photogrammetrysession/poses/urlsbysample
---

# urlsBySample

Mapping from the sample ID to the image URL in the input folder corresponding to that sample ID. This simplifies the visualization of which image in the input folder corresponds to a given computed pose.

## Declaration

```swift
var urlsBySample: [Int : URL] { get }
```

## Discussion

Discussion Note: the dictionary is empty unless a folder of images was used to create this session.  If the session is created from a custom Sequence it is expected that the caller has maintained the map from provided sample ID to original image location.