Arc doesn’t have copies of any of your photos. It merely shows you the photos that exist in your phone’s Photos library that match the timeline item’s date range and location / route.

So the photos shown in the timeline item are the same photos that are equally available to any other app.

The notes within a timeline item are exported as part of the JSON export (and I think also the GPX export, though I can’t quite remember if GPX has a relevant field for notes).

Can you give me an example of an app that you would want to export these rich exports to? It might be better to focus on a specific use case, then see what can be done for that specific case.

My primary use case is DayOne as my end point for all journaling activities, both manual and automated. The most basic export would render the map as image and export the image together with the notes (including all metadata like datetime, position, and if applicable activity type, calories burnt, etc. converted to text).

An example for an app that offers this would be e. g. Sleep Cycle (exports rendered charts together with comment text).

See https://share.icloud.com/photos/0nsuMDrRYMkvvD2eIDesSX7cg

I’m also a Day One ‘s user and would be very interested by such a rich export function.