Add panoramax=* universal field

[mnalis]

Description, Motivation & Context

This PR adds panoramax=* universal field which contains UUID of the photo in Panoramax.

Panoramax is FOSS decentralized federated map of geolocated street-level pictures. Its function is similar to Facebook's Mapillary (which has universal mapillary=* already in id-tagging-schema) or Google StreetView, but with emphasis on being fully open-source stack and allowing decentralization.

(i.e. Panoramax is alternative to Mapillary/GoogleStreetView in much the same way as Mastodon is alternative to Twitter/X, thus more aligned with OpenStreetMap premises).

Related issues

Closes #1334

Links and data

Relevant OSM Wiki links:

• https://wiki.openstreetmap.org/wiki/Key:panoramax
• https://wiki.openstreetmap.org/wiki/Panoramax

Relevant tag usage stats:

Current usage (as of the creating this PR) is 1583 uses, and taginfo shows a fast growing curve.

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[github-actions]

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[mnalis]

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Tested, and seems to work fine! (i.e. I can search for panoramax in iD and that tag, and clicking on its external view opens up Panoramax map with the specified image; also info button works fine and leads to appropriate wiki)

[Coehill]

@mnalis You rock! :D

[tordans]

I wonder if we should take this opportunity and look into how we can improve the Usability for those fields…

• Should we maybe group the in their label as both "Street level imagery"? Eg ""Street level imagery: Panoramax"
• Is "reference code" a good term, when we use ID or Key elsewhere? Maybe "Identifier (ID / Key)?
• Do both wiki pages do a good job to explain how to retrieve this key to be added to this field? Eg. a user in iD that does not know this already, how would she learn how to get from iD to the key?
• Double check if the wiki pages are clear on only one key per image (no Semicolon usage, right?)

Mapillary: Wiki, Wikidata item
Panoramax: Wiki, Wikidata item

---

On the general question of when / if to merge this: I don't see a reason why not other than other image street level image services are out there and they did not ask, yet. — But given this is a global key, I would like to wait for a +1 from another co-maintainer.

[Coehill]

I wonder if we should take this opportunity and look into how we can improve the Usability for those fields…

* Should we maybe group the in their label as both "Street level imagery"? Eg ""Street level imagery: Panoramax"

* Is "reference code" a good term, when we use ID or Key elsewhere? Maybe "Identifier (ID / Key)?

* Do both wiki pages do a good job to explain how to retrieve this key to be added to this field? Eg. a user in iD that does not know this already, how would she learn how to get from iD to the key?

* Double check if the wiki pages are clear on only one key per image (no Semicolon usage, right?)

Mapillary: Wiki, Wikidata item Panoramax: Wiki, Wikidata item

On the general question of when / if to merge this: I don't see a reason why not other than other image street level image services are out there and they did not ask, yet. — But given this is a global key, I would like to wait for a +1 from another co-maintainer.

I like the idea of street_level_imagery:panoramax=id since it's clearer and self-documenting.

Imo, "picture identifier" is ideal since it reflects the Panoramax UI:
I have updated the wiki accordingly.

I have also updated the wiki with instructions on how to retrieve the picture identifier in Panoramax.

@PanierAvide can you please comment on whether it is expected for panoramax=* to only store one picture ID with no semicolon usage? My guess is yes. If so, we can add the line to the wiki: "Each image only has one picture identifier, so panoramax=* may only contain one UUID value. Multiple values are not permitted."

[PanierAvide]

My two cents on the topic :

• We already expect any OSM tag for Panoramax ID to have potentially many values separated by semicolon (as well as having suffixed tags like panoramax:front=*).
• Grouping in terms of UI all street-level providers in iD seems good, but having an OSM tag like street_level_imagery:panoramax=* seem over-engineered, regarding history of contact:*=* and so on.