I hate that I lack the technical chops to adopt ideas like this. I really hope you keep it in the "just in case there's an opportunity" corner of your thinking parts. It's a spectacular idea.
oh, well...i would have to get others to build out the (components of the) thing. Maybe if i was hard pressed i'd figure it out eventually (especially these days with AI, but i will just never admit to it :P ). It was however my job for more than 4 years to architect stuff like this, design the sensors/edge hardware and come up with roll-out/deployment at scale.
Doing the musig2 thing would involve a fair bit of complexity; the dumb way of doing things would be to have the landmark just kind6/repost events you give it, and then hands you that event back for broadcasting. It would make feeds straightforward in any client (because you can just do npub based indexing instead of tag based).
The reason i prefer musig2 is because then the location is baked into the identity of the event, instead of it being a separate attestation; there is no ambiguity about the fact that the event is tied to the landmark/location, which ultimately make it cleaner in the long run; i.e. in the kind6/repost scenario, if you actually wanted to verify if an event was tied to that location, you'd have to perform a bunch of steps that byfar most clients actually would not know how to do or make sense of it.
The lack of ambiguity is not just technical. Because the npub that signed the event is ''you at that location'', it can have its own kind0, that by default would carry the name ''[your name] at [landmark name]'', and its own profile picture, that could be a selfy of you infront of the landmark, and a bio ''these are my crack fuel poems about how this women broke my heart in front of this statue'' etc. Thus resulting into something a human can immediately contextualize/understand,regardless of formal verification (and one would hope interpreting musig signatures becomes a generally adopted generic standard anyway among clients).
It also makes more poetic sense to me that identity of the landmark as such does not exist really, but is only expressed directly in relation with the human in front of it. A kind6/repost would mean ''the landmark was witness'' as if the landmark itself is an identity....but without humans the landmark is meaningless, so the actual identity of the landmark is the collection of relationships humans have with the landmark.
Doing the musig2 thing would involve a fair bit of complexity; the dumb way of doing things would be to have the landmark just kind6/repost events you give it, and then hands you that event back for broadcasting. It would make feeds straightforward in any client (because you can just do npub based indexing instead of tag based).
The reason i prefer musig2 is because then the location is baked into the identity of the event, instead of it being a separate attestation; there is no ambiguity about the fact that the event is tied to the landmark/location, which ultimately make it cleaner in the long run; i.e. in the kind6/repost scenario, if you actually wanted to verify if an event was tied to that location, you'd have to perform a bunch of steps that byfar most clients actually would not know how to do or make sense of it.
The lack of ambiguity is not just technical. Because the npub that signed the event is ''you at that location'', it can have its own kind0, that by default would carry the name ''[your name] at [landmark name]'', and its own profile picture, that could be a selfy of you infront of the landmark, and a bio ''these are my crack fuel poems about how this women broke my heart in front of this statue'' etc. Thus resulting into something a human can immediately contextualize/understand,regardless of formal verification (and one would hope interpreting musig signatures becomes a generally adopted generic standard anyway among clients).
It also makes more poetic sense to me that identity of the landmark as such does not exist really, but is only expressed directly in relation with the human in front of it. A kind6/repost would mean ''the landmark was witness'' as if the landmark itself is an identity....but without humans the landmark is meaningless, so the actual identity of the landmark is the collection of relationships humans have with the landmark.