A photo is a representation of someone else's sensory experience.
I can't agree with that definition. A deep sea robot might take a billion photos of a trench - even if nobody looks at them they will still be photographs. If, say, 10 years later I look at those photos they will still not a representation of someone else's sensory experience. They will be a representation of data captured via an electronic sensor. Just like temperature readings from a remote sensor. There is nothing special about the visible part of the EM spectrum.
However, when I do look at them, they will certainly be empirical evidence - I will be experiencing them with my own senses.
I think we have ended up debating how many angels can dance naked in a Robin Thicke video. Evidence is evidence, including photos, and each piece of evidence should be judged on it's own merit, including photos.
Photographs are used daily by law courts, scientists and engineers - taking the position that they are not valid as they don't fit some philosophical position is just silly.
So therefore the OP's photo is empirical proof of the shape of the earth? Is that your position?
You seem to be confusing the terms "proof" and "evidence".
proof
pruːf/
noun
noun: proof; plural noun: proofs
1.
evidence or argument establishing a fact or the truth of a statement.
"you will be asked to give proof of your identity"
synonyms: evidence, verification, corroboration, authentication, confirmation, certification, validation, attestation, demonstration, substantiation, witness, testament;
To annoy the idiots who don't like definitions.