Google prompts you in Google Maps if you want to upload your picture to Maps.
I sometimes do that for random pictures, even like selfies, which I don't mind popping up there.
I had a popup on my iPhone one day "You were in City Park last weekend, would you like to share those photos?". I stopped allowing google access to my photos after that. A little late though, they had apparently scraped all of my data already.
Wait... You post selfies on Google Maps? The thought never crossed my mind. What would the purpose be? Sorry I'm probably thick...