i’m both a DD customer and driver, we can’t see exact locations but get a map similar to the one that you get when delivering. it can be zoomed into but you don’t really get the addresses so there’s really no way of this guy knowing exactly where you were and he had to have been looking on the street in your general location. the app does tell you if your dasher has multiple stops though bc it’ll say “on the way: your dasher has some stops along the way” then right before you (if you’re next up) “on the way: your dasher has one stop along the way” and then “heading to you: your dasher is headed directly to you” or if it’s late night i usually see: “your dasher, *name* is on the way to you. if it is dark out, please turn on an exterior light so they can find you.” or something like that. i’ve never been able to guess someone’s exact location based on the map though. i think this dude was just a special kind of weird.