There’s nothing wrong with latitude and longitude, but what3words can get in closer. When I entered the latitude and longitude coordinates, 39.770156, -76.058699, one time Google Maps took me to the center of the tree, and another time it went to a spot on the southwest edge of the tree. With what3words, users could be directed to any of 12-15 specific 3 meter squares on the perimeter of the tree.
What3words was used during the lying in state for Queen Elizabeth II, to show people wanting to join the queue just where to go in along the route. Here’s a couple of posts about it from that thread: Breaking - The Queen is unwell (has died): 8 Sep 2022 - #606 by Dewey_Finn
That is really granular. There are like twenty of them just in my house.