Your emphasis on clear location reminds me of an incident in Channel Islands Nat'l Park some years ago where a hiker, caught in a storm, called 911 for help. He contacted a Highway Patrol dispatcher who had no clue about the island and thought the locality was the city of Santa Cruz, CA which is a few hundred miles distant.

Eventually things got squared away and a park boat was dispatched to the island on a dark and stormy night. A wet and bedraggled rescue party eventually reached the hiker, who had found a nice snug rock shelter and built a fire. He was in much better shape than his "rescuers."

I think that was the first ever 911 call from the park islands...