Thurston County Sheriff's Office and Northwest Helicopters used a Radial/Distance system based upon the Olympia Airport.
That allowed for a quick departure of the Helicopter but still required the use of a County Road Map of some kind to find the actual address.
On scene coordinator was done by use of Police/Fire Department/EMS radio frequencies.
Helicopter EMS operations have used similar methods throughout the country as well when responding to Scene Calls such as automobile accidents or remote location accident scenes.
The Navy and Air Force used TACAN for generations.....using bearing and distance data.