[Someone]

https://en.wikipedia.org/wiki/Advanced_Mobile_Location#Histo...:

”AML was developed in the United Kingdom by British Telecom, EE Limited, and HTC as a solution to problematic caller location in emergencies. When a person in distress calls the emergency services with a smart-phone where AML is enabled, the telephone automatically activates its location service to establish its position and sends this information to the emergency services via an SMS.[3] The services uses either a global navigation satellite system or WiFi depending on which one is better at the given moment”

This works, will shortly be required in the EU, but requires changes to your phone’s software and a change in the law (implicitly sharing your location is a privacy invasion)

It also still may be less accurate than you putting a marker on the map (but then, how good are people in distress in placing such a marker?)