On OpenStreetMap, there’s an emergency=defibrillator object. It can be tagged with information like opening hours (e.g. if it’s inside a location that’s only open certain hours), a description of the location (“at the front desk”), etc.
For example, on the Android/iOS app OsmAnd, you can select ‘Defibrillator’ as a point of interest (POI) Additionally, choosing ‘Healthcare’ POI type will show not just hospitals, clinics, etc., but also AED locations.
Other emergency devices, like emergency phones, are also mappable.
Why YSK: quick access to defibrillators can save lives and significantly improve quality-of-life outcomes. The more complete this data is, the more useful somebody can actually expect it to be in an emergency. Even if the data isn’t queried during the emergency, seeing it on the map could help users know where they are ahead of time.
Dutch people have a ~23% chance of surviving cardiac arrest (out of hospital), thanks in part to well-documented AED coverage, thanks in part to systems like this. The rest the western world sits around 10%.
Good data like this is used for emergency services and civil emergency volunteers.