I'm creating an events app where users can host events at their place and invite people. I want the list of hosted events to be publicly viewable on a map, designated by some icon. BUT, public event locations will be obfuscated by +1/-1 miles for both latitude and longitude. If you get invited to an event, you'll receive the actual address. This is to protect user's home address.
Seeing as how markers are used to indicate exact location, they seem inappropriate for obfuscated locations. I want users to get a feel of the general area of the event. I was thinking some sort of half transparent, circle figure, whose center is on the obfuscated lat/lng position.
What would be the best shape/icon for representing an "area" on the map?