Let’s say you have multiple people who want to share their location with each other, but to different degrees of precision. Some people might be willing to share their street address, while others only want to share the city that they live in. Some only want to say “Northern New Jersey”, or “Southern France”. Some might want to just share their timezone.

How do you store this information in a database, in a geographically meaningful way? How do you represent it on a map?