Input: geolocation
Output: account, patterns of activity
Types: behavioural, technical
Weakness: SOWEL-16. Appearing In Local Sources
Some social media (e.g. Telegram) allow you to view users who may be near your device, indicating the radius in which they are located. By substituting the geolocation of your own device, you can get a list of users within the radius of a given point on the map.