Determining the location of the user of social networks (except for the questionnaire)?

Question

Social media

Good people, tell me where to start studying materials on determining the geolocation of social network users?
Exception:
- according to the user profile.

Answer 1

If you are not the owner of the network with access to the data, then forget it.

Answer 2

It is possible by geo photos.
By groups (If groups of any territory predominate, most likely the user is from there).
See what other data is available to you and consider how it can be associated with the user's location.