Twitter Location Information
By default Twitter disables location information.
Twitter users can opt in by selecting "Add a location to your Tweets" on their Settings page.
The content of twitter.place.place_type is blank unless they opt in. Further, users choose on a Tweet-by-Tweet basis whether to include place information.
Once users have opted in, they must select a location known to Twitter. Based on the user's selection, Twitter includes additional information such as:
- The type of the location (such as city)
- The country
- The 2-character country code
Note that Twitter performs no verification on this field so users are not forced to enter accurate information. A user in New York City is free to enter Edinburgh, Scotland as their location.