Affinio determines a Twitter user's location based on the location field in their bio. The location field is optional and accepts free form entry, meaning that Twitter users can enter a country, city, region, or whatever else they choose.
Here is an example where "Canada" has been entered in the location field:
Similarly, you can enter locations in free form when you are building an Affinio report. Affinio leverages machine learning to understand that specific locations encompass more than one place (e.g., Canada includes Halifax, Nova Scotia, etc.). However, there isn't full global coverage for this feature. If a country is not included in the list below, we would recommend including other location descriptors such as major cities to round out the coverage (e.g., Colombia, Bogotá, Medellín, etc.).
The following locations have been optimized to include their respective cities and regions:
AustraliaBrazil
Canada
China
Europe
Japan
Korea
Malaysia
Mexico
Philippines
Singapore
South Africa
Spain
Thailand
UK
USA
Indonesia
France
Germany
Italy
India
United Arab Emirates
Qatar
Saudi Arabia
Lebanon
Iraq
Oman
Egypt
Israel
Iran
Bahrain
Syria
Turkey
Switzerland