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Area resolution of surveillance.
| Location | Target (number of areas) | Data size (million tweets) |
| Aramaki [15] | Japan (1) | 300 |
| Achrekar [26] | United States (10) | 1.9a |
| Culotta [27] | United States (1) | 0.5 |
| Kanouch [28] | Japan (1) | 300 |
| De Quincy [29] | Europe (1) | 0.14 |
| Doan [30] | United States (1) | 24a |
| Szomszor [31] | Europe (1) | 3 |
aIndicates the number of users in millions.
