| True area | On the old Mercator map | Distortion vs truth |
|---|
| Kosovo | 10,914 km² | 20,082 km² | 1.8× |
| Greenland | 2,154,754 km² | 25,447,645 km² | 11.8× |
| Africa | 30,370,000 km² | — | 1× |
Old maps drew Kosovo at about 20,082 km² km². The truth is 10,914 km² km² — a difference of 84%% that school atlases carried for centuries.