| True area | On the old Mercator map | Distortion vs truth |
| Central African Republic | 620,987 km² | 627,197 km² | 1× |
| Greenland | 2,154,754 km² | 25,447,645 km² | 11.8× |
| Africa | 30,370,000 km² | — | 1× |
Old maps drew Central African Republic at about 627,197 km² km². The truth is 620,987 km² km² — a difference of 1%% that school atlases carried for centuries.