| True area | On the old Mercator map | Distortion vs truth |
|---|
| Sudan | 1,863,027 km² | 2,012,069 km² | 1.1× |
| Greenland | 2,154,754 km² | 25,447,645 km² | 11.8× |
| Africa | 30,370,000 km² | — | 1× |
Old maps drew Sudan at about 2,012,069 km² km². The truth is 1,863,027 km² km² — a difference of 8%% that school atlases carried for centuries.