| True area | On the old Mercator map | Distortion vs truth |
|---|
| Portugal | 90,766 km² | 152,487 km² | 1.7× |
| Greenland | 2,154,754 km² | 25,447,645 km² | 11.8× |
| Africa | 30,370,000 km² | — | 1× |
Old maps drew Portugal at about 152,487 km² km². The truth is 90,766 km² km² — a difference of 68%% that school atlases carried for centuries.