Alexander von Humboldt
German polymath, geographer, naturalist, & explorer born in 1769.
Percy Fawcett
English geographer, cartographer, archaeologist, & explorer born in 1867.
Gerardus Mercator
Flemish 16th century geographer, cosmographer, & cartographer. Invented the straight line nautical map still used today.
Emmanuel de Martonne
French geographer born in 1873. Participated in the Paris Peace Conference.