World Map on Mercator's Projection Americas Explorer tracks 1872 Mitchell mapMap of the World of the Mercator Projection Exhibiting the American Continent As Its Centre. (World Map, Mercator Projection, Polynesia, North America, South America, Africa, Europe, Asia, Australia, Greenland). Issued 1872, Philadelphia by S. A. Mitchell. 19th century engraved map, with original hand color. Mitchell maps of this mid century era were issued with a range of color as well as variant decorative borders. Note the erroneous hook shaped