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The Italian engraver and publisher, Antonio Salamanca, who collaborated with Antonio Lafreri to create made-to-order composite map books during the mid-16th century, produced this finely engraved world map utilizing the double cordiform projection (heart shaped). Salamanca's engraving was based on a map published in 1538 by the noted Flemish geographer and map publisher, Gerard Mercator. Mercator's original map, which is now very rare, was similar to Oronce Fine's double cordiform world map published in 1531. However, there were several significant differences, particularly in terms of geographic content. Most importantly, on this map, both North and South America were labeled "America" for the first time. In addition, both parts of the New World were unambiguously linked as one land mass and the northern part was no longer attached to Asia. Amazingly, this was only Mercator's second map publication during his long and productive career. In 1569, he published a large wall map on 21 sheets which introduced the map projection that now bears his name. Although the original map utilizing this projection is very rare, the projection was adopted by other contemporary map makers and continued to be used widely throughout the 19th century. Mercator also published numerous maps and several globes and atlases. It was his book of world maps, first published in 1595 one year after his death, that introduced the term "atlas" to the world. Relief shown pictorially. Circa 1550.
The physical item is not available at the Boston Public Library.