Sylvanus’s atlas was never reissued making this sole edition extremely rare. 

Syvlanus’ map uses color to distinguish between major regional names (printed in red), and others in black, using inset type. It has been suggested that the dual-colour printing style is done to mimic contemporary portolan charts, which used black and red to distinguish toponyms of various importance. The text in the book says that it used the maps of navigators to update Ptolemy’s original work, and the influence may also have extended to the aesthetic.

Double-page woodcut map of the world, printed in red and black.

' are among the earliest example of two-colour printing in cartography and include the first cordiform (heart-shaped) world map of its kind. Place names are shown in red and black, a significant technical advancement in rendering details. Derived on a Ptolemaic projection, Sylvanus states that his maps update Ptolemy’s geography with more recent discoveries. The signs of the zodiac are shown on the right with Strabo’s climatic zones listed on the left.

This map was included in Sylvanus’s 1511 Venice edition of the '

', which was groundbreaking in several regards. It was the only edition to add modern updates directly to Ptolemy’s maps, the only edition at the time to print maps on both sides of the leaf, the first edition printed in two colours, and the first Italian edition to use woodblocks.

Sylvanus's Ptolemaic World Map