Bianco world map

This map was a large piece of a nautical atlas including ten pages made of vellum (each measuring 26 × 38 cm).

To confirm his authorship of the atlas, Bianco added to the first page a signature flag with the text "Andreas Biancho de Veneciis me fecit M cccc xxx vj".

The first page, or Tavola 1, shows a diagram of the Raxon or Toleta of Marteloio, a navigational technique that enabled sailors to calculate how to return to their intended course after being blown off-course.

The ninth page contains a circular world map measuring 24 cm in circumference.

The final page illustrates a Ptolemaic world map based upon Ptolemy's first projection with a graduation of the latitudes.