North America Portolan Chart
by Library Of Congress, Geography And Map Division/science Photo Library
Title
North America Portolan Chart
Artist
Library Of Congress, Geography And Map Division/science Photo Library
Medium
Photograph - Photograph
Description
North America portolan chart. 16th-century portolan atlas chart showing North America in around 1544. The Gulf of California (centre left), discovered by Ulloa in 1539, is shown with its reddish tint. California is shown as a peninsula, not an island. At centre right, the Yucatan peninsula is shown as an island. Mexico City (in its lake) is at centre), and Peru's mountains are at lower right. The green area at upper right is thought to be an early indication of the Gulf Stream. The portolan rhumb lines and naming of rivers and ports along the coastlines aid navigation. This map was produced by Italian cartographer Battista Agnese (c.1500-1564).
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September 16th, 2018
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