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ONLINE EXHIBITS
Browse Exhibits
Browse Exhibits
Rhumb Line Grid detail
A rhumb line grid.
← Vellum post and tie hole detail from the 1466 Roselli
Bibliography →
Detail Images
Rhumb Line Grid detail
Portolan Charts
Introduction to Portolan Charts
What is a Portolan Chart?
1475 Martellus Manuscript
1485 Sonetti Portolan
History - the Carte Pisane
Why are Portolans so Rare?
Elements of a Portolan
Unsolved Mysteries of the Portolans
How Were Copies Made?
How Were Portolans Used?
The Islands: An Ongoing Debates
William H. Babcock's Legendary Islands
Armando Cortesão and Island Names
James E. Kelley and Early Voyages
7 Cities: The Phantom Islands of the Atlantic
Research, the Path to Solving the Mysteries
Technology, the New Research Tool
At the Bell
1424 Nautical Chart
The Grid
Focus of the Chart
Place Names
England, Ireland and Brazil
The Island Debate Revisited
1466 Roselli Portolan Chart
The Mapmaker
Decorations and the Circle
Comparing to Other Charts: The Red Sea
Comparing to Other Charts: Africa
Comparing to Other Charts: England and Scotland
Comparing to Other Charts: The Danube
Comparing to Other Charts: The Atlantic Islands
1489 Canepa Portolan Chart
The Mapmaker
The Size and Shape
Mountains
The Far North
Rivers
Cities
Africa
The Circle
Grid
The Atlantic Islands
Detail Images
Sonetti text detail
Vellum neck detail from the 1466 Roselli
Vellum post and tie hole detail from the 1466 Roselli
Rhumb Line Grid detail
Bibliography
Young Navigators - Activities
Credits
