The Enigma Of The Origin Of Portolan Charts
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The Enigma of the Origin of Portolan Charts
The sudden appearance of portolan charts, realistic nautical charts of the Mediterranean and Black Sea, at the end of the thirteenth century is one of the most significant occurrences in the history of cartography. Using geodetic and statistical analysis techniques these charts are shown to be mosaics of partial charts that are considerably more accurate than has been assumed. Their accuracy exceeds medieval mapping capabilities. These sub-charts show a remarkably good agreement with the Mercator map projection. It is demonstrated that this map projection can only have been an intentional feature of the charts’ construction. Through geodetic analysis the author eliminates the possibility that the charts are original products of a medieval Mediterranean nautical culture, which until now they have been widely believed to be.
Gold: How it Shaped History
Gold is not what we think. It is usually discussed in the context of wealth and art but this book has a broader subject, so fundamental that it has been largely unremarked. Informed by a mass of recent discoveries and a South American indigenous perspective, it offers a new way of understanding the history of civilization. Gold has been coinage, treasure and adornment. But it has been much more, as the hidden driver of wars and revolutions, the rise and fall of empires and the transformation of societies. As the sun traveled east to west across the sky, gold, incorruptible and corrupting, flowed west to east, hand to hand across the world. That flow has brought empires to grow and collapse and driven plunder, conquest and colonization. It brought about wars and revolutions, empowered new forms of arts and science and created the capitalist consumer economy that dominates us now. All the gold people ever shaped still exists, shining as new; it can be mislaid but never decays. Right from its first appearance on the west shore of the Black Sea, long before the rise of Egypt and Mesopotamia, gold crowned the first proto-king. Ever since, it has been regarded as value incarnate with transcendental power. The quantity we take has been increasing steadily for 6,500 years. Now extraction accelerates. Our gold mountain has doubled in the last fifty years. Yet its price increases faster. While the quantity doubled, its buying power multiplied by six. What does gold do that makes us want it so much? As Alan Ereira reveals in this skilfully woven narrative, gold is the hidden actor that shapes our story.
The Golden Age of Data Visualization
We are living in the Golden Age of Data Visualization. The COVID-19 pandemic has demonstrated how we increasingly use data visualizations to make sense of the world. Business analysts fill their presentations with charts, journalists use infographics to engage their readers, we rely on the dials and gauges on our household appliances, and we use mapping apps on our smartphones to find our way. This book explains how and why this has happened. It details the evolution of information graphics, the kinds of graphics at the core of data visualization—maps, diagrams, charts, scientific and medical images—from prehistory to the present day. It explains how the cultural context, production and presentation technologies, and data availability have shaped the history of data visualization. It considers the perceptual and cognitive reasons why data visualization is so effective and explores the little-known world of tactile graphics—raised-line drawings used by people who are blind. The book also investigates the way visualization has shaped our modern world. The European Renaissance and the Scientific Revolution relied on maps and technical and scientific drawings, and graphics influence how we think about abstract concepts like time and social connection. This book is written for data visualization researchers and professionals and anyone interested in data visualization and the way we use graphics to understand and think about the world.