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Portal:Atlas

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The Atlas Portal

Political and physical world map from the end of 2005

An atlas is a collection of maps, traditionally bound into book form, but now found in multimedia formats. As well as geographic features and political boundaries, many often feature geopolitical, social, religious and economic statistics.

The first book that could be called an atlas was constructed from the calculations of Claudius Ptolemy, a Greek geographer working in Alexandria circa A.D. 150. The first edition was published in Bologna in 1477 and was illustrated with a set of 27 maps, though scholars say that it is not known whether the printed maps were engraved versions of original maps made by Ptolemy, or whether they were constructed by medieval Greek scholars from Ptolemy's text.

Atlas of Greek mythology

The origin of the term atlas is a common source of misconception, perhaps because two different mythical figures named 'Atlas' are associated with mapmaking. King Atlas, a mythical King of Mauretania, was, according to legend, a wise philosopher, mathematician and astronomer who supposedly made the first celestial globe. However, the more widely known Atlas is a figure from Greek mythology.

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Iberian Peninsula map
Credit: Robert Wilkinson
18th century hand-coloured engraved map of the Iberian peninsula depicting various topographical features of the land, as published in Robert Wilkinson's General Atlas, circa 1794.

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A compass rose

A compass rose is a figure displaying the orientation of the cardinal directions, north, south, east and west on a map or nautical chart. It is also the term for the graduated markings found on the traditional magnetic compass. Today the use and idea of a compass rose is found on or featured in almost all navigation systems, including nautical charts, NDB and VOR systems, some GPS sets and similar.

The "rose" term arises from the fairly ornate figures used with early compasses. A fleur-de-lis figure, evolved from the initial T in the north wind's name Tramontane, is sometimes used to indicate the north direction.

Early roses were depicted with 12 points at 30° each, as was favored by the Romans. In the Middle Ages map makers moved to the 16-point rose complaining that sailors did not have the education to understand the previous design. The earliest 32-point compass rose was developed by Arab navigators during the Middle Ages.

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World map from Ortelius' Theatrum Orbis Terrarum

Abraham Ortelius (April 2, 1527June 28, 1598) was a cartographer and geographer, generally recognized as the creator of the first modern atlas. He was born in Antwerp in what is now Belgium, a member of the influential Ortelius family of Augsburg.

Beginning as a map-engraver, in 1547 he entered the Antwerp guild of St Luke as afsetter van Karten. His early career is that of a businessman, and most of his journeys before 1560 are for commercial purposes. In 1560, however, when travelling with Mercator to Trier, Lorraine and Poitiers, he seems to have been attracted, largely by Mercator’s influence, towards the career of a scientific geographer; in particular he now devoted himself, at his friend’s suggestion, to the compilation of that atlas, or Theatrum Orbis Terrarum (Theatre of the World), by which he became famous.

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The map is not the territory ... The only usefulness of a map depends on similarity of structure between the empirical world and the map...

Alfred Korzybski

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