Welcome to the MedLibrary.org Wikipedia Supplement on Portal:Atlas -- Please Click to Return to Front Page

The Atlas Portal

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.

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.

Featured map

Selected article

A map projection is any method used in cartography to represent the two-dimensional curved surface of the earth or other body on a plane. The term "projection" here refers to any function defined on the earth's surface and with values on the plane, and not necessarily a geometric projection.

Flat maps could not exist without map projections, because a sphere cannot be laid flat over a plane without distortions. One can see this mathematically as a consequence of Gauss's Theorema Egregium. Flat maps can be more useful than globes in many situations: they are more compact and easier to store; they readily accommodate an enormous range of scales; they are viewed easily on computer displays; they can facilitate measuring properties of the terrain being mapped; they can show larger portions of the earth's surface at once; and they are cheaper to produce and transport. These useful traits of flat maps motivate the development of map projections.

Related portals

Selected biography

Captain George Comer (April 1858 – 1937) was considered the most famous American whaling captain of Hudson Bay, and the world's foremost authority on Hudson Bay Inuit in the early 20th century.

Comer was a polar explorer, whaler/sealer, ethnologist, cartographer, author, and photographer. He made 14 Arctic and three Antarctic voyages in his lifetime. These expeditions (ca. 1875-1919) commonly began in New London, Connecticut or New Bedford, Massachusetts. Comer's circle of friends and colleagues included other notable explorers of the time, such as Robert Peary and Capt. Frederick Cook, and his mentor, Franz Boas, the "Father of American Anthropology".

Related WikiProjects

Topics

Things you can do

Related categories

Associated Wikimedia