Portal:Atlas
The Atlas Portal An atlas is a collection of maps, traditionally bound into book form, but now most often found in multimedia formats. As well as geographic features and political boundaries, many often feature geopolitical, social, religious and economic statistics. The first known 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. More about Atlases...
Featured map Selected article A geographic coordinate system enables every location on the Earth to be specified in three coordinates, using mainly a spherical coordinate system. The Earth is not a sphere, but an irregular shape approximating an ellipsoid; the challenge is to define a coordinate system that can accurately state each topographical feature as an unambiguous set of numbers. Latitude is the angle from a point on the Earth's surface and the equatorial plane, measured from the centre of the sphere. The north pole is 90° N; the south pole is 90° S. The 0° parallel of latitude is designated the equator. The equator is the fundamental plane of all geographic coordinate systems. The equator divides the globe into Northern and Southern Hemispheres. Longitude is the angle east or west of a reference meridian between the two geographical poles to another meridian that passes through an arbitrary point. All meridians are halves of great circles, and are not parallel. They converge at the north and south poles. Related portalsSelected biography Erhard Etzlaub, was an astronomer, geodesist, cartographer, instrument maker and physician. From letters from a third party dated 1500 and 1507, we learn that he was a well-known instrument ("compass") maker and a geodesist, and from a letter dated 1517, that "he had also practicised as a physician for at least four years". His death is noted in as the 15th entry in an official list of 20 people buried between December 20, 1531 and February 21, 1532. On occasion of the Holy Year 1500, when many pilgrims were expected to go to Rome, he designed his famous "Rom-Weg" map, a 41 x 29 cm wood engraving in stereographic projection of app. scale 1:5,6 mio., the earliest printed road map of central Europe. It is, as all of Etzlaub's maps, "South-up". Distances between cities can be computed by dotted lines, where a one-dot-step means one German Mile (7400m). If the prints were coloured, they show political regions, too. Related WikiProjectsSelected quote
TopicsAtlas - Geography - Topography Cartography: Cartographers - History of cartography - Ancient world maps - World maps - Compass rose - Generalization - Geographic coordinate system - Relief depiction - Scale - Terra incognita - Planetary cartography Map projection: Azimuthal equidistant - "Butterfly" - Dymaxion - Gall–Peters - General Perspective - Goode homolosine - Mercator - Mollweide - Orthographic - Peirce quincuncial - Robinson - Sinusoidal - Stereographic Maps: Cartogram - Estate map - Geologic map - Linguistic map - Nautical chart - Pictorial map - Reversed map - Road atlas - Thematic map - Topographic map - Weather map - Web mapping - World map Things you can do
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