cartography

cartograph /kahr"teuh graf', -grahf'/, n.cartographer, n.cartographic /kahr'teuh graf"ik/, cartographical, adj.cartographically, adv.
/kahr tog"reuh fee/, n.
the production of maps, including construction of projections, design, compilation, drafting, and reproduction.
[1855-60; < L c(h)art(a) CARTE + -O- + -GRAPHY]

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Art and science of representing a geographic area graphically, usually by means of a map or chart.

Political, cultural, or other nongeographic features may be superimposed. Ptolemy's eight-volume Geography showed a flat, disc-shaped projection of part of the Earth. Medieval European maps followed Ptolemy's guide but placed east at the top of the map. In the 14th century more-accurate maps were developed for use in navigation. The first surviving globe dates from 1492. Discovery of the New World led to new techniques in cartography, notably projection of a curved surface onto a flat surface. In particular, Gerardus Mercator projected landmasses onto a cylinder wrapped around the Earth's Equator. Such cylindrical projections maintain proper directions or bearings, though they cause distortions in distances at high latitudes. Contour maps show relief by connecting points of equal elevation with lines, mean sea level being the reference point. Modern cartography uses aerial photography and satellite radar for a degree of accuracy previously unattainable. Satellites have also made possible the mapping of features of the Moon and of several planets and their moons. See also geographic information system; global positioning system.

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 the art and science of graphically representing a geographical area, usually on a flat surface such as a map or chart; it may involve the superimposition of political, cultural, or other nongeographical divisions onto the representation of a geographical area.

      A brief treatment of cartography follows. For full treatment, see map.

 Cartography is an ancient discipline that dates from the prehistoric depiction of hunting and fishing territories. The Babylonians mapped the world in a flattened, disk-shaped form, but Ptolemy established the basis for subsequent efforts in the 2nd century AD with an eight-volume work on geography that showed a spherical Earth. Maps produced during the Middle Ages followed Ptolemy's guide, but they used Jerusalem as the central feature and placed East at the top. These representations are often called T-maps because they show only three continents (Europe, Asia, and Africa), separated by the “T” formed by the Mediterranean Sea and the Nile River. More accurate geographical representation began in the 14th century when portolan (seamen's) charts were compiled for navigation.

 The discovery of the New World led to the need for new techniques in cartography, particularly for the systematic representation on a flat surface of the features of a curved surface (see projection; Mercator projection). The 17th and 18th centuries saw a vast outpouring of printed maps of ever-increasing accuracy and sophistication. Noteworthy among the scientific methods introduced later was the use of the telescope for determining the length of a degree of longitude. Modern cartography largely involves the use of aerial photographs as a base for any desired map or chart; the procedures for translating photographic data into maps are governed by the principles of photogrammetry and yield a degree of accuracy previously unattainable. Satellite photography has made possible the mapping of features of the Moon and of several planets and their satellites.
 

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Universalium. 2010.

Look at other dictionaries:

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