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Definition of Map projection

Map projection Definition from Business & Finance Dictionaries & Glossaries
Sean_Woo's Finance,GIS & Real Estate Glossary
see Cartesian
Map projection Definition from Science & Technology Dictionaries & Glossaries
Glossary of Cartographic Terms
Orderly system of lines on a plane representing a corresponding system of imaginary lines on an adopted terrestrial or celestial datum surface. Also, the mathematical concept for such a system. For maps of the Earth, a projection consists of 1) a graticule of lines representing parallels of latitude and meridians of longitude or 2) a grid.
See: map, projection
Map projection Definition from Encyclopedia Dictionaries & Glossaries
English Wikipedia - The Free Encyclopedia
Commonly, a map projection is a systematic transformation of the latitudes and longitudes of locations on the surface of a sphere or an ellipsoid into locations on a plane. Map projections are necessary for creating maps. All map projections distort the surface in some fashion. Depending on the purpose of the map, some distortions are acceptable and others are not; therefore, different map projections exist in order to preserve some properties of the sphere-like body at the expense of other properties. There is no limit to the number of possible map projections.

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Map projection Definition from Society & Culture Dictionaries & Glossaries
Outdoor Glossary
the process of transforming a round object (the earth) into a flat object (a map) with the least amount of distortion. There is always some distortion caused in this process which is why grid lines are not perfectly parallel.
Map projection Definition from Language, Idioms & Slang Dictionaries & Glossaries
WordNet 2.0

1. a projection of the globe onto a flat map using a grid of lines of latitude and longitude
(hypernym) projection
(hyponym) conformal projection, orthomorphic projection