Gauss-Krüger coordinate system
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2007-11-15T13:17:10Z
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Reverted 1 edit by [[Special:Contributions/85.204.149.186|85.204.149.186]]; Removed personal comment. using [[WP:TW|TW]]
In [[cartography]], the term '''Gauss-Krüger''', named after [[Carl Friedrich Gauss]] and [[Johann Heinrich Louis Krüger]], is used in three slightly different ways.
* Often, it is just a synonym for the [[transverse Mercator]] map [[map projection|projection]]. Another synonym is ''Gauss conformal projection''.
* Sometimes, the term is used for a particular computational method for transverse Mercator: that is, how to convert between latitude/longitude and projected coordinates. There is no simple closed formula to do so when the earth is modelled as an ellipsoid. But the ''Gauss-Krüger'' method gives the same results as other methods, at least if you are sufficiently near the central meridian: less than 10 degrees of longitude, say. Farther away, some methods become inaccurate.
* The term is also used for a particular set of Transverse Mercator projections used in narrow zones in Europe and South America, at least in Germany, Austria, Finland and Argentina. This ''Gauss-Krüger'' system is similar to the [[universal transverse Mercator]] system, but the central meridians of the Gauss-Krüger zones are only 3° apart, as opposed to 6° in UTM. As a consequence, the scale variation within a Gauss-Krüger zone is about 1/4 of what it is in a UTM zone. More information on this system can be found on the German Wikipedia.
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[[Category:Geographic coordinate systems]]
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