翻訳と辞書 Words near each other ・ "O" Is for Outlaw ・ "O"-Jung.Ban.Hap. ・ "Ode-to-Napoleon" hexachord ・ "Oh Yeah!" Live ・ "Our Contemporary" regional art exhibition (Leningrad, 1975) ・ "P" Is for Peril ・ "Pimpernel" Smith ・ "Polish death camp" controversy ・ "Pro knigi" ("About books") ・ "Prosopa" Greek Television Awards ・ "Pussy Cats" Starring the Walkmen ・ "Q" Is for Quarry ・ "R" Is for Ricochet ・ "R" The King (2016 film) ・ "Rags" Ragland ・ ! (album) ・ ! (disambiguation) ・ !! ・ !!! ・ !!! (album) ・ !!Destroy-Oh-Boy!! ・ !Action Pact! ・ !Arriba! La Pachanga ・ !Hero ・ !Hero (album) ・ !Kung language ・ !Oka Tokat ・ !PAUS3 ・ !T.O.O.H.! ・ !Women Art Revolution Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク polyconic projection ： ウィキペディア英語版 polyconic projection Polyconic can refer either to a class of map projections or to a specific projection known less ambiguously as the American Polyconic. Polyconic as a class refers to those projections whose parallels are all non-concentric circular arcs, except for a straight equator, and the centers of these circles lie along a central axis. This description applies to projections in equatorial aspect.〔''An Album of Map Projections'' (US Geological Survey Professional Paper 1453), John P. Snyder & Philip M. Voxland, 1989, p. 4.〕 As a specific projection, the American Polyconic is conceptualized as "rolling" a cone tangent to the Earth at all parallels of latitude, instead of a single cone as in a normal conic projection. Each parallel is a circular arc of true scale. The scale is also true on the central meridian of the projection. The projection was in common use by many map-making agencies of the United States from the time of its proposal by Ferdinand Rudolph Hassler in 1825 until the middle of the 20th century.〔''Flattening the Earth: Two Thousand Years of Map Projections'', John P. Snyder, 1993, pp. 117-122, ISBN 0-226-76747-7.〕 The projection is defined by: :$x\; =\; \backslash cot(\backslash varphi)\; \backslash sin((\backslash lambda\; -\; \backslash lambda\_0)\backslash sin(\backslash varphi))\backslash ,$ :$y\; =\; \backslash varphi-\backslash varphi\_0\; +\; \backslash cot(\backslash varphi)\; (1\; -\; \backslash cos((\backslash lambda\; -\; \backslash lambda\_0)\backslash sin(\backslash varphi)))\backslash ,$ where $\backslash lambda$ is the longitude of the point to be projected; $\backslash varphi$ is the latitude of the point to be projected; $\backslash lambda\_0$ is the longitude of the central meridian, and $\backslash varphi\_0$ is the latitude chosen to be the origin at $\backslash lambda\_0$. To avoid division by zero, the formulas above are extended so that if $\backslash varphi\; =\; 0$ then $x\; =\; \backslash lambda\; -\; \backslash lambda\_0$ and $y\; =\; 0$. ==See also== * List of map projections 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「polyconic projection」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.