indicatrix ellipsoid

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• indicatrix — noun An ellipsoid whose three axes represent the refractive indices of an anisotropic crystal for light following different directions with respect to the crystal axes …   Wiktionary

• indicatrix — |ində̇|kā.triks, ə̇nˈdikə.(ˌ)t noun ( es) Etymology: New Latin, feminine of Late Latin indicator more at trix : an ellipsoid whose axes are proportional to the principal refractive indices of a crystal and from which various optical properties of …   Useful english dictionary

• Tissot's Indicatrix — Tissot’s indicatrix, or ellipse of distortion, is a concept developed by French mathematician Nicolas Auguste Tissot, in 1859 and 1871, to measure and illustrate distortions due to map projection. It is the theoretical figure that results from… …   Wikipedia

• Index ellipsoid — In optics, an index ellipsoid is a diagram of an ellipsoid that depicts the orientation and relative magnitude of refractive indices in a crystal. The equation for the ellipsoid is constructed using the electric displacement vector D and the… …   Wikipedia

• Scale (map) — The scale of a map is defined as the ratio of a distance on the map to the corresponding distance on the ground. If the region of the map is small enough for the curvature of the Earth to be neglected, then the scale may be taken as a constant… …   Wikipedia

• Map projection — A medieval depiction of the Ecumene (1482, Johannes Schnitzer, engraver), constructed after the coordinates in Ptolemy s Geography and using his second map projection A map projection is any method of representing the surface of a sphere or other …   Wikipedia

• Kartenprojektion — Kartenprojektion, die Abbildung des Liniensystems der Meridiane und Parallelkreise, welche die mathematische Erdoberfläche überziehen, auf einer ebenen Zeichenfläche, dem Kartenblatte. Da eine gekrümmte Fläche sich nicht ohne Verzerrung in einer… …   Lexikon der gesamten Technik