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In the book, Tissot argued for his method, reportedly demonstrating that "whatever the system of transformation, there is at each point on the spherical surface at least one pair of orthogonal directions which will also be orthogonal on the projection." [5] Tissot employed a graphical device he called the ellipse indicatrice or distortion ...
The Behrmann projection with Tissot's indicatrices The Mercator projection with Tissot's indicatrices. In cartography, a Tissot's indicatrix (Tissot indicatrix, Tissot's ellipse, Tissot ellipse, ellipse of distortion) (plural: "Tissot's indicatrices") is a mathematical contrivance presented by French mathematician Nicolas Auguste Tissot in 1859 and 1871 in order to characterize local ...
Stereographic projection of the world north of 30°S. 15° graticule. The stereographic projection with Tissot's indicatrix of deformation.. The stereographic projection, also known as the planisphere projection or the azimuthal conformal projection, is a conformal map projection whose use dates back to antiquity.
Tissot's indicatrices on the Mercator projection. The classic way of showing the distortion inherent in a projection is to use Tissot's indicatrix. Nicolas Tissot noted that the scale factors at a point on a map projection, specified by the numbers h and k, define an ellipse at that point. For cylindrical projections, the axes of the ellipse ...
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Attribution and Share-Alike required; Any use of this map can be made as long as you credit me (Eric Gaba – Wikimedia Commons user: Sting) as the author and distribute the copies and derivative works under the same license(s) that the one(s) stated below.
English: Map of the world in a Behrmann cylindrical equal-area projection with Tissot's Indicatrices of deformation. Each red ellipse has a radius of 500 km. Français : Carte du monde suivant une projection cylindrique équivalente de Behrmann avec indicatrices de déformation de Tissot .