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  2. Tissot's indicatrix - Wikipedia

    en.wikipedia.org/wiki/Tissot's_indicatrix

    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 ...

  3. Tissot - Wikipedia

    en.wikipedia.org/wiki/Tissot

    Tissot was founded in 1853 by Charles-Félicien Tissot and his son Charles-Émile Tissot in the Swiss city of Le Locle, in the Neuchâtel canton of the Jura Mountains area. [2] The father and son team worked as a casemaker (Charles-Félicien Tissot) and watchmaker (Charles-Emile). His son having expressed an interest in watchmaking from a young ...

  4. Orthographic map projection - Wikipedia

    en.wikipedia.org/wiki/Orthographic_map_projection

    The formulas for the spherical orthographic projection are derived using trigonometry.They are written in terms of longitude (λ) and latitude (φ) on the sphere.Define the radius of the sphere R and the center point (and origin) of the projection (λ 0, φ 0).

  5. Nicolas Auguste Tissot - Wikipedia

    en.wikipedia.org/wiki/Nicolas_Auguste_Tissot

    Nicolas Auguste Tissot (French:; March 16, 1824 – July 14, 1907) was a French cartographer, who in 1859 and 1881 published an analysis of the distortion that occurs on map projections. He devised Tissot's indicatrix , or distortion circle, which when plotted on a map will appear as an ellipse whose elongation depends on the amount of ...

  6. Equidistant conic projection - Wikipedia

    en.wikipedia.org/wiki/Equidistant_conic_projection

    The equidistant conic projection with Tissot's indicatrix of deformation. Standard parallels of 15°N and 45°N. The equidistant conic projection is a conic map projection commonly used for maps of small countries as well as for larger regions such as the continental United States that are elongated east-to-west. [1]

  7. Mollweide projection - Wikipedia

    en.wikipedia.org/wiki/Mollweide_projection

    Mollweide projection of the world The Mollweide projection with Tissot's indicatrix of deformation. The Mollweide projection is an equal-area, pseudocylindrical map projection generally used for maps of the world or celestial sphere. It is also known as the Babinet projection, homalographic projection, homolographic projection, and elliptical ...

  8. Eckert IV projection - Wikipedia

    en.wikipedia.org/wiki/Eckert_IV_projection

    Eckert IV projection with Tissot's indicatrices of distortion. The Eckert IV projection is an equal-area pseudocylindrical map projection. The length of the polar lines is half that of the equator, and lines of longitude are semiellipses, or portions of ellipses. It was first described by Max Eckert in 1906 as one of a series of three pairs of ...

  9. Lambert conformal conic projection - Wikipedia

    en.wikipedia.org/wiki/Lambert_conformal_conic...

    The Lambert conformal conic projection with standard parallels at 15°N and 45°N, with Tissot's indicatrix of deformation. Aeronautical chart on Lambert conformal conic projection with standard parallels at 33°N and 45°N.