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  2. Stereographic projection - Wikipedia

    en.wikipedia.org/wiki/Stereographic_projection

    Craters which are circles on the sphere appear circular in this projection, regardless of whether they are close to the pole or the edge of the map. The stereographic is the only projection that maps all circles on a sphere to circles on a plane. This property is valuable in planetary mapping where craters are typical features.

  3. List of map projections - Wikipedia

    en.wikipedia.org/wiki/List_of_map_projections

    Map is infinite in extent with outer hemisphere inflating severely, so it is often used as two hemispheres. Maps all small circles to circles, which is useful for planetary mapping to preserve the shapes of craters. c. 150 BC: Orthographic: Azimuthal Perspective Hipparchos* View from an infinite distance. 1740 Vertical perspective: Azimuthal ...

  4. Peirce quincuncial projection - Wikipedia

    en.wikipedia.org/wiki/Peirce_quincuncial_projection

    The maturation of complex analysis led to general techniques for conformal mapping, where points of a flat surface are handled as numbers on the complex plane.While working at the United States Coast and Geodetic Survey, the American philosopher Charles Sanders Peirce published his projection in 1879, [2] having been inspired by H. A. Schwarz's 1869 conformal transformation of a circle onto a ...

  5. Lists of uniform tilings on the sphere, plane, and hyperbolic ...

    en.wikipedia.org/wiki/Lists_of_uniform_tilings...

    There are different notations for expressing these uniform solutions, Wythoff symbol, Coxeter diagram, and Coxeter's t-notation. Simple tiles are generated by Möbius triangles with whole numbers p,q,r, while Schwarz triangles allow rational numbers p,q,r and allow star polygon faces, and have overlapping elements.

  6. 3D projection - Wikipedia

    en.wikipedia.org/wiki/3D_projection

    If the normal of the viewing plane (the camera direction) is parallel to one of the primary axes (which is the x, y, or z axis), the mathematical transformation is as follows; To project the 3D point , , onto the 2D point , using an orthographic projection parallel to the y axis (where positive y represents forward direction - profile view ...

  7. File:Descartes' circle theorem on the sphere.svg - Wikipedia

    en.wikipedia.org/wiki/File:Descartes'_circle...

    You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.

  8. Conformal map projection - Wikipedia

    en.wikipedia.org/wiki/Conformal_map_projection

    In cartography, a conformal map projection is one in which every angle between two curves that cross each other on Earth (a sphere or an ellipsoid) is preserved in the image of the projection; that is, the projection is a conformal map in the mathematical sense. For example, if two roads cross each other at a 39° angle, their images on a map ...

  9. n-sphere - Wikipedia

    en.wikipedia.org/wiki/N-sphere

    The stereographic projection maps the ⁠ ⁠-sphere onto ⁠ ⁠-space with a single adjoined point at infinity; under the metric thereby defined, {} is a model for the ⁠ ⁠-sphere. In the more general setting of topology , any topological space that is homeomorphic to the unit ⁠ n {\displaystyle n} ⁠ -sphere is called an ⁠ n ...

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