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Equal-area and equidistant projections appear in the National Atlas. Other projections, such as the Miller Cylindrical and the Van der Grinten, are chosen occasionally for convenience, sometimes making use of existing base maps prepared by others. Some projections treat the Earth only as a sphere, others as either ellipsoid or sphere.
A family of map projections that includes as special cases Mollweide projection, Collignon projection, and the various cylindrical equal-area projections. 1932 Wagner VI: Pseudocylindrical Compromise K. H. Wagner: Equivalent to Kavrayskiy VII vertically compressed by a factor of /. c. 1865: Collignon
English: Illustration of the projection surface for a cylindrical map projection with different standard parallels (shown in red) and different aspects. This is a recaptioning of a similar map by CMG Lee. The map is based on Globe_Atlantic.svg, which is a work of the US government.
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 ...
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Therefore, more generally, a map projection is any method of flattening a continuous curved surface onto a plane. [citation needed] The most well-known map projection is the Mercator projection. [7]: 45 This map projection has the property of being conformal. However, it has been criticized throughout the 20th century for enlarging regions ...
The Natural Earth projection is a pseudocylindrical map projection designed by Tom Patterson and introduced in 2008. [1] It is neither conformal nor equal-area , but a compromise between the two. In its original presentation, the projection's origin is described as "The impetus for creating the Natural Earth projection was dissatisfaction with ...
Tobler hyperelliptical projection of the world; α = 0, γ = 1.18314, k = 2.5 The Tobler hyperelliptical projection with Tissot's indicatrix of deformation; α = 0, k = 3. The Tobler hyperelliptical projection is a family of equal-area pseudocylindrical projections that may be used for world maps.