Editing Map projection (section)

===Conformal===
{{Main|Conformal map projection}}
[[File:Usgs map stereographic.PNG|thumb|upright=2|A [[stereographic projection]] is conformal and perspective but not equal area or equidistant.]]
[[Conformal map|Conformal]], or orthomorphic, map projections preserve angles locally, implying that they map infinitesimal circles of constant size anywhere on the Earth to infinitesimal circles of varying sizes on the map. In contrast, mappings that are not conformal distort most such small circles into [[Tissot's indicatrix|ellipses of distortion]]. An important consequence of conformality
is that relative angles at each point of the map are correct, and the local scale (although varying throughout the map) in every direction around any one point is constant. These are some conformal projections:
* [[Mercator projection|Mercator]]: [[Rhumb line]]s are represented by straight segments
* [[Transverse Mercator projection|Transverse Mercator]]
* [[Stereographic projection in cartography|Stereographic]]: Any [[circle of a sphere]], great and small, maps to a circle or straight line.
* [[Roussilhe oblique stereographic projection|Roussilhe]]
* [[Lambert conformal conic projection|Lambert conformal conic]]
* [[Peirce quincuncial projection]]
* [[Adams hemisphere-in-a-square projection]]
* [[Guyou hemisphere-in-a-square projection]]