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The Littrow projection is a map projection developed by
A Gallery of Map Projections - Azimuthals & RelatedLittrow map
{{Map projections Map projections Conformal projections
The Littrow projection is a map projection developed by Joseph Johann von Littrow
Joseph Johann von Littrow (13 March 1781, Horšovský Týn (german: Bischofteinitz) – 30 November 1840, Vienna) was an Austrian astronomer. In 1837, he was ennobled with the title Joseph Johann Edler von Littrow. He was the father of Karl Ludwi ...
in 1833. It is the only conformal
Conformal may refer to:
* Conformal (software), in ASIC Software
* Conformal coating in electronics
* Conformal cooling channel, in injection or blow moulding
* Conformal field theory in physics, such as:
** Boundary conformal field theory ...
, retroazimuthal map projection. As a retroazimuthal projection, the Littrow shows directions, or azimuths, correctly from any point to the center of the map.
Patrick Weir of the British Merchant Navy independently reinvented the projection in 1890, after which it began to see more frequent use as recognition of its retroazimuthal property spread. Maps based on the Littrow projection are sometimes referred to as Weir Azimuth diagrams.
The projection transforms from latitude ''φ'' and longitude ''λ'' to map coordinates ''x'' and ''y'' via the following equations:
:
where ''R'' is the radius of the globe to be projected and ''λ''0 is the longitude desired for the center point.
See also
*List of map projections
This is a summary of map projections that have articles of their own on Wikipedia or that are otherwise notable
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of being worthy of notice, having fame, or being considered to be of a high degree of interest, signif ...
References
External links
A Gallery of Map Projections - Azimuthals & Related
{{Map projections Map projections Conformal projections