The Cassini projection is a map projection described by César-François Cassini de Thury in 1745. It is the transverse aspect of the equirectangular projection, in that the globe is first rotated so the central meridian becomes the "equator", and then the normal equirectangular projection is applied. Composing these operations:
where is the longitude from the central meridian and is the latitude. When programming these equations, the inverse tangent function used is actually the atan2 function, with the first argument and the second .
The use of the Cassini projection has largely been superseded by the Transverse Mercator projection, at least with central mapping agencies.
Other articles related to "cassini projection":
... Due to this, the Cassini projection works best on long, narrow areas, and worst on wide areas ...
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