Cassini projection

Cassini Projection

Cassini projection

to get instant updates about 'Cassini Projection' on your MyPage. Meet other similar minded people. Its Free!


All Updates

The Cassini projection is a map projection described by César-François Cassini de Thury in 1745Flattening the Earth: Two Thousand Years of Map Projections, John P. Snyder, 1993, pp. 74-76, ISBN 0-226-76747-7.. 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:

<math>x = arcsin(cos(phi)sin(lambda)),</math>

<math>y = arctanleft(fracright)</math>

where <math>lambda</math> is the longitude from the central meridian and <math>phi</math> is the latitude. When programming these equations, the inverse tangent function used is actually the atan2 function, with the first argument <math>sin(phi)</math> and the second <math>cos(phi)cos(lambda)</math>.

The use of the Cassini projection has largely been superseded by the Transverse Mercator projection, at least with central mapping agencies.


Things along the central meridian, and at right angles to it, are not distorted. Elsewhere, the distortion is largely in a north-south direction, and varies by the square of the central meridian. As such, the greater the longitudinal extent of the area, the worse the distortion becomes.

Due to this, the Cassini projection works best on long, narrow areas, and worst on wide...
Read More

No feeds found

Posting your question. Please wait!...

No updates available.
No messages found
Suggested Pages
Tell your friends >
about this page
 Create a new Page
for companies, colleges, celebrities or anything you like.Get updates on MyPage.
Create a new Page
 Find your friends
  Find friends on MyPage from