Cassini Projection Cassini Projection Summary Cylindrical. Neither equal- area nor conformal. Central meridian, each meridian 90 deg. Other meridians and parallels are complex curves.
Scale is true along central meridian, and along lines perpendicular to central meridian.
Scale is constant but not true along lines parallel to central meridian on spherical form, nearly so for ellipsoid. Used for topographic mapping formerly in England and currently in a few other countries. Devised by C. F. Cassini de Thury in 1745 for the survey of France.