(geometry) The projection onto an n − 1 dimensional hyperplane (which is extended so as to be projective) of a set of n + 1 affinely independent n-dimensional points (called an affine frame).

plural of astral projection

plural of projective plane

plural of pilot project

(cartography) A map projection that is conformal and retroazimuthal.

plural of Bottomley projection

plural of back projection

A kind of pseudoconical equal-area map projection.

A kind of equal-area map projection, intended as an alternative to the Bonne projection that would reduce the extent of extreme distortion at the edges and give a more satisfying overall shape.

A pseudoconic cordiform equal-area map projection that is a limiting form of the Bonne projection, having its standard parallel at one of the poles (90°N/S).