zenithal projection


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zenithal projection

zenithal projection
Zenithal projection.
A projection of the graticule of the reduced earth onto a plane placed tangential to the reduced earth at a point. Depending on whether the point of tangency is the pole or the equator or some other point, they are referred to as a polar, equatorial, or oblique azimuthal projection. These are not true geometrical projections. Also called an azimuthal projection.