Dictionary:Lambert conic projection

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(lam bār’) A conformal secant (or tangent) conic map in which the Earth’s features are projected radially from the Earth’s center onto a cone that intersects the Earth along two (or one) standard parallels; see Figure M-4. Parallels are thus the arcs of circles and meridians are straight lines and angles are preserved, but the scale varies except along parallels. Lambert projections are used as the standard map references in some states. Lambert coordinates on such a map are rectangular grid coordinates with respect to an arbitrary reference point; they are not oriented precisely north-south (except along the reference meridian) nor east-west. (The Lambert equal-area map is an azimuthal projection.) Named for Johann Heinrich Lambert (1728–1777), German physicist.