Problem: Geodetic and Control Surveys: The Lambert Projection

Problem: Geodetic and Control Surveys: The Lambert Projection

Which of the following terms may be correctly applied to the Lambert map projection that is used as the foundation for state plane coordinates in the U.S.?

(A) conformal and conic
(B) azimuthal and equal-area
(C) cylindrical and conformal
(D) conic and sinusoidal

This is problem 17(9-10) from the new second edition of 1001 Solved Surveying problems by Jan Van Sickle. Reprinted with permission from 1001 Solved Surveying Problems by Jan Van Sickle (1997, 728 pp., Professional Publications Inc.). For details on this and other FLS exam-prep books, call 800/426-1178 or visit www.ppi2pass.com .

Answer: A

Conformality is the characteristic of the Lambert projection that preserves the shape of small figures as they are transformed from the ellipsoid to the mapping plane. The Lambert projection is a conic projection; that is, the developable surface employed is imagined to be a cone.