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Quartic authalic projection
Pseudocylindrical equal-area map projection From Wikipedia, the free encyclopedia
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In cartography, the quartic authalic projection is an equal-area projection developed by Karl Siemon in 1937 and independently by Oscar S. Adams in 1944.[1] The meridians in this projection are fourth-order polynomial curves.[2] The projection is similar to the sinusoidal projection in appearance and distortion properties.
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