title: Quartic authalic projection
text: # Quartic authalic projection
  
  In cartography, the quartic authalic projection is an equal-area projection developed by Karl Siemon in 1937 and independently by O.S. Adams in 1944. The meridians in this projection are fourth-order polynomial curves. The projection is similar to the sinusoidal projection in appearance and distortion properties.
  
  