Sinusoidal projection
![Jean Cossin, Carte cosmographique ou Universelle description du monde, Dieppe, 1570](/Images/godic/202502/11/Carte_cosmographique_ou_Universelle_description_du_monde,_Jean_Cossin,_Dieppe,_15702500.png")
![Sinusoidal projection of the world.](/Images/godic/202502/11/Sinusoidal_projection_SW2500.jpg")
![The sinusoidal projection with Tissot's indicatrix of deformation](/Images/godic/202502/11/Tissot_indicatrix_world_map_sinusoidal_proj.svg2500.png")
![A sinusoidal projection shows relative sizes accurately, but distorts shapes and directions. Distortion can be reduced by](/Images/godic/202502/11/Usgs_map_sinousidal_equal_area2500.PNG")
The sinusoidal projection is a pseudocylindrical equal-area map projection, sometimes called the Sanson–Flamsteed or the Mercator equal-area projection. Jean Cossin of Dieppe was one of the first mapmakers to use the sinusoidal, appearing in a world map of 1570. The projection is defined by: