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Goode Homolosine Projection is a map projection method proposed by John Paul Goode, an American geographer in the early 20th century. This projection combines the characteristics of the Mollweide Projection and the Sinusoidal Projection. It is an equal-area projection and can accurately represent the area of regions around the world.

Van der Grinten projection is a world map projection developed by American geographer Alphons J. van der Grinten in 1898. The notable features of this projection are that it can represent the entire earth in a circle and present a visually balanced and elegant world map by depicting the meridians and parallels as curves.

Stereographic projection is a method of projecting points on the surface of the earth or sphere from a certain point (usually a pole) of the sphere onto a plane. This projection method distributes points on the sphere and projects them from a certain point to the projection plane opposite it, and finally presents them in the form of a circular map. This method was invented by ancient Greek mathematicians and is widely used in many fields such as astronomy, crystallography and map making.