AuthaGraph Paper Globe Assembly Kit / Marumo PrintingThis AuthaGraph Paper Globe illustrates the world map's structure in three dimensions. The transformation process from a sphere to a regular tetrahedron is reproduced in three dimensions through a two step mapping method. This makes it easier to grasp how the AuthaGraph projection works compared to conventional flat maps. The AuthaGraph world map maintains a rectangular format similar to the Mercator projection, while displaying the areas and shapes