AuthaGraph projection

AuthaGraph is an approximately equal-area world map projection invented by Japanese architect Hajime Narukawa[1] in 1999.

[2] The map is made by equally dividing a spherical surface into 96 triangles, transferring it to a tetrahedron while maintaining area proportions, and unfolding it in the form of a rectangle: it is a polyhedral map projection.

The AuthaGraph world map can be tiled in any direction without visible seams.

From this map-tiling, a new world map with triangular, rectangular or a parallelogram's outline can be framed with various regions at its center.

This tessellation allows for depicting temporal themes, such as a satellite's long-term movement around the Earth in a continuous line.