Gall Stereographic projection was created in 1855. The two standard parallels are located at 45° N and 45° S. This projection is used for world maps.
Meridians are straight lines that are equally spaced.
Parallels are straight lines that have increased space with distance from the Equator.
All meridians and parallels are linear.
"Scale is true in all directions along latitudes 45° N and S. Scale is constant along parallels and is symmetrical around the Equator. Distances are compressed between latitudes 45° N and S, and expanded beyond them" (Environmental Systems Research Institute, 1997).
World maps only.