Universal polar stereographic coordinate system

The Universal Polar Stereographic projection is a conformal and stereographic projection, which is used in the UTM coordinate system for the representation of the polar regions. On the one hand it is to excessive distortions in the vicinity of the North and South Pole Prevent, other, to avoid the " dismemberment " in several strips of UTM projection cylinder.

The poles are each projected on a circle. It is oriented in a Cartesian coordinate system so that the center point is at the coordinates ( 2,000,000 m / 2000000 m). In the UTM system is established that for the North Pole the latitudes 84 ° N is used to 90 ° N for the UPS projection and for the South Pole the latitudes 80 ° S to 90 ° S. From this difference of four degrees, therefore, that the circular projections have a different radius.