A map with text showing the four quadrants of the globe that are north or south of the Equator and East or West of the Prime Meridian.

Geographic Coordinate Systems

Caitlin Dempsey

Geographic coordinates are defined as being north or south of the Equator and east or west of the Prime Meridian.

Map showing the ten zones that cover the contiguous United States with the UTM map projection.

How to Calculate the Boundaries of an UTM Zone

Caitlin Dempsey

A UTM coordinate system's eastern and western borders can be easily determined.