Universal Transverse Mercator (UTM)

A system that divides the globe into 60 North-South zones, each measuring six degrees wide in longitude. Zones are numbered consecutively from West to East.

Positions on the globe are given by zone coordinates, then the number of meters East (easting) or West (westing) from the center of the zone, and finally by the number of meters North (northing) or South (southing) from the center of the zone. UTM coordinates for the Golden Gate Bridge are zone 10 S, 545980m E. 4185742m N.