The first part of an MGRS coordinate is the grid-zone designation. The 6° wide UTM zones, numbered 1–60, are intersected by latitude bands that … See more

The third part of an MGRS coordinate is the numerical location within a 100,000 meter square, given as n + n digits, where n is 1, 2, 3, 4, or 5. If … See more

The boundaries of the latitude bands are parallel circles (dashed black lines in figure 1), which do not coincide with the boundaries of the 100,000-meter squares (blue lines in figure … See more

There are other geographic naming systems of this alphanumeric kind:
• Global Area Reference System (GARS) has been adopted by the National Geospatial-Intelligence Agency for use across the Department of Defense for certain … See more

The second part of an MGRS coordinate is the 100,000-meter square identification. Each UTM zone is divided into 100,000 meter squares, so that their corners have UTM-coordinates that are multiples of 100,000 meters. The identification consists of a column letter … See more

In the polar regions, a different convention is used. South of 80°S, UPS South (Universal Polar Stereographic) is used instead of a UTM projection. The west half-circle forms a … See more

• A list of coordinate systems – by Prof. Peter H. Dana at the Univ. of Colorado
• Grids and Reference Systems, by NGA.
• Army Study Guide: Locate a point using the US Army Military Grid Reference System (MGRS) See more