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Universal Transverse Mercator (UTM)


UTM to Latitude and Longitude

Zone N/S Easting Northing Datum

Example:
  12N 384323 5540791


Latitude and Longitude to UTM

GPS Location
Latitude Longitude

Example:
Latitude 50.00820   Longitude 112.61440

Latitude   Longitude
Degree Minute Second N/S   Degree Minute Second E/W
 

Examples:
50° 00' 29" N   112° 36' 51" W
50° 00.49' N   112° 36.86' W


World Map with UTM Grid

World map of UTM Grid Zones

Universal Transverse Mercator

Universal Transverse Mercator (UTM) is a coordinate system that maps the Earth's three dimensional "round" surface to a relatively accurate "flat" two dimensional surface.

UTM does this by dividing the Earth into "small" squares.

These squares are 6 degree wide "Zones" of longitude and 8 degrees tall "Bands" of latitude. Band 'X' is 12 degrees tall.

Zones are numbered 1 to 60, run left to right, west to east and correspond to the 'X axis' on a cartesian graph.

Zone 1 starts at 180° West longitude and Zone 60 ends at 180° East longitude.

Zone widths are uniform over the globe, except on the southwest coast of Norway and the region around Svalbard.

Bands are labeled C to Z, run bottom to top, south to north and correspond to the 'Y axis' on a cartesian graph.

Letters "I" and "O" are not used for band labels to avoid confusion with the numbers one and zero.

Bands "C" starts at 80° South latitude and Band "X" ends at 84° North latitude.

Easting and Northings are in meters.

Eastings increase eastwards and decrease westwards.

Eastings are referenced from the center of the Zone (called the Central Meridian) and start at the number 500,000 (called the False Easting), not zero, thus eastings are never negative numbers.

Northings are referenced from the Equator.

Northings increase northward and decrease southward.

Northings run from 0 to (almost) 10,000,000 which is (about) one quarter of Earth's polar circumference of 40,007,860 meters.

Northings for the Northern Hemisphere start at the Equator from 0 and increase northwards to 9,328,195 at 84°N latitude.

Northings for the Southern Hemisphere start at the Equator from 10,000,000 and decrease southwards to 1,118,248 at 80°S latitude;

Examples:   
   A point south of equator with a northing of 7587834 is:
      10,000,000 – 7587834 = 2412166 meters south of the equator. 

  A point 34m north of the equator has a northing of 0000034 
  A point 34m south of the equator has a northing of 9999966 

You cannot tell if a Northing is from the Northern or Southern Hemisphere from the Northing number alone, so a band letter (C-X) or 'N' for the Northern Hemisphere or 'S' for Southern Hemisphere is always written after the zone number.

 
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