Universal Transverse Mercator (UTM) Coordinate System

• Cylindrical • Conformal • True scale along central Meridian, which

points at geographic North, or along two lines equidistant from the central Meridian (which do not point at geographic North)

Universal Transverse Mercator (UTM) Coordinate System Equations

http://www.linz.govt.nz/data/geodetic-­‐services/coordinate-­‐conversion/projection-­‐conversions/transverse-­‐mercator-­‐transformation-­‐formulae

Projection Constants

Universal  Transverse  Mercator  –  UTM  System

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UTM  is  common  for  statewide  data  

UTM  Zone  Details

Each  Zone  is  6  degrees  wide  

Zone  loca<on  defined  by  a    central  meridian  

Origin  at  the  Equator,  500,000m    west  of  the  zone  central  Meridian  

Coordinates  are  always  posi<ve      (offset  for  south  Zones)  

Coordinates  discon<nuous  across      zone  boundaries

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Arc supports many “flavors” of UTM, but in Minnesota, the most often used are the NAD83

(original, or 1986) and the various CORS96/2007/2011/HARN versions, in the

“UTM/North America” folder

Functionally, they’re equivalent

Projection UTM 83(86) to UTM83(2011)