![]() ![]() Geographic Coordinate System 33° 40’ 12” North ° 55’ 30” West Deg. Zones are numbered 1 to 60 eastward from the Int’l Date Lineħ Logic of the UTM Grid Zone 12 500,000 m OriginĨ Reading the UTM Grid Easting is measured from the central meridian + 500,000 m Northing is measured from the equator Austin is: 621,161 m E, 3,349,894 m N, Zone 14 N, NAD 83Īccuracy level of UTM - Maximum error is: 1 m / 1000 m (5 feet in a mile) ![]() UTM = Universal Transverse Mercator Developed shortly after World War II by US Army Now, UTM system used widely for precise positioningĤ Mercator Transverse Mercator 1 UTM zone: 6 degrees wideĥ Is divided into north-south columns known as zones (between 80°S and 84°N) Strengths: One set of coordinates can describe an exact location anywhere on the globe Based on the earth’s spherical shape Issues: Subdivision of degrees: 1° = 60’ 1’ = 60” 1 degree = 60 minutes 1 minute = 60 seconds The length of 1 ° longitude varies + X axis - + (0,0) Y axis - Universal Transverse Mercator (UTM) State Plane Coordinate System (SPCS) US Public Land Survey (USPLS) 1 Alternate coordinate systems: Solutions for large-scale maps ![]()
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