Grid Coordinate System
The following elements comprise the Grid Coordinate System section:
	Grid Coordinate System Name mandatory name of the grid coordinate system.
	One of the following Grid Coordinate System, and accompanying parameters, is mandatory
		Universal Transverse Mercator (UTM), mandatory a grid system based on the transverse mercator projection, applied between latitudes 84 degrees north and 80 degrees south on the Earth's surface.
		Universal Polar Stereographic (UPS), mandatory a grid system based on the polar stereographic projection, applied to the Earth's polar regions north of 84 degrees north and south of 80 degrees south.
		State Plane Coordinate System (SPSC), mandatory a plane-rectangular coordinate system established for each state in the United States by the National Geodetic Survey.
		ARC Coordinate System, mandatory the Equal Arc-second Coordinate System, a plane-rectangular coordinate system established in Department of Defense, 1990, Military specification ARC Digitized Raster Graphics (ADRG) (MIL-A-89007): Philadelphia, Department of Defense, Defense Printing Service Detachment Office.
		Other Grid System's Definition, mandatory a complete description of a grid system, not defined elsewhere in this standard, that was used for the data set. The information provided shall include the name of the grid system, the names of the parameters and values used for the data set, and the citation of the specification for the algorithms that describe the mathematical relationship between the Earth and the coordinates of the grid system.
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