(a) For purposes of more precisely defining the Georgia Coordinate System, the following definition of the United States Coast and Geodetic Survey, now National Ocean Survey/National Geodetic Survey, is adopted:

(1) The "Georgia Coordinate System East Zone" is a transverse Mercator projection of the Clarke spheroid of 1866, having a central meridian eighty-two degrees ten minutes west of Greenwich, on which meridian the scale is set one part in 10,000 too small. The origin of coordinates is at the intersection of the meridian eighty-two degrees ten minutes west of Greenwich and the parallel thirty degrees north latitude. This origin is given the coordinates: x = 500,000 feet and y = 0 feet; and

(2) The "Georgia Coordinate System West Zone" is a transverse Mercator projection of the Clarke spheroid of 1866, having a central meridian eighty-four degrees ten minutes west of Greenwich, on which meridian the scale is set one part in 10,000 too small. The origin of coordinates is at the intersection of the meridian eighty-four degrees ten minutes west of Greenwich and the parallel thirty degrees north latitude. This origin is given the coordinates: x = 500,000 feet and y = 0 feet.

(b) For purposes of more precisely defining the Georgia Coordinate System of 1985, the following definition by the National Ocean Survey/National Geodetic Survey is adopted:

(1) The "Georgia Coordinate System of 1985 East Zone" is a transverse Mercator projection of the North American Datum of 1983, having a central meridian eighty-two degrees ten minutes west of Greenwich, on which central meridian the scale is set one part in 10,000 too small. The origin of coordinates is at the intersection of the central meridian eighty-two degrees ten minutes west of Greenwich and the parallel thirty degrees north latitude. This origin is given the coordinates: x = 200,000 meters and y = 0.000 meters; and

(2) The "Georgia Coordinate System of 1985 West Zone" is a transverse Mercator projection of the North American Datum of 1983, having a central meridian eighty-four degrees ten minutes west of Greenwich, on which central meridian the scale is set one part in 10,000 too small. The origin of coordinates is at the intersection of the central meridian eighty-four degrees ten minutes west of Greenwich and the parallel thirty degrees north latitude. This origin is given the coordinates: x = 700,000 meters and y = 0.000 meters.