Miss. Code Ann. § 89-6-5: Definitions applicable to Mississippi Coordinate System of 1927.

For purposes of more precisely defining the Mississippi Coordinate System of 1927, the following definition by the United States Coast and Geodetic Survey (now the National Ocean Service/National Geodetic Survey) is adopted:

(a) The “Mississippi Coordinate System of 1927 East Zone” is a transverse Mercator projection of the Clarke spheroid of 1866, having a central meridian eighty-eight (88) degrees fifty (50) minutes west of Greenwich, on which meridian the scale is set at one (1) part in twenty-five thousand (25,000) too small. The origin of coordinates is at the intersection of the meridian eighty-eight (88) degrees fifty (50) minutes west of Greenwich and the parallel twenty-nine (29) degrees forty (40) minutes north latitude. This origin is given the coordinates: X 500,000 feet and Y 0 feet.

(b) The “Mississippi Coordinate System of 1927 West Zone” is a transverse Mercator projection of the Clarke spheroid of 1866, having a central meridian ninety (90) degrees twenty (20) minutes west of Greenwich, on which meridian the scale is set at one (1) part in seventeen thousand (17,000) too small. The origin of coordinates is at the intersection of the meridian ninety (90) degrees twenty (20) minutes west of Greenwich and the parallel thirty (30) degrees thirty (30) minutes north latitude. This origin is given the coordinates: X 500,000 feet and Y 0 feet.