Rhode Island General Laws
Chapter 34-8 - Rhode Island Coordinate System
Section 34-8-4. - Technical definition of systems — Origin of coordinates.

§ 34-8-4. Technical definition of systems — Origin of coordinates.
(a) For purposes of more precisely defining the Rhode Island coordinate system of 1927, the following definition by the national ocean survey
ational geodetic survey is adopted:
The Rhode Island coordinate system of 1927 is a transverse Mercator projection of the Clarke spheroid of 1866, having a central meridian 71° 30′ west of Greenwich, on which meridian the scale is set at one part in one hundred sixty thousand (160,000) too small. The origin of coordinates is at the intersection of the meridian 71° 30′ west of Greenwich and the parallel 41° 05′ north latitude. This origin is given the coordinates: x = 500,000 feet and y = 0 feet.
(b) For the purposes of more precisely defining the Rhode Island coordinate system of 1983, the following definition by the national ocean survey
ational geodetic survey is adopted:
The Rhode Island coordinate system of 1983 is a transverse Mercator projection of the North American datum of 1983 having a central meridian 71° 30′ west of Greenwich, on which meridian the scale is set at one part in one hundred sixty thousand (160,000) too small. The origin of coordinates is at the intersection of the meridian 71° 30′ west of Greenwich and the parallel 41° 05′ north latitude. This origin is given the coordinates: x = 100,000 meters, and y = 100,000 meters, and y = 0 meters.
History of Section.P.L. 1945, ch. 1653, § 3; G.L. 1956, § 34-8-4; P.L. 1983, ch. 241, § 1.

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