Assertion: plane coordinate system | /r/HasProperty | linear unit of measure
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text: The state plane coordinate system in Kentucky was originally defined on the North American Datum of 1927 utilizing the Clarke Ellipsoid of 1866 with the United States Survey Foot (USFt) being the linear unit of measure, however, in 1986 the NGS adopted the North American Datum of 1983, which is based on the Geodetic Reference System of 1980 ellipsoid, with the meter being adopted as the standard unit of linear measure.