1-A:4 Plane Coordinate Values. –
I. The plane coordinate values for a point on the earth's surface, used to express the geographic position or location of such point in this system, shall consist of 2 distances expressed in United States survey feet, which equals (1200)/(3937) meters, and decimals of a foot when using the New Hampshire coordinate system of 1927 and expressed in meters and decimals of a meter or United States survey feet and decimals of a foot when using the New Hampshire coordinate system of 1983. One of these distances, to be known as the "x-coordinate," shall give the position in an east-and-west direction; the other, to be known as the "y-coordinate," shall give the position in a north-and-south direction. These coordinates shall be made to depend upon and conform to plane rectangular coordinate values for the monumented points of the North American Horizontal Geodetic Control Network as published by the National Ocean Service/National Geodetic Survey, or its successors, and whose plane coordinates have been computed on the systems defined in this chapter. Any such station may be used for establishing a survey connection to the 1927 or 1983 New Hampshire coordinate system.
II. The plane coordinates of a point to be used in expressing the geographic position or location of the point in the appropriate zone of the NHSPCS, shall consist of 2 distances, expressed in feet and decimals of a foot or meters and decimals of a meter. When the values are expressed in feet (also known as international feet), a definition of one foot = 0.3048 meter exactly shall be used. For conversion of meters to international feet, multiply the meters by 3.280839895. One of these distances, to be known as the "north or y-coordinate," shall give the distance north of the x-axis; the other, to be known as the "east or x-coordinate," shall give the distance east of the y-axis. The y-axis of any zone shall be parallel with the central meridian of that zone. The x-axis of any zone shall be at right angles to the central meridian of that zone.
Source. 1985, 216:1, eff. July 30, 1985. 2026, 196:4, eff. June 19, 2026.